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/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// Everything in this part needs to be manually rotated about the X axis 180 degrees, then the rotate statement removed.
$fn=50;
module main()
{
module spur()
{
linear_extrude(height=7) polygon([[-1,-1],[-1,1],[0.7,0.7],[0.7,-0.7]],[[0,1,2,3,0]]);
}
difference()
{
union()
{
//base
rotate_extrude()
{
square([11,8]);
}
//shaft
translate([0,0,11])cylinder(r=14.5,h=7);
//bottom belt guide
translate([0,0,18])cylinder(r=18,h=1);
//top belt guide
difference(){
translate([0,0,8])cylinder(r=18,h=3);
rotate_extrude() {
translate([19,7.5,11]){
rotate([0,0,45])square([4.7,4.7]);
}
}
}
//spurs
for(i=[1:20]) rotate([0,0,i*(360/20)])
translate([15,0,11])spur();
}
//shaft hole
translate([0,0,-1])cylinder(r=4,h=22);
//captive nut and grub holes
for(j=[1:3]) rotate([0,0,j*(360/3)])
translate([0,20,4])rotate([90,0,0])
union()
{
//enterance
translate([0,-3,13]) cube([5.4,6,2.4],center=true);
//nut
translate([0,0,11.8]) rotate([0,0,30])cylinder(r=3.12,h=2.4,$fn=6);
//grub hole
translate([0,0,7]) cylinder(r=1.5,h=15);
}
}
}
translate([0,0,19]){
rotate([180,0,0]){
main();
}
}
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