add wheel mount reinforcements

[challenge-bot] / schematic-3d-printable.scad

diff --git a/schematic-3d-printable.scad b/schematic-3d-printable.scad
index 3e11090dc14e170c732f37a12c4bb8014efa9813..ee5050d168ff7c4923e45b0b03ae318024068314 100644 (file)
--- a/schematic-3d-printable.scad
+++ b/schematic-3d-printable.scad
@@ -8,33 +8,65 @@
 // https://github.com/josefprusa/Prusa3/blob/master/box_frame/x-carriage.scad
 // as an example of how to code in scad
 
-deck_dimensions = [8, 8, 3/16];
+scale=10;
 
-module deck() {
-       cube(deck_dimensions);
-}
+deck_z = 3/16;
+deck_x = 8;
+deck_y = 8;
+deck_dimensions = [deck_x, deck_y, deck_z];
+
+module deck(scale){
+  cube(deck_dimensions * scale, center = true);}
+
+module collar_hole(scale){
+  cylinder(h = 5/16 * scale, r = 0.362/2 * scale, $fn = 100);}
+
+module nubbin_hole(scale){
+  cylinder(h = 5/16 * scale, r = 0.145/2 * scale, $fn = 100);}
 
-module wheel_mount() {
-       difference() {
-               cube([1.5, 2.1, 3/16]);
-               // motor shaft and collar hole
-               translate([0.5, 0.938, -1/16]) {
-                       cylinder(h = 5/16, r = 0.362/2, $fn = 100);
-               }
-               // nubbin hole
-               translate([0.5 + 0.875 - 0.425, 0.938, -1/16]) {
-                       cylinder(h = 5/16, r = 0.145/2, $fn = 100);
-               }
-               // mounting screw hole
-               translate([0.5 + 1.213 - 0.425, 0.938 - 0.687/2, -1/16]) {
-                       cylinder(h = 5/16, r = 0.114/2, $fn = 100);
-               }
-               translate([0.5 + 1.213 - 0.425, 0.938 + 0.687/2, -1/16]) {
-                       cylinder(h = 5/16, r = 0.114/2, $fn = 100);
-               }
-       }
+module mounting_screw_hole(scale){
+  cylinder(h = 5/16 * scale, r = 0.114/2 * scale, $fn = 100);}
+
+module wheel_mount_reinforcement(scale){
+  diagonal = sqrt(deck_z * deck_z + deck_z * deck_z);
+  difference(){
+    cube([deck_z * 2, deck_z * 2, deck_z * 2] * scale);
+    translate([-(diagonal - deck_z) / 2, 0, 0] * scale)
+      rotate([45, 0, 0])
+        translate([0, -(diagonal * 1.1 - deck_z) / 2, 0])
+          cube([diagonal * 2, diagonal * 2 * 1.1, deck_z * 2] * scale);}}
+
+module wheel_mount(scale){
+  difference(){
+    cube([1.5, 2, 3/16] * scale);
+    // motor shaft collar hole
+    translate([0.5, 0.938, -1/16] * scale) {
+      collar_hole(scale);}
+    // nubbin hole
+    translate([0.5 + 0.875 - 0.425, 0.938, -1/16] * scale){
+      nubbin_hole(scale);}
+    // mounting screw hole
+    translate([0.5 + 1.213 - 0.425, 0.938 - 0.687/2, -1/16] * scale){
+      mounting_screw_hole(scale);}
+    translate([0.5 + 1.213 - 0.425, 0.938 + 0.687/2, -1/16] * scale){
+      mounting_screw_hole(scale);}}}
+
+translate([0, 0, (3/16)/2 * scale]){
+  color("blue") deck(scale);
+  rotate([90, 0, 0])
+    translate([1.5, (deck_z)/2, -4] * scale) wheel_mount(scale);
+  rotate([90, 0, 0])
+    translate([1.5, (deck_z)/2, 4 - deck_z] * scale) wheel_mount(scale);
 }
 
-color("blue") deck();
-rotate([90, 0, 0]) translate([1.5, -2, -(3/16)]) wheel_mount();
-rotate([90, 0, 0]) translate([1.5, -2, -8]) wheel_mount();
+translate([1.5, deck_y/2 - deck_z * 3, deck_z] * scale){
+  wheel_mount_reinforcement(scale);}
+translate([1.5 * 2 - deck_z * 2, deck_y / 2 - deck_z * 3, deck_z] * scale){
+  wheel_mount_reinforcement(scale);}
+
+translate([1.5 + deck_z * 2, 3 * deck_z - deck_y / 2, deck_z] * scale){
+  rotate([0, 0, 180]){
+    wheel_mount_reinforcement(scale);}}
+translate([1.5 * 2, 3 * deck_z - deck_y / 2, deck_z] * scale){
+  rotate([0, 0, 180]){
+    wheel_mount_reinforcement(scale);}}