new base design for concrete insert
haldean
2 years ago
| 0 | 0 | include <dims.scad> |
| 1 | 1 | |
| 2 | sleeve_h = 150; | |
| 3 | channel_h = cap_depth; | |
| 4 | base_wall = 10; | |
| 5 | standoff_height = 50; | |
| 2 | bid = 149; | |
| 3 | bod = 7.75 * 25.4; | |
| 4 | bh = 200; | |
| 5 | taper = 20; | |
| 6 | top_thick = 25.4 * 2; | |
| 7 | armw = 50; | |
| 8 | armh = 15; | |
| 9 | armnotch = 5; | |
| 10 | arms = 3; | |
| 6 | 11 | otod_pad = 1.8; |
| 7 | neg_h = sleeve_h + 10; | |
| 8 | base_r = 200; | |
| 9 | base_thick = 30; | |
| 10 | tongue_w = otod + 50; | |
| 11 | 12 | |
| 12 | module negative() { | |
| 13 | module shell() { | |
| 13 | 14 | difference() { |
| 14 | translate([-250 - eps, -250 - eps, -10]) | |
| 15 | cube([500 + 2 * eps, 500 + 2 * eps, neg_h + 10]); | |
| 16 | cylinder(h=neg_h + eps, r=base_r); | |
| 17 | } | |
| 18 | difference() { | |
| 19 | cylinder(h=neg_h, r=(otod + otod_pad) / 2); | |
| 20 | for (i = [0 : 1]) { | |
| 21 | rotate([0, 0, 90 + 180 * i]) { | |
| 22 | translate([-(otod + otod_pad) / 2, -base_wall/2, -eps]) union() { | |
| 23 | cube([base_wall, base_wall, standoff_height]); | |
| 24 | } | |
| 25 | } | |
| 26 | } | |
| 27 | } | |
| 28 | difference() { | |
| 29 | cylinder(h=sleeve_h - base_thick, r=base_r - base_thick); | |
| 30 | translate([-tongue_w / 2, -otod, -eps]) cube([tongue_w, base_r + otod, base_thick]); | |
| 15 | cylinder(h=bh, r1=bod/2, r2=bod/2-taper); | |
| 16 | translate([0, 0, -2*eps]) cylinder(h=bh - top_thick, r=bid/2); | |
| 31 | 17 | } |
| 32 | 18 | } |
| 33 | 19 | |
| 34 | 20 | difference() { |
| 35 | translate([-250, -250, eps]) cube([500, 500, sleeve_h]); | |
| 36 | negative(); | |
| 37 | }⏎ | |
| 21 | union() { | |
| 22 | intersection() { | |
| 23 | for (i = [0 : arms-1]) { | |
| 24 | rotate([0, 0, i * 360/arms]) { | |
| 25 | difference() { | |
| 26 | translate([-armw/2, 0, -armh + armnotch]) cube([armw, bod/2, armh]); | |
| 27 | for (i = [2 : 5]) | |
| 28 | translate([i % 2 == 0 ? 6 : -6, (i+4.5) * (bid/22), -armh]) | |
| 29 | cylinder(h=2*armh, r=3.5); | |
| 30 | } | |
| 31 | } | |
| 32 | } | |
| 33 | translate([0, 0, -2 * armh + armnotch]) cylinder(h=armh * 2, r=bod/2-1); | |
| 34 | } | |
| 35 | translate([0, 0, -armh + armnotch]) { | |
| 36 | difference() { | |
| 37 | cylinder(h=armh*2, r=otod/2+wall_thickness + otod_pad); | |
| 38 | translate([0, 0, armh + 2*eps]) cylinder(h=armh + 2*eps, r=(otod + otod_pad)/2); | |
| 39 | translate([-channel_w/2, 0, armh+2*eps]) cube([channel_w, otod+eps, armh]); | |
| 40 | } | |
| 41 | } | |
| 42 | } | |
| 43 | shell(); | |
| 44 | } | |
| 45 |