added 2nd e3d fan

lib/linear_bearing.scad

@@ -74,7 +74,13 @@ e3d_clamp_cut = 0.2; // x2
 e3d_clamp_hole_off = 4;
 e3d_hole_dia = 3.2;
 
-draw_x_carriage = true;
+fan_mount_wall = 5;
+fan_mount_inset = 5;
+fan_width = 40;
+fan_height = 20;
+fan_hole_off = 3; // TODO measure!
+
+draw_x_carriage = false;
 draw_y_carriage = false;
 draw_y_carriage_idlers = true;
 draw_rail_len = 200;
@@ -90,6 +96,13 @@ module lm8uu() {
 
 // TODO add cable tie canal for lm8uu mounting
 
+// TODO mounting holes on actual carriage
+
+// TODO also universal mounting holes
+// at front and back of carriage.
+// front: auto level sensor
+// back: filament fan
+
 // TODO get ready to actually print these
 
 module generate_spacer(pos) {
@@ -422,53 +435,88 @@ module e3d_v6_triple_mount() {
             cylinder(d = e3d_upper_small_dia + e3d_clamp_dia_add, h = e3d_clamp_height + 2);
     }
     
-    fan_mount_wall = 5;
-    fan_mount_inset = 5;
-    fan_width = 40;
-    fan_height = 20;
-    
+    e3d_v6_triple_fan();
+}
+
+module simple_fan() {
+    difference() {
+        cube([fan_height, fan_width, fan_width]);
+        translate([-1, fan_width / 2, fan_width / 2])
+            rotate([0, 90, 0])
+            cylinder(d = fan_width - 5, h = fan_height + 2);
+    }
+}
+
+module fan_mount() {
+    difference() {
+        cube([fan_mount_wall, fan_width, fan_width + x_carriage_wall]);
+        
+        translate([-1, fan_mount_inset, fan_mount_inset])
+            cube([fan_mount_wall + 2, fan_width - (fan_mount_inset * 2), fan_width - (fan_mount_inset * 2)]);
+    }
+}
+
+module e3d_v6_triple_fan() {
     difference() {
         union() {
             translate([x_carriage_width, (x_carriage_length - fan_width) / 2, -fan_width]) {
-                // hotend cooling fan
-                color("grey")
+                // hotend cooling fan on right side
                 %translate([fan_mount_wall, 0, 0])
-                difference() {
-                    cube([fan_height, fan_width, fan_width]);
-                    translate([-1, fan_width / 2, fan_width / 2])
-                        rotate([0, 90, 0])
-                        cylinder(d = fan_width - 5, h = fan_height + 2);
-                }
+                    simple_fan();
                 
-                // fan mount
+                // hotend cooling fan on left side
+                %translate([-x_carriage_width - fan_height - fan_mount_wall, 0, 0])
+                    simple_fan();
+                
+                // fan mount on right side
                 color("orange")
-                difference() {
-                    cube([fan_mount_wall, fan_width, fan_width + x_carriage_wall]);
-                    
-                    translate([-1, fan_mount_inset, fan_mount_inset])
-                        cube([fan_mount_wall + 2, fan_width - (fan_mount_inset * 2), fan_width - (fan_mount_inset * 2)]);
-                }
+                fan_mount();
+                
+                // fan mount on left side
+                color("orange")
+                translate([-x_carriage_width - fan_mount_wall, 0, 0])
+                    fan_mount();
             }
             
             // fan duct
             color("orange")
             translate([x_carriage_width, (x_carriage_length - fan_width) / 2, 0])
             difference() {
-                fan_duct(40, (fan_width - 40) / 2);
-                fan_duct(37, (fan_width - 37) / 2);
+                fan_duct(fan_width, 0);
+                fan_duct(fan_width, 3);
             }
         }
         
-        // TODO mounting holes
-        // TODO fan holes
+        // mounting holes on carriage
+        translate([-fan_mount_wall - fan_height - 1, x_carriage_length / 2, x_carriage_wall / 2])
+        for (i = [-1 : 2 : 1]) {
+            translate([0, i * ((fan_width / 2) - 8), 0])
+                rotate([0, 90, 0])
+                cylinder(d = 3.2, h = x_carriage_width + (2 * (fan_height + fan_mount_wall + 1)));
+        }
+        
+        // fan holes (self-tapping)
+        translate([-fan_mount_wall - fan_height - 1, x_carriage_length / 2, -fan_width / 2])
+        for (i = [-1 : 2 : 1]) {
+            for (j = [-1 : 2 : 1]) {
+                translate([0, i * ((fan_width / 2) - fan_hole_off), j * ((fan_width / 2) - fan_hole_off)])
+                    rotate([0, 90, 0])
+                    cylinder(d = 2.7, h = fan_height + fan_mount_wall + 5);
+                translate([fan_height + fan_mount_wall + x_carriage_width - 3, i * ((fan_width / 2) - fan_hole_off), j * ((fan_width / 2) - fan_hole_off)])
+                    rotate([0, 90, 0])
+                    cylinder(d = 2.7, h = fan_height + fan_mount_wall + 5);
+            }
+        }
     }
 }
 
-module fan_duct(size, off) {
+module fan_duct(fan_width, diff) {
+    size = fan_width - diff;
+    off = (fan_width - size) / 2;
     difference() {
         translate([0, off, -size - off]) {
             hull() {
-                cube([1, size, size]);
+                cube([1 + (diff / 10), size, size]);
                 translate([-10, 0, 10])
                     cube([1, size, size - 11]);
             }
@@ -493,22 +541,24 @@ module fan_duct(size, off) {
             hull() {
                 translate([-55, -6, 17])
                     cube([1, size + 12, size - 20]);
-                if (off > 0) {
-                    translate([-71, 15, 17])
-                        cube([1, size - 12, size - 20]);
-                } else {
-                    translate([-70, 15, 17])
-                        cube([1, size - 12, size - 20]);
-                }
+                translate([-70, 15 - 10, 17])
+                        cube([1, size - 12 + 10, size - 20]);
+            }
+            hull() {
+                translate([-70, 15 - 10, 17])
+                        cube([1, size - 12 + 10, size - 20]);
+                
+                translate([-80 - (off / 10), 0, 0])
+                    cube([1 + (off / 10), size, size]);
             }
         }
         
         translate([-26, 29.5, -size - 20])
-            cylinder(d = e3d_max_dia + 3, h = 100);
+            cylinder(d = e3d_max_dia + 3 - diff, h = 100);
         translate([-26 - e3d_v6_dist_x, 29.5, -size - 20])
-            cylinder(d = e3d_max_dia + 3, h = 100);
+            cylinder(d = e3d_max_dia + 3 - diff, h = 100);
         translate([-26 - e3d_v6_dist_x / 2, 29.5 - e3d_v6_dist_y, -size - 20])
-            cylinder(d = e3d_max_dia + 3, h = 100);
+            cylinder(d = e3d_max_dia + 3 - diff, h = 100);
     }
 }