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 $peg_outer_slop = -0.9;
39 lid_rail_behindslop = 0.5;
40 lid_rail_strongwall = 2.5;
45 lid_thinboxbase_overlap + lid_fatbox_h + lid_fatbox_switches_h;
46 lid_inner_min_h = lid_fatbox_overlap + lid_fatbox_switches_h;
48 lid_inner_kink = [thinbox_len, thinbox_len*2];
50 lid_inner_w_nom = patbox_side;
51 lid_inner_w = lid_inner_w_nom + lid_side_slop * 2;
53 lid_seatline_w = (lid_inner_w - lid_max_switches_w)/2 - lid_switches_y_slop;
55 lid_seatline_h = lid_fatbox_switches_h;
57 peg_main_height = peg_straight_len + (peg_max_dia - peg_main_dia)/2/peg_slope;
59 thinbox_front_z = lid_fatbox_switches_h + lid_fatbox_h - lid_thinbox_h;
61 raillen = patbox_side/2 + rail_overlap;
63 module LidSideProfile(){
64 polygon([[-lid_top_wall, lid_inner_max_h],
65 [min(lid_inner_kink[0],total_len), lid_inner_max_h],
66 [min(lid_inner_kink[1],total_len), lid_inner_min_h],
67 [total_len, lid_inner_min_h],
68 [total_len, -lid_front_wall],
69 [-lid_top_wall, -lid_front_wall]]);
72 module RailProfile(lslop=0.1){
73 yt_base = thinbox_front_z;
74 yt = yt_base - lid_rail_behindslop;
75 pegx = (lid_inner_w_nom - patbox_centres)/2;
76 sw = lid_rail_strongwall;
78 polygon([[-lslop, yt],
79 [pegx - peg_main_dia/2, yt],
80 [pegx - peg_main_dia/2, yt_base - peg_straight_len],
82 yt_base - peg_straight_len - (pegx - peg_main_dia/2)/peg_slope
87 lid_seatline_h - 1]]);
91 overlap = [0.1, 0.1, 0.1];
95 linear_extrude(height= lid_side_wall)
100 cube(overlap + [total_len, lid_seatline_w, lid_seatline_h]);
103 translate([-0.1, -0.1, -lid_front_wall])
104 cube([total_len+0.1, lid_inner_w/2 + 0.2, lid_front_wall]);
107 translate([-lid_top_wall, -lid_side_wall, -lid_front_wall])
108 cube([lid_top_wall, lid_inner_w/2 + 10, lid_front_wall + lid_inner_max_h]);
112 translate([0,0,-0.1])
113 linear_extrude(height=raillen+0.1) //todo
117 translate([raillen, 0,0])
119 rotate_extrude($fn=50)
120 RailProfile(lslop=0);
121 translate([0, 25-0.1, 0])
122 cube(50, center=true);
126 module Lid(){ ////toplevel
129 translate([0, -lid_inner_w/2, 0]) LidSide();
133 polygon([[-peg_engage_depth, (peg_engage_dia - $peg_outer_slop)/2],
134 [0, (peg_engage_dia - $peg_outer_slop)/2],
135 [0, (peg_main_dia - $peg_outer_slop)/2],
136 [peg_straight_len, (peg_main_dia - $peg_outer_slop)/2],
137 [peg_main_height, (peg_max_dia - $peg_outer_slop)/2],
138 [peg_main_height+peg_top_thick, (peg_max_dia - $peg_outer_slop)/2],
139 [peg_main_height+peg_top_thick, (peg_inner_dia + $peg_inner_slop)/2],
140 [-peg_engage_depth, (peg_inner_dia + $peg_inner_slop)/2]]);
143 module Peg(){ ////toplevel
144 echo($peg_outer_slop);
145 rotate_extrude($fn=50)
150 module Pegs(){ ////toplevel
152 dslops = [0, -0.5, -1.0, -1.5];
153 stride = peg_max_dia + 4;
154 for (i=[0:len(dslops)-1]) {
155 translate([i*stride,0,0])
156 assign($peg_outer_slop= baseslop + dslops[i])
161 module AtFixingCentres(){
163 translate([patbox_side/2 + fc*patbox_centres/2,
170 module TopPattressBox(){
172 translate([0,0, -lid_thinbox_h])
173 cube([patbox_side, patbox_side, lid_thinbox_h]);
175 translate([0,0,-10]) cylinder(r=peg_engage_dia/2, h=20);
182 translate([0,0, thinbox_front_z])
183 rotate([0,180,0]) translate([0, -patbox_side/2, 0])
184 rotate([0,0,90]) union(){
186 color("blue") AtFixingCentres(){
187 rotate([180,0,0]) Peg();