projects
/
challenge-bot
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
clearly comment the shape and placement
[challenge-bot]
/
wheel.scad
diff --git
a/wheel.scad
b/wheel.scad
index a3bb53aac8d6b9923d3f5a96bbebd73324679043..131caf8d5af204b1f7fc47d891bddedb5054fe61 100644
(file)
--- a/
wheel.scad
+++ b/
wheel.scad
@@
-8,15
+8,18
@@
wheel_depth = 6;
wheel_radius = 68/2;
module encoder_shaft(){
wheel_radius = 68/2;
module encoder_shaft(){
- motor_shaft_big = 3.7;
- motor_shaft_small = 4.8;
- motor_shaft_length = wheel_depth / 2;
+ // measured with calipers, checked against the motor shaft
+ motor_shaft_big = 3.7; // radius, gets doubled in cylinder
+ motor_shaft_small = 4.8; // total length of box
+ motor_shaft_length = wheel_depth * 3 / 4;
intersection(){
cylinder(h = motor_shaft_length,
r = motor_shaft_big,
center = true,
intersection(){
cylinder(h = motor_shaft_length,
r = motor_shaft_big,
center = true,
- $fn=30);
+ $fn = 30);
+ // x direction is multiplied by 2 because the radius of the cylinder
+ // goes in both directions. the extra .1 is for overlap
cube([motor_shaft_big * 2.1, motor_shaft_small, motor_shaft_length],
center = true);}}
cube([motor_shaft_big * 2.1, motor_shaft_small, motor_shaft_length],
center = true);}}
@@
-28,7
+31,7
@@
module wheel(){
difference(){
cylinder(h = wheel_depth, r = wheel_radius, center = true, $fn = 30);
translate([0, 0, wheel_depth / 4]){
difference(){
cylinder(h = wheel_depth, r = wheel_radius, center = true, $fn = 30);
translate([0, 0, wheel_depth / 4]){
- scale([1, 1,
2
]){
+ scale([1, 1,
1.1
]){
encoder_shaft();}}
mounting_screw();
for(i = [1 : 5]){
encoder_shaft();}}
mounting_screw();
for(i = [1 : 5]){