1 | |
---|
2 | length = 4.25; |
---|
3 | width = 0.96; |
---|
4 | bar_slot_diameter = 0.190; |
---|
5 | slot_to_surface = 0.165; |
---|
6 | slab_thickness = 0.132; |
---|
7 | slab_end_thickness = 0.190; |
---|
8 | slab_end_depth = 0.077; |
---|
9 | slot_support_height = 0.425; |
---|
10 | slot_support_length = 2.065; |
---|
11 | slot_support_face = 0.450; |
---|
12 | slot_support_width = 0.547; |
---|
13 | slot_support_side_thickness = 1/16; |
---|
14 | slot_support_inner_width = slot_support_width - 2*slot_support_side_thickness; |
---|
15 | |
---|
16 | cut_margin = 0.0001; |
---|
17 | |
---|
18 | module seesaw() { |
---|
19 | difference() { |
---|
20 | union() { |
---|
21 | // main slab |
---|
22 | translate([-length/2, 0, 0]) { |
---|
23 | cube([length, width, slab_thickness]); |
---|
24 | } |
---|
25 | // slot support |
---|
26 | hull() { |
---|
27 | translate([-slot_support_face/2, (width-slot_support_width)/2, 0]) { |
---|
28 | cube([slot_support_face, slot_support_width, slot_support_height]); |
---|
29 | } |
---|
30 | translate([-slot_support_length/2, (width-slot_support_width)/2, 0]) { |
---|
31 | cube([slot_support_length, slot_support_width, slab_thickness]); |
---|
32 | } |
---|
33 | } |
---|
34 | // ends |
---|
35 | translate([length/2-slab_end_depth, 0, 0]) { |
---|
36 | cube([slab_end_depth , width, slab_end_thickness]); |
---|
37 | } |
---|
38 | translate([-length/2, 0, 0]) { |
---|
39 | cube([slab_end_depth , width, slab_end_thickness]); |
---|
40 | } |
---|
41 | } |
---|
42 | union() { |
---|
43 | // turn the support into a pair of walls |
---|
44 | translate([-slot_support_length/2, (width-slot_support_inner_width)/2, slab_thickness]) { |
---|
45 | cube([slot_support_length, slot_support_inner_width, slot_support_height-slab_thickness+cut_margin]); |
---|
46 | } |
---|
47 | // straight part of the slot the bar passses by |
---|
48 | translate([-bar_slot_diameter/2, -cut_margin, slot_support_height + slot_to_surface + bar_slot_diameter/2]) { |
---|
49 | rotate([-90, 0, 0]) { |
---|
50 | cube([bar_slot_diameter, slot_support_height, width+2*cut_margin]); |
---|
51 | } |
---|
52 | } |
---|
53 | // round part of the slot that rests on the bar |
---|
54 | translate([0, 0, slot_to_surface + bar_slot_diameter/2]) { |
---|
55 | rotate([-90, 0, 0]) { |
---|
56 | cylinder(d=bar_slot_diameter, h=width+2*cut_margin, $fn=64); |
---|
57 | } |
---|
58 | } |
---|
59 | } |
---|
60 | } |
---|
61 | } |
---|
62 | |
---|
63 | seesaw(); |
---|