Add ARC_SEGMENTS_PER_SEC for finer G2/G3 arcs (#16510)

Marlin/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

Marlin/src/gcode/motion/G2_G3.cpp

               mm_of_travel = linear_travel ? HYPOT(flat_mm, linear_travel) : ABS(flat_mm);
   if (mm_of_travel < 0.001f) return;
 
-  uint16_t segments = FLOOR(mm_of_travel / (MM_PER_ARC_SEGMENT));
+  const feedRate_t scaled_fr_mm_s = MMS_SCALED(feedrate_mm_s);
+
+  #ifdef ARC_SEGMENTS_PER_SEC
+    float seg_length = scaled_fr_mm_s * _RECIP(ARC_SEGMENTS_PER_SEC);
+    NOLESS(seg_length, MM_PER_ARC_SEGMENT);
+  #else
+    constexpr float seg_length = MM_PER_ARC_SEGMENT;
+  #endif
+  uint16_t segments = FLOOR(mm_of_travel / seg_length);
   NOLESS(segments, min_segments);
 
   /**
   // Initialize the extruder axis
   raw.e = current_position.e;
 
-  const feedRate_t scaled_fr_mm_s = MMS_SCALED(feedrate_mm_s);
 
   #if ENABLED(SCARA_FEEDRATE_SCALING)
-    const float inv_duration = scaled_fr_mm_s / MM_PER_ARC_SEGMENT;
+    const float inv_duration = scaled_fr_mm_s / seg_length;
   #endif
 
   millis_t next_idle_ms = millis() + 200UL;
       planner.apply_leveling(raw);
     #endif
 
-    if (!planner.buffer_line(raw, scaled_fr_mm_s, active_extruder, MM_PER_ARC_SEGMENT
+    if (!planner.buffer_line(raw, scaled_fr_mm_s, active_extruder, seg_length
       #if ENABLED(SCARA_FEEDRATE_SCALING)
         , inv_duration
       #endif
     planner.apply_leveling(raw);
   #endif
 
-  planner.buffer_line(raw, scaled_fr_mm_s, active_extruder, MM_PER_ARC_SEGMENT
+  planner.buffer_line(raw, scaled_fr_mm_s, active_extruder, seg_length
     #if ENABLED(SCARA_FEEDRATE_SCALING)
       , inv_duration
     #endif

config/default/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/3DFabXYZ/Migbot/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/ADIMLab/Gantry v1/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/ADIMLab/Gantry v2/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/AlephObjects/TAZ4/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Alfawise/U20-bltouch/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Alfawise/U20/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/AliExpress/UM2pExt/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Anet/A2/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Anet/A2plus/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Anet/A6/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Anet/A8/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Anet/A8plus/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Anet/E10/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Anet/E16/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/AnyCubic/i3/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/ArmEd/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Artillery/Genius/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Artillery/Sidewinder X1/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/BIBO/TouchX/cyclops/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/BIBO/TouchX/default/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/BQ/Hephestos/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/BQ/Hephestos_2/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/BQ/WITBOX/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/BigTreeTech/SKR Mini E3 1.0/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/BigTreeTech/SKR Mini E3 1.2/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Cartesio/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/CR-10/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/CR-10S/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/CR-10_5S/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/CR-10mini/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/CR-20 Pro/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/CR-20/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/CR-8/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/Ender-2/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/Ender-3/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/Ender-4/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/Ender-5 Pro/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Creality/Ender-5/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Dagoma/Disco Ultimate/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/EXP3D/Imprimante multifonction/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
-  #define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
-  #define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
+  #define ARC_P_CIRCLES           // Enable the 'P' parameter to specify complete circles
+  #define CNC_WORKSPACE_PLANES    // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif
 
 // Support for G5 with XYZE destination and IJPQ offsets. Requires ~2666 bytes.

config/examples/Einstart-S/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/FYSETC/AIO_II/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/FYSETC/Cheetah 1.2/BLTouch/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/FYSETC/Cheetah 1.2/base/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/FYSETC/Cheetah/BLTouch/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/FYSETC/Cheetah/base/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/FYSETC/F6_13/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/FYSETC/S6/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Felix/DUAL/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Felix/Single/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/FlashForge/CreatorPro/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/FolgerTech/i3-2020/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Formbot/Raptor/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Formbot/T_Rex_2+/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Formbot/T_Rex_3/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Geeetech/A10/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Geeetech/A10D/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Geeetech/A10M/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Geeetech/A10T/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Geeetech/A20/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Geeetech/A20M/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Geeetech/A20T/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Geeetech/A30/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
-  #define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
-  #define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
+  #define ARC_P_CIRCLES           // Enable the 'P' parameter to specify complete circles
+  #define CNC_WORKSPACE_PLANES    // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif
 
 // Support for G5 with XYZE destination and IJPQ offsets. Requires ~2666 bytes. - unused by most slicers

config/examples/Geeetech/D200/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
-  #define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
-  #define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
+  #define ARC_P_CIRCLES           // Enable the 'P' parameter to specify complete circles
+  #define CNC_WORKSPACE_PLANES    // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif
 
 // Support for G5 with XYZE destination and IJPQ offsets. Requires ~2666 bytes. - unused by most slicers

config/examples/Geeetech/E180/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
-  #define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
-  #define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
+  #define ARC_P_CIRCLES           // Enable the 'P' parameter to specify complete circles
+  #define CNC_WORKSPACE_PLANES    // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif
 
 // Support for G5 with XYZE destination and IJPQ offsets. Requires ~2666 bytes. - unused by most slicers

config/examples/Geeetech/M201/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
-  #define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
-  #define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
+  #define ARC_P_CIRCLES           // Enable the 'P' parameter to specify complete circles
+  #define CNC_WORKSPACE_PLANES    // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif
 
 // Support for G5 with XYZE destination and IJPQ offsets. Requires ~2666 bytes. - unused by most slicers

config/examples/Geeetech/MeCreator2/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Geeetech/PI3A PRO/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Geeetech/Prusa i3 Pro C/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Geeetech/Prusa i3 Pro W/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/HMS434/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Infitary/i3-M508/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/JGAurora/A1/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/JGAurora/A5/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/JGAurora/A5S/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/JGAurora/Magic/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/MakerFarm/Pegasus_12/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/MakerParts/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Malyan/M150/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Malyan/M200/Configuration_adv.h

 //
 //#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Micromake/C1/enhanced/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Mks/Robin/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Mks/Sbase/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Modix/Big60/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/RapideLite/RL200/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Renkforce/RF100/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Renkforce/RF100XL/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Renkforce/RF100v2/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/RigidBot/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/SCARA/MP_SCARA/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/SCARA/Morgan/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/STM32/Black_STM32F407VET6/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Sanguinololu/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Tevo/Michelangelo/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Tevo/Nereus/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif

config/examples/Tevo/Tarantula Pro/Configuration_adv.h

 //
 #define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
+  #define MM_PER_ARC_SEGMENT    1 // (mm) Length (or minimum length) of each arc segment
+  #define MIN_ARC_SEGMENTS     24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION     25 // Number of interpolated segments between corrections
   //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
   //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif