Initial disk and reader

holodisk.scad

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+// dependency: https://github.com/revarbat/BOSL
+use <BOSL/transforms.scad>
+use <BOSL/metric_screws.scad>
+use <BOSL/masks.scad>
+
+include <tape.scad>
+
+module frame() {
+    tr=top_rim;
+    tc=tr*1.5;
+    fbd=front_body_depth;
+    bbr=back_bumpers_radius;
+    
+    module back_bumpers() {
+        module bumper() { back_half() circle(r=bbr); }
+        back(depth) {
+            right(bbr) bumper();
+            right(width-bbr) bumper();
+        }
+    }
+    
+    module bolt() { metric_bolt(size=back_bumpers_bolt_size, headtype=bolt_headtype, l=height, pitch=0); }
+        module nut() { metric_nut(size=back_bumpers_bolt_size, pitch=0); }
+        
+    module back_bolts() {
+        back(depth) {
+            right(bbr) {
+                up(height) bolt();
+                nut();
+            }
+            right(width-bbr) {
+                up(height) bolt();
+                nut();
+            }
+        }
+    }
+    
+    module front_bolts() { 
+        bolt_offset=front_body_bolt_offset;
+        back(front_body_depth/2) {
+            right(bolt_offset) {
+                up(height) bolt();
+                nut();
+            }
+            right(width-bolt_offset) {
+                up(height) bolt();
+                nut();
+            }
+        }
+    }
+
+    module top_cover() {
+      up(height-plate) linear_extrude(height=plate) {
+        back_bumpers();
+        polygon(points=[
+                // frame
+                [0, 0], [0, depth],
+                [width, depth], [width, 0],
+                // window
+                [tr, tr+fbd], [tr, depth-tr-tc], [tr+tc, depth-tr],
+                [width-tr-tc, depth-tr], [width-tr, depth-tr-tc], [width-tr, tr+fbd]
+            ],
+            paths=[
+                [0,1,2,3], [4,5,6,7,8,9]
+            ]);
+        }
+    }
+    
+    module walls() {
+        walls_height=height-plate*2;
+        up(plate) linear_extrude(height=walls_height) {
+            //back_bumpers();
+            shell2d(thickness=-wall) {
+                square([width, depth]);
+            }
+        }
+    }
+    
+    module bottom_cover() {
+        linear_extrude(height=plate) {
+            back_bumpers();
+            square([width, depth]);
+        }
+    }
+    
+    color("SaddleBrown") top_cover();
+    color("grey") walls();
+    color("SaddleBrown") bottom_cover();
+    color("silver") back_bolts();
+    color("silver") front_bolts();
+}
+
+module mechanism() {
+    module spool(r_in, r_out, in_rim, out_rim) {
+        module spindle(d, h) {
+            color("Sienna") cylinder(h=h, d=d);
+        }
+            
+        module spool_plate() {
+            difference() {
+                cylinder(h=spool_plate_height, r=r_out);
+                if (!$preview && r_out - r_in > out_rim) {
+                    angle=spool_plate_hole_angle;
+                    difference() {
+                        for (i = [1:spool_plate_holes]) {
+                            zrot(360/spool_plate_holes * i) {
+                                angle_pie_mask(r=r_out - out_rim, l=spool_plate_height, ang=angle, center=false);
+                            }
+                        }
+                        cylinder(h=spool_plate_height, r=r_in + in_rim);
+                    }
+                }
+            }
+        }
+        
+        spindle_h=height-plate;
+        difference() {
+            color("Azure") {
+                spool_plate();
+                up(spool_plate_height) cylinder(h=spool_inner_height, r=r_in);
+                up(spool_plate_height + spool_inner_height) spool_plate();
+            }
+            up(spool_plate_height + spool_inner_height/2) cube([r_in*2, spool_slit_depth, spool_inner_height], center=true);
+            // TODO: spindle height
+            spindle(d=spindle_diam+spindle_diam_tolerance, h=spindle_h);
+        }
+        spindle(d=spindle_diam, h=spindle_h);
+    }
+    
+    module main_spool() {
+        spool(r_in=spool_inner_radius,
+            r_out=spool_outer_radius,
+            in_rim=spool_plate_hole_inner_rim,
+            out_rim=spool_plate_hole_outer_rim);
+    }
+    module aux_spool() {
+        spool(r_in=middle_spool_in_r, r_out=middle_spool_out_r,
+            in_rim=aux_spool_plate_hole_inner_rim,
+            out_rim=aux_spool_plate_hole_outer_rim);
+    }
+    
+    module spools() {
+        up(plate) {
+            right(main_spools_x) {
+                back(spool1_depth) main_spool();
+                back(spool2_depth) main_spool();
+            }
+            right(aux_spools_right_x) {
+                back(spool3_depth) aux_spool();
+                back(spool4_depth) aux_spool();
+            }
+            right(aux_spools_left_x) {
+                back(spool4_depth) aux_spool();
+            }
+        }
+    }
+    
+    module tapes() {
+        spool1_tape_r = spool_outer_radius * 0.8;
+        spool2_tape_r = spool_outer_radius * 0.5;
+        up(plate + spool_plate_height) {
+            // main spools
+            right(main_spools_x) {
+               back(spool1_depth) tape_spool(r_in=spool_inner_radius, r_out=spool1_tape_r);
+               back(spool2_depth) tape_spool(r_in=spool_inner_radius, r_out=spool2_tape_r);
+            }
+            // TODO: convert to path
+            // main 1 --> middle
+            tape([main_spools_x + spool1_tape_r, spool1_depth, 0], [aux_spools_right_x + middle_spool_in_r, spool3_depth, 0]);
+            // --> right corner
+            right(aux_spools_right_x + middle_spool_in_r) tape([0, spool3_depth, 0], [0, spool4_depth, 0]);
+            // --> left corner
+            tape([aux_spools_left_x, spool4_depth - middle_spool_in_r, 0], [aux_spools_right_x, spool4_depth - middle_spool_in_r, 0]);
+            // --> main 2
+            tape([aux_spools_left_x - middle_spool_in_r, spool4_depth, 0], [main_spools_x - spool2_tape_r, spool2_depth, 0]);
+        }
+    }
+    
+    spools();
+    tapes();
+}
+
+module holodisk() {
+    #frame();
+    mechanism();
+}
+
+holodisk();