6 lid_thinboxbase_overlap = 5;
7 lid_fatbox_overlap = 12;
11 lid_fatbox_switches_h = 6+2;
13 lid_max_switches_w = 70;
14 lid_switches_y_slop = 3;
39 lid_rail_behindslop = 0.5;
44 lid_thinboxbase_overlap + lid_fatbox_h + lid_fatbox_switches_h;
45 lid_inner_min_h = lid_fatbox_overlap + lid_fatbox_switches_h;
47 lid_inner_kink = [thinbox_len, thinbox_len*2];
49 lid_inner_w_nom = patbox_side;
50 lid_inner_w = lid_inner_w_nom + lid_side_slop * 2;
52 lid_seatline_w = (lid_inner_w - lid_max_switches_w)/2 - lid_switches_y_slop;
54 lid_seatline_h = lid_fatbox_switches_h;
58 peg_main_height = peg_straight_len + (peg_max_dia - peg_main_dia)/2/peg_slope;
60 echo(peg_main_height);
62 thinbox_front_z = lid_fatbox_switches_h + lid_fatbox_h - lid_thinbox_h;
64 raillen = patbox_side/2 + rail_overlap;
66 module LidSideProfile(){
67 polygon([[-lid_top_wall, lid_inner_max_h],
68 [lid_inner_kink[0], lid_inner_max_h],
69 [lid_inner_kink[1], lid_inner_min_h],
70 [total_len, lid_inner_min_h],
71 [total_len, -lid_front_wall],
72 [-lid_top_wall, -lid_front_wall]]);
75 module RailProfile(lslop=0.1){
76 yt_base = thinbox_front_z;
77 yt = yt_base - lid_rail_behindslop;
78 pegx = (lid_inner_w_nom - patbox_centres)/2;
80 polygon([[-lslop, yt],
81 [pegx - peg_main_dia/2, yt],
82 [pegx - peg_main_dia/2, yt_base - peg_straight_len],
84 yt_base - peg_straight_len - (pegx - peg_main_dia/2)/peg_slope
89 overlap = [0.1, 0.1, 0.1];
93 linear_extrude(height= lid_side_wall)
98 cube(overlap + [total_len, lid_seatline_w, lid_seatline_h]);
101 translate([-0.1, -0.1, -lid_front_wall])
102 cube([total_len+0.1, lid_inner_w/2 + 0.2, lid_front_wall]);
105 translate([-lid_top_wall, -lid_side_wall, -lid_front_wall])
106 cube([lid_top_wall, lid_inner_w/2 + 10, lid_front_wall + lid_inner_max_h]);
110 translate([0,0,-0.1])
111 linear_extrude(height=raillen+0.1) //todo
115 translate([raillen, 0,0])
117 rotate_extrude($fn=50)
118 RailProfile(lslop=0);
119 translate([0, 25-0.1, 0])
120 cube(50, center=true);
124 module Lid(){ ////toplevel
127 translate([0, -lid_inner_w/2, 0]) LidSide();
131 polygon([[-peg_engage_depth, (peg_engage_dia - peg_outer_slop)/2],
132 [0, (peg_engage_dia - peg_outer_slop)/2],
133 [0, (peg_main_dia - peg_outer_slop)/2],
134 [peg_straight_len, (peg_main_dia - peg_outer_slop)/2],
135 [peg_main_height, (peg_max_dia - peg_outer_slop)/2],
136 [peg_main_height+peg_top_thick, (peg_max_dia - peg_outer_slop)/2],
137 [peg_main_height+peg_top_thick, (peg_inner_dia + peg_inner_slop)/2],
138 [-peg_engage_depth, (peg_inner_dia + peg_inner_slop)/2]]);
141 module Peg(){ ////toplevel
142 rotate_extrude($fn=50)
147 module AtFixingCentres(){
149 translate([patbox_side/2 + fc*patbox_centres/2,
156 module TopPattressBox(){
158 translate([0,0, -lid_thinbox_h])
159 cube([patbox_side, patbox_side, lid_thinbox_h]);
161 translate([0,0,-10]) cylinder(r=peg_engage_dia/2, h=20);
168 translate([0,0, thinbox_front_z])
169 rotate([0,180,0]) translate([0, -patbox_side/2, 0])
170 rotate([0,0,90]) union(){
172 color("blue") AtFixingCentres(){
173 rotate([180,0,0]) Peg();