// egress_w = 8.0;
wall_y_min = -board_l - side_wall_th; // XXXX remove
-main_y_min = -board_l - side_wall_th;
ceil_y_min = wall_y_min - 5;;
small_walls = [
strain_groove_d = 2;
strain_groove_w = 3;
+cover_strap_c_d_y = 5.5; // from front of board
+cover_registration_sz_y = 2;
+cover_registration_sz_z = 3;
+
cable_space_z = 6;
cable_dia = 5;
bottom_floor_th = 1.5;
fit_gap_z = 0.5;
+fit_gap_y = 0.25;
side_x_gap = 0.5;
cover_ceil_th = 0.9;
+cover_strap_sz_x = side_wall_th * 3.5;
+
// calculated
+strap_w = strain_w;
+strap_cutout_z = side_wall_th;
+
top_top_z = usb_wall_h;
top_base_z = -board_th;
bottom_base_z = top_base_z - cable_space_z - bottom_floor_th;;
front_y_max = front_wall_th;
+main_y_min = -board_l - side_wall_th;
strain_0_y_c = main_y_min - strain_w/2;
strain_1_y_c = strain_0_y_c - strain_pitch_along;
top_side_wall_x = +board_w/2 + side_wall_th;
total_side_wall_x = top_side_wall_x + side_wall_th + side_x_gap;
+cover_registration_c_dy = -cover_strap_c_d_y - strap_w/2
+ - side_wall_th - cover_registration_sz_y/2;
+
module BothSides(){
for (m=[0,1]) {
- mirror([m,0]) {
+ mirror([m,0,0]) {
children();
}
}
}
+module StrapCutouts(y_c, z_top, top_sz_x){
+ for (z = [ bottom_base_z, z_top ]) {
+ BothSides(){
+ translate([ -total_side_wall_x, y_c, z_top ]) {
+ cube([ top_sz_x*2,
+ strap_w,
+ strap_cutout_z*2 ],
+ center=true);
+ }
+ }
+ }
+}
+
+module CoverStrapCutouts(){
+ StrapCutouts( -cover_strap_c_d_y, cover_top_z, cover_strap_sz_x );
+}
+
module FrontWallsPlan(slop) {
BothSides(){
rectfromto([ -board_w/2 - side_wall_th, 0 ],
[ +board_w/2 + side_wall_th, total_y_min ]);
}
+module CoverRegistrations(){
+ linextr_y_xz(cover_registration_c_dy - strap_w/2,
+ cover_registration_c_dy + strap_w/2) {
+ difference(){
+ rectfromto([ -total_side_wall_x,
+ cover_wall_bot_z - cover_registration_sz_z ],
+ [ +total_side_wall_x, cover_top_z ]);
+ hull(){
+ TopElevationForCutout();
+ translate([0, -20]) TopElevationForCutout();
+ }
+ }
+ }
+}
+
module Top(){ ////toplevel
difference(){
union(){
TopCeilPlan();
linextr(-board_th, usb_wall_h)
TopMainWallsPlan();
+ BothSides()
+ linextr(cover_wall_bot_z, top_top_z)
+ rectfromto([ -(board_w/2 + 0.1), total_y_min ],
+ [ -total_side_wall_x, main_y_min - fit_gap_y ]);
}
for (y_c = [strain_0_y_c, strain_1_y_c]) {
}
}
}
+ minkowski(){
+ CoverRegistrations();
+ cube([ 1, fit_gap_y*2, fit_gap_z*2 ], center=true);
+ }
}
}
}
}
module Cover(){ ////toplevel
- linextr_y_xz(main_y_min, front_y_max)
- CoverMainElevation();
+ difference(){
+ union(){
+ linextr_y_xz(main_y_min, front_y_max)
+ CoverMainElevation();
+ CoverRegistrations();
+ }
+ CoverStrapCutouts();
+ }
}
module BottomDemo(){ ////toplevel