Merge branch 'martinbudden-belt_test_corexy'

readme.md

@@ -250,15 +250,16 @@ Individual teeth are not drawn, instead they are represented by a lighter colour
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
 |   1 | ```belt(GT2x6, [ ... ])``` |  Belt GT2 x 6mm x 128mm |
-|   1 | ```belt(GT2x6, [ ... ], 80, [0, 0])``` |  Belt GT2 x 6mm x 696mm |
+|   2 | ```belt(GT2x6, [ ... ], 80, [0, 0])``` |  Belt GT2 x 6mm x 572mm |
 |   1 | ```belt(T2p5x6, [ ... ])``` |  Belt T2.5 x 6mm x 130mm |
 |   1 | ```belt(T5x10, [ ... ])``` |  Belt T5 x 10mm x 130mm |
 |   1 | ```belt(T5x6, [ ... ])``` |  Belt T5 x 6mm x 130mm |
-|   1 | ```insert(F1BM3)``` |  Heatfit insert M3 |
-|   2 | ```pulley(GT2x20_toothed_idler)``` |  Pulley GT2 idler 20 teeth |
+|   2 | ```insert(F1BM3)``` |  Heatfit insert M3 |
+|   2 | ```pulley(GT2x16_toothed_idler)``` |  Pulley GT2 idler 16 teeth |
+|   4 | ```pulley(GT2x20_toothed_idler)``` |  Pulley GT2 idler 20 teeth |
 |   2 | ```pulley(GT2x16_plain_idler)``` |  Pulley GT2 idler smooth 9.63mm |
 |   2 | ```pulley(GT2x20ob_pulley)``` |  Pulley GT2OB 20 teeth |
-|   1 | ```screw(M3_cs_cap_screw, 20)``` |  Screw M3 cs cap x 20mm |
+|   2 | ```screw(M3_cs_cap_screw, 20)``` |  Screw M3 cs cap x 20mm |
 |   4 | ```screw(M3_grub_screw, 6)``` |  Screw M3 grub x  6mm |
 
 

tests/belts.scad

@@ -23,24 +23,23 @@ use <../vitamins/insert.scad>
 use <../utils/layout.scad>
 
 module belt_test() {
-    p1 = [75,  -50];
     p2 = [-75, -50];
     p3 = [-75, 100];
     p4 = [75,  100];
 
-    p5 = [75  - pulley_pr(GT2x20ob_pulley) - pulley_pr(GT2x16_plain_idler),  -pulley_pr(GT2x16_plain_idler)];
+    p5 = [75  + pulley_pr(GT2x20ob_pulley) - pulley_pr(GT2x16_plain_idler), +pulley_pr(GT2x16_plain_idler)];
     p6 = [-75 + pulley_pr(GT2x20ob_pulley) + pulley_pr(GT2x16_plain_idler), -pulley_pr(GT2x16_plain_idler)];
 
-    translate(p1) pulley_assembly(GT2x20ob_pulley);
-    translate(p2) pulley_assembly(GT2x20ob_pulley);
+    module pulleys(flip = false) {
+        translate(p2) rotate([0, flip ? 180 : 0, 0]) pulley_assembly(GT2x20ob_pulley);
         translate(p3) pulley_assembly(GT2x20_toothed_idler);
         translate(p4) pulley_assembly(GT2x20_toothed_idler);
-
         translate(p5) {
-        pulley = GT2x16_plain_idler;
+            pulley = GT2x16_toothed_idler;
             screw = find_screw(hs_cs_cap, pulley_bore(pulley));
             insert = screw_insert(screw);
 
+            rotate([0, flip ? 180 : 0, 0]) {
                 pulley_assembly(pulley);
                 translate_z(pulley_height(pulley) + pulley_offset(pulley) + screw_head_depth(screw, pulley_bore(pulley)))
                     screw(screw, 20);
@@ -48,21 +47,28 @@ module belt_test() {
                 translate_z(pulley_offset(pulley) - insert_length(insert))
                     vflip()
                         insert(insert);
-
+            }
         }
         translate(p6) pulley_assembly(GT2x16_plain_idler);
+    }
 
-    path = [ [p1.x, p1.y, pulley_pr(GT2x20ob_pulley)],
-             [p5.x, p5.y, -pulley_pr(GT2x16_plain_idler)],
+    path = [ [p5.x, p5.y, pulley_pr(GT2x16_plain_idler)],
              [p6.x, p6.y, -pulley_pr(GT2x16_plain_idler)],
              [p2.x, p2.y, pulley_pr(GT2x20ob_pulley)],
              [p3.x, p3.y, pulley_pr(GT2x20ob_pulley)],
              [p4.x, p4.y, pulley_pr(GT2x20ob_pulley)]
            ];
+
     belt = GT2x6;
     belt(belt, path, 80, [0,  0]);
+    pulleys();
+    translate_z(20)
+        hflip() {
+            belt(belt, path, 80, [0,  0], belt_colour = grey(90), tooth_colour = grey(50));
+            pulleys(flip=true);
+        }
 
-    translate([-25, 0])
+    translate([-25, 0, 10])
         layout([for(b = belts) belt_width(b)], 10)
             rotate([0, 90, 0])
                 belt(belts[$i], [[0, 0, 20], [0, 1, 20]], belt_colour = $i%2==0 ? grey(90) : grey(20), tooth_colour = $i%2==0 ? grey(70) : grey(50));