module fillet(radius, height=100, $fn=0) {
//this creates acutal fillet
- translate([-radius, -radius, -height/2-0.01])
- difference() {
- cube([radius*2, radius*2, height+0.02]);
- cylinder(r=radius, h=height+0.02, $fn=$fn);
+ translate([-radius, -radius, -height / 2 - 0.02]) difference() {
+ cube([radius * 2, radius * 2, height + 0.04]);
+ if ($fn == 0 && (radius == 2 || radius == 3 || radius == 4)) {
+ cylinder(r=radius, h=height + 0.04, $fn=4 * radius);
+ } else {
+ cylinder(r=radius, h=height + 0.04, $fn=$fn);
}
+
+ }
}
module cube_fillet(size, radius=-1, vertical=[3,3,3,3], top=[0,0,0,0], bottom=[0,0,0,0], center=false, $fn=0){
//
- if (center) {
- cube_fillet_inside(size, radius, vertical, top, bottom, $fn);
- } else {
- translate([size[0]/2, size[1]/2, size[2]/2])
+ if (use_fillets) {
+ if (center) {
cube_fillet_inside(size, radius, vertical, top, bottom, $fn);
+ } else {
+ translate([size[0]/2, size[1]/2, size[2]/2])
+ cube_fillet_inside(size, radius, vertical, top, bottom, $fn);
+ }
+ } else {
+ cube(size, center);
}
+
}
module cube_negative_fillet(size, radius=-1, vertical=[3,3,3,3], top=[0,0,0,0], bottom=[0,0,0,0], $fn=0){
if (places[i] == 1) {
rotate([0, 0, 90*i]) translate([size, size, 0]) {
if (holes) {
- #rotate([0, 0, -90*i]) translate([0,0,-10]) screw(r=1.7, slant=false, head_drop=13, $fn=$fn, h=h+12);
+ rotate([0, 0, -90*i]) translate([0,0,-10]) screw(r=1.7, slant=false, head_drop=13, $fn=$fn, h=h+12);
} else {
rotate([0, 0, -90*i]) cylinder(h=h, r=5.5, $fn=$fn);
}
}
}
-module screw(h=20, r=2, r_head=3.5, head_drop=0, slant=true, poly=false, $fn=0){
+module screw(h=20, r=2, r_head=3.5, head_drop=0, slant=i_am_box, poly=false, $fn=0){
//makes screw with head
//for substraction as screw hole
if (poly) {
}
}
-//cube_fillet([10,20,30], vertical=[3,2,0,0], top=[3,2,0,5], bottom=[3,2,0,5]);
-//cube_fillet([10,20,30], radius=2, top=[7,2,7,2]);
+module plate_screw(long=0) {
+ if (i_am_box == 0) {
+ translate([0, 0, -long]) screw(head_drop=14 + long, h=20 + long, r_head=3.6, r=1.7, $fn=24, slant=false);
+ } else {
+ translate([0, 0, -2 - long]) screw(head_drop=14 + long, h=20 + long, r_head=4.5, r=2, $fn=24, slant=true);
+ }
+}
+
+//radius of the idler assembly (to surface that touches belt, ignoring guide walls)
+function idler_assy_r_inner(idler_bearing) = (idler_bearing[0] / 2) + 4 * single_wall_width * idler_bearing[3];
+//radius of the idler assembly (to smooth side of belt)
+function idler_assy_r_outer(idler_bearing) = (idler_bearing[0] / 2) + (idler_bearing[3] ? (5.5 * idler_bearing[3]) : 3);
+
+
+module idler_assy(idler_bearing = [22, 7, 8, 1]) {
+
+ translate([0,0,-1]) cylinder(h = 120, r=(idler_bearing[2] + 1) / 2, $fn=7, center=true);
+ //bearing shadow
+ %cylinder(h = idler_bearing[1], r=idler_bearing[0]/2, center=true);
+
+ cylinder(h = idler_width + 1, r=idler_assy_r_outer(idler_bearing) + 0.5, center=true);
+}
+
+module belt(len, side = 0){
+ //belt. To be substracted from model
+ //len is in +Z, smooth side in +X, Y centered
+ translate([-0.5, 0, 0]) maketeeth(len);
+ translate([0, -4.5, -0.01]) cube([belt_thickness, 9, len + 0.02]);
+ if (side != 0) {
+ translate([0, -4.5 + side, -0.01]) cube_fillet([belt_thickness, 9, len + 0.02], vertical = [3, 0, 0, 0]);
+ }
+}
+
+
+module maketeeth(len){
+ //Belt teeth.
+ for (i = [0 : len / belt_tooth_distance]) {
+ translate([0, 0, i * belt_tooth_distance]) cube([2, 9, belt_tooth_distance * belt_tooth_ratio], center = true);
+ }
+}