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add trackball cup model

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Lukas F. Hartmann 2023-12-27 13:07:40 +01:00
parent 18286f8b7d
commit d18e218d9a
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2 changed files with 76 additions and 0 deletions
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pocket-reform-trackball-cup/pocket-reform-trackball-cup-plate31.stl Normal file
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pocket-reform-trackball-cup/pocket-reform-trackball-cup.scad Normal file
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inner_d = 18.2;
outer_d = 23;
bearing_d = 2.5;
res = 50;
num_bearings = 3;
delta = 360 / num_bearings;
bearing_circle_r = 7.8;
bearing_circle_y = -3;
tube_h = 4.5;
offset = 30;
screw_d = 1.85;
screw_x = 12.8;
screw_y = 9.05;
screw_y2 = 9.3;
plate_thickness = 3.1; // was 2.6
difference() {
union() {
difference() {
union() {
translate([0,0,2]) sphere(d = outer_d, $fn = res);
translate([-6.12, 0, -tube_h - tube_h/2]) cylinder(h = tube_h, d=4, $fn = res, center = true);
translate([ 6.12, 0, -tube_h - tube_h/2]) cylinder(h = tube_h, d=4, $fn = res, center = true);
}
translate([-4,-4,-11]) cube([8,8,9]);
translate([-12,-12,0]) cube([24,24,14]);
union() {
for (i = [0:2]) {
phi = offset + i * delta;
translate([
bearing_circle_r * cos(phi),
bearing_circle_r * sin(phi),
bearing_circle_y])
sphere(d = 0.5+bearing_d, $fn=res);
}
translate([0,0,2]) sphere(d = inner_d, $fn=res);
// tube screw cuts
translate([-6.12, 0, -tube_h - tube_h/2]) cylinder(h = tube_h+2, d=screw_d, $fn = res, center = true);
translate([ 6.12, 0, -tube_h - tube_h/2]) cylinder(h = tube_h+2, d=screw_d, $fn = res, center = true);
}
}
// bearings
/*for (i = [0:2]) {
phi = offset + i * delta;
translate([
bearing_circle_r * cos(phi),
bearing_circle_r * sin(phi),
bearing_circle_y])
sphere(d = bearing_d, $fn=res);
}*/
// plate
translate([0,0.5,0]) difference() {
translate([0, 0, -plate_thickness/2]) cube([28.5, 21.5, plate_thickness], center = true);
translate([0,-0.5,0]) translate([0, 0, plate_thickness]) sphere(d = outer_d-0.5, $fn = res);
translate([-screw_x, screw_y, 0]) cylinder(h = 8, d=screw_d, $fn = res, center = true);
translate([ screw_x, screw_y, 0]) cylinder(h = 8, d=screw_d, $fn = res, center = true);
translate([-screw_x,-screw_y2, 0]) cylinder(h = 8, d=screw_d, $fn = res, center = true);
translate([ screw_x,-screw_y2, 0]) cylinder(h = 8, d=screw_d, $fn = res, center = true);
}
// trackball itself
//translate([0,0,1]) sphere(d = 15, $fn=res);
}
// cut away outer sphere overhang (due to assymetry)
translate([0,-21.5/2 - 0.5,-plate_thickness/2]) cube([30,2,plate_thickness+1], center = true);
// cut view
//translate([0,0,-10]) cube(20, center=false);
};