// https://gitorious.org/ozzloy/challenge-bot
// https://github.com/waynegramlich/challenge-bot
+// use this drill jig for putting holes in a motor mount for screws
+// and motor shaft. the four tabs at the bottom are for clamping
+// the jig down.
+
mm_per_inch = 25.4;
-material_width = (1/8) * mm_per_inch;
+material_width = (1 / 8) * mm_per_inch;
board_length = 1.75 * mm_per_inch;
board_width = 1.5 * mm_per_inch;
-board_depth = (3/16) * mm_per_inch;
+board_depth = (3 / 16) * mm_per_inch;
tab_length = 3 * mm_per_inch;
-tab_width = (1/4) * mm_per_inch;
+tab_width = (1 / 4) * mm_per_inch;
union(){
rotate(a = 90, v = [1, 0, 0]) {
cube([board_length + material_width,
1.75 * mm_per_inch + material_width,
- material_width ]);}
+ material_width]);}
translate(v = [0, -material_width, 0]){
rotate(a = -90, v = [0, 1, 0]) {
cube( [1.75 * mm_per_inch + material_width,
1.5 * mm_per_inch + 2 * material_width,
- material_width ]);}}
+ material_width]);}}
- translate(v = [(1.75*mm_per_inch + material_width)/2 + tab_width,
- -tab_length, 0]){
+ translate(v = [(1.75 * mm_per_inch + material_width) / 2 + tab_width,
+ -tab_length,
+ 0]){
rotate(a = 90, v = [0 ,0 ,1 ]){
- cube([3*mm_per_inch, 0.5*mm_per_inch , material_width]);}}
+ cube([3 * mm_per_inch, 0.5 * mm_per_inch , material_width]);}}
translate(v = [-tab_length,
- (1.5*mm_per_inch + material_width)/2 - tab_width,
+ (1.5 * mm_per_inch + material_width) / 2 - tab_width,
0]){
- cube([3*mm_per_inch, 0.5*mm_per_inch , material_width]);}
+ cube([3 * mm_per_inch, 0.5 * mm_per_inch , material_width]);}
- translate(v = [(1.75*mm_per_inch + material_width)/2 + tab_width,
- (1.5*mm_per_inch),
+ translate(v = [(1.75 * mm_per_inch + material_width) / 2 + tab_width,
+ (1.5 * mm_per_inch),
0]){
rotate(a = 90, v = [0, 0, 1]){
- cube([3*mm_per_inch, 0.5*mm_per_inch , material_width]);}}
+ cube([3 * mm_per_inch, 0.5 * mm_per_inch , material_width]);}}
- translate(v = [(1.75*mm_per_inch),
- (1.5*mm_per_inch+material_width)/2 - tab_width,
+ translate(v = [(1.75 * mm_per_inch),
+ (1.5 * mm_per_inch + material_width) / 2 - tab_width,
0]){
- cube([3*mm_per_inch, 0.5*mm_per_inch , material_width]);}}
+ cube([3 * mm_per_inch, 0.5 * mm_per_inch , material_width]);}}
-_4_40 = 0.1285*mm_per_inch/2; // size of hole for 4x40
-_6_32 = 0.1495*mm_per_inch/2; // size of hole for 6x32
+_4_40 = 0.1285 * mm_per_inch / 2; // size of hole for 4x40
+_6_32 = 0.1495 * mm_per_inch / 2; // size of hole for 6x32
module collar_hole(){
- cylinder(h = board_depth, r = 2*_6_32, $fn=20);}
+ cylinder(h = board_depth, r = 2 * _6_32, $fn = 20);}
module nubbin_hole(){
- cylinder(h = board_depth, r = _6_32, $fn=20);}
+ cylinder(h = board_depth, r = _6_32, $fn = 20);}
module mounting_screw_hole(){
- cylinder(h = board_depth, r = _6_32, $fn=20);}
+ cylinder(h = board_depth, r = _6_32, $fn = 20);}
module bracket_screw_hole(){
- cylinder(h = board_depth, r = _6_32, $fn=20);}
+ cylinder(h = board_depth, r = _6_32, $fn = 20);}
module wheel_motor_holes(scale){
- translate([ 51-26.78,38-10.8, 0] * scale) {
+ translate([51 - 26.78, 38 - 10.8, 0] * scale) {
collar_hole();}
- translate([ 51-26.78,38-22.23, 0] * scale){
+ translate([51 - 26.78, 38 - 22.23, 0] * scale){
nubbin_hole();}
- translate([51-18.05-17.45,38-30.81, 0] * scale){
+ translate([51 - 18.05 - 17.45, 38 - 30.81, 0] * scale){
mounting_screw_hole();}
- translate([51-18.05,38-30.81, 0] * scale){
+ translate([51 - 18.05, 38 - 30.81, 0] * scale){
mounting_screw_hole();}
- translate([7.5,8.5, 0] * scale){
+ translate([7.5, 8.5, 0] * scale){
bracket_screw_hole();}
- translate([7.5,21+8.5, 0] * scale){
+ translate([7.5, 21 + 8.5, 0] * scale){
bracket_screw_hole();}}
module wheel_mount(scale){