add bltouch to am8. fix typo in nas page.

input/projects/3d-printing/i3-am8.md

 parent: 3d-printing
 position: 10
 date: 2022-10-08
-update: 2022-10-15
+update: 2022-10-22
 comments: true
 ---
 
 
 <!--%
 lightgallery([
+    [ "img/am8_bltouch.jpg", "BL Touch clone on hotend" ],
     [ "img/am8_corexz_2.png", "CAD screenshot of extruder / hotend"],
 ])
 %-->
 gear_ratio: 36:20 # CoreXZ gearbox
 rotation_distance: 40 # 20 teeth * 2mm belt
 endstop_pin: ^!PC2
-position_endstop: 0.0
+position_endstop: 0.200
 position_min: 0.0
 position_max: 275.0
 homing_speed: 40
 [controller_fan controller_fan]
 pin: PB15 # fan 2
 
+############################################
+############### Bed Leveling ###############
+############################################
+
+[bltouch]
+sensor_pin: ^PC14
+control_pin: PA1
+x_offset: -37
+y_offset: -2
+z_offset: 3.151
+speed: 10
+
+[bed_mesh]
+speed: 200
+mesh_min: 5, 5
+mesh_max: 190, 195
+horizontal_move_z: 10
+probe_count: 5, 5
+mesh_pps: 4, 4
+
+[gcode_macro G29]
+gcode:
+    BED_MESH_CALIBRATE
+
 ###########################################
 ########### LCD / Encoder / LED ###########
 ###########################################

input/projects/nas_2018.md

 ])
 %-->
 
-The screenshots above also show the average CPU usage, with shows the Celeron is plenty enough for now.
+The screenshots above also show the average CPU usage, which shows the Celeron is plenty enough for now.
 The power usage is reported by the UPS via USB.
 Blank spots in the third graph are caused by the data-polling daemon running on my desktop PC, which is turned off at night.
 The spike at the end of the month in all three graphs is caused by the monthly ZFS scrub.