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;
33 $peg_inner_slop = 0.75;
34 $peg_outer_slop = 0.1;
39 lid_rail_behindslop = 0.5;
40 lid_rail_strongwall = 2.5;
45 lid_thinboxbase_overlap + lid_fatbox_h + lid_fatbox_switches_h;
46 lid_inner_min_h = lid_fatbox_overlap + lid_fatbox_switches_h;
48 lid_inner_kink = [thinbox_len, thinbox_len*2];
50 lid_inner_w_nom = patbox_side;
51 lid_inner_w = lid_inner_w_nom + lid_side_slop * 2;
53 lid_seatline_w = (lid_inner_w - lid_max_switches_w)/2 - lid_switches_y_slop;
55 lid_seatline_h = lid_fatbox_switches_h;
59 peg_main_height = peg_straight_len + (peg_max_dia - peg_main_dia)/2/peg_slope;
61 echo(peg_main_height);
63 thinbox_front_z = lid_fatbox_switches_h + lid_fatbox_h - lid_thinbox_h;
65 raillen = patbox_side/2 + rail_overlap;
67 module LidSideProfile(){
68 polygon([[-lid_top_wall, lid_inner_max_h],
69 [min(lid_inner_kink[0],total_len), lid_inner_max_h],
70 [min(lid_inner_kink[1],total_len), lid_inner_min_h],
71 [total_len, lid_inner_min_h],
72 [total_len, -lid_front_wall],
73 [-lid_top_wall, -lid_front_wall]]);
76 module RailProfile(lslop=0.1){
77 yt_base = thinbox_front_z;
78 yt = yt_base - lid_rail_behindslop;
79 pegx = (lid_inner_w_nom - patbox_centres)/2;
80 sw = lid_rail_strongwall;
82 polygon([[-lslop, yt],
83 [pegx - peg_main_dia/2, yt],
84 [pegx - peg_main_dia/2, yt_base - peg_straight_len],
86 yt_base - peg_straight_len - (pegx - peg_main_dia/2)/peg_slope
91 lid_seatline_h - 1]]);
95 overlap = [0.1, 0.1, 0.1];
99 linear_extrude(height= lid_side_wall)
104 cube(overlap + [total_len, lid_seatline_w, lid_seatline_h]);
107 translate([-0.1, -0.1, -lid_front_wall])
108 cube([total_len+0.1, lid_inner_w/2 + 0.2, lid_front_wall]);
111 translate([-lid_top_wall, -lid_side_wall, -lid_front_wall])
112 cube([lid_top_wall, lid_inner_w/2 + 10, lid_front_wall + lid_inner_max_h]);
116 translate([0,0,-0.1])
117 linear_extrude(height=raillen+0.1) //todo
121 translate([raillen, 0,0])
123 rotate_extrude($fn=50)
124 RailProfile(lslop=0);
125 translate([0, 25-0.1, 0])
126 cube(50, center=true);
130 module Lid(){ ////toplevel
133 translate([0, -lid_inner_w/2, 0]) LidSide();
137 polygon([[-peg_engage_depth, (peg_engage_dia - $peg_outer_slop)/2],
138 [0, (peg_engage_dia - $peg_outer_slop)/2],
139 [0, (peg_main_dia - $peg_outer_slop)/2],
140 [peg_straight_len, (peg_main_dia - $peg_outer_slop)/2],
141 [peg_main_height, (peg_max_dia - $peg_outer_slop)/2],
142 [peg_main_height+peg_top_thick, (peg_max_dia - $peg_outer_slop)/2],
143 [peg_main_height+peg_top_thick, (peg_inner_dia + $peg_inner_slop)/2],
144 [-peg_engage_depth, (peg_inner_dia + $peg_inner_slop)/2]]);
147 module Peg(){ ////toplevel
148 rotate_extrude($fn=50)
153 module AtFixingCentres(){
155 translate([patbox_side/2 + fc*patbox_centres/2,
162 module TopPattressBox(){
164 translate([0,0, -lid_thinbox_h])
165 cube([patbox_side, patbox_side, lid_thinbox_h]);
167 translate([0,0,-10]) cylinder(r=peg_engage_dia/2, h=20);
174 translate([0,0, thinbox_front_z])
175 rotate([0,180,0]) translate([0, -patbox_side/2, 0])
176 rotate([0,0,90]) union(){
178 color("blue") AtFixingCentres(){
179 rotate([180,0,0]) Peg();