make new wheel that doesn't warp in sun

[challenge-bot] / 3d-printables / wheel.scad

diff --git a/3d-printables/wheel.scad b/3d-printables/wheel.scad
index bcf91f883e5df16e76b63d3c28169af1830084db..4ca975bc11b634ed8e62442b10098bdbde7ccd8b 100644 (file)
--- a/3d-printables/wheel.scad
+++ b/3d-printables/wheel.scad
@@ -11,21 +11,21 @@ $fn = 100;
 
 use <qr.scad>
 
-qr_size = 54;
+qr_size = 45;
 qr_height = 2;
 
 wall_width = 3;
 
-wheel_width = 6;
+wheel_width = 9;
 wheel_radius = sqrt(2 * pow(qr_size / 2, 2)) + wall_width / 2;
 
 motor_shaft_radius = 3.7;
 motor_shaft_flat_width = 4.8;
 
-tread_radius = 2.5 / 2;
+tread_radius = 4 / 2;
 
 module mounting_screw_flat(){
-  square(2, center = true);}
+  circle(0.75);}
 
 module motor_shaft_flat(radius, flat_width){
   intersection(){
@@ -101,9 +101,38 @@ module wheel(radius,
               tread_radius);
   wheel_white();}
 
+module wheel_solid(radius,
+                   width,
+                   shaft_radius,
+                   shaft_flat_width,
+                   wall_width,
+                   tread_radius){
+  difference(){
+    rim(radius, wall_width * 2, width);
+    translate([0, 0, width / 2]){
+      tread(radius, tread_radius);}}
+  linear_extrude(height = qr_height){
+    difference (){
+      square(qr_size, center = true);
+      mounting_screw_flat(); } }
+  translate([0, 0, qr_height]){
+    motor_shaft_holder(shaft_radius,
+                       shaft_flat_width,
+                       wall_width,
+                       width - qr_height);}}
+
+/*
 wheel(wheel_radius,
       wheel_width,
       motor_shaft_radius,
       motor_shaft_flat_width,
       wall_width,
       tread_radius);
+*/
+
+wheel_solid(wheel_radius,
+            wheel_width,
+            motor_shaft_radius,
+            motor_shaft_flat_width,
+            wall_width,
+            tread_radius);