btt-tft35-cover.scad

   1 eps = 0.01;
   2 infty = 200;
   3 wall = 1.5;
   4
   5 body_h = 87 + 2 + 2*wall;
   6 body_w = 93 + 2 + 2*wall;
   7
   8 screen_w = 75.5;
   9 screen_h = 51;
  10
  11 screw_hd = 88;
  12 screw_vd = 65;
  13
  14 screw_off = 3.5 + wall;
  15 screw_d = 3;
  16 screw_support_d = 9;
  17
  18 screw_to_disp_x = 5;
  19 screw_to_disp_y = 6.5;
  20
  21 screen_to_screw_z = 8;
  22
  23 screw_to_reset_y = 12.5+screw_vd;
  24 reset_button_d = 10;
  25 reset_lever_w = 30;
  26 reset_lever_h = reset_button_d/2;
  27
  28 screw_to_dial_x = 75;
  29 screw_to_dial_y = 10+screw_vd;
  30 dial_hole_d = 7;
  31
  32
  33 body_z = 20 + wall;
  34 difference() {
  35         cube([body_w, body_h, body_z]);
  36         difference() { // inner space w/o screw supports
  37                 translate([wall, wall, wall])
  38                         cube([body_w-2*wall, body_h-2*wall, body_z]);
  39                 for (x = [0, 1]) for (y = [0, 1])
  40                         translate([screw_off + x*screw_hd,
  41                                 screw_off + y*screw_vd, -eps])
  42                         cylinder (r = screw_support_d/2, h = screen_to_screw_z + 2*eps);
  43         }
  44         // screen hole
  45         hull() {
  46                 translate([screw_off + screw_to_disp_x,
  47                         screw_off + screw_to_disp_y, wall])
  48                         cube([screen_w, screen_h, eps]);
  49                 translate([screw_off + screw_to_disp_x - wall/2,
  50                         screw_off + screw_to_disp_y - wall/2, -eps])
  51                         cube([screen_w+wall, screen_h+wall, eps]);
  52         }
  53         // screw holes
  54         for (x = [0, 1]) for (y = [0, 1])
  55         translate([screw_off + x*screw_hd, screw_off + y*screw_vd, -eps])
  56                 cylinder (r = screw_d/2, h = body_z + 2*eps);
  57         // dial hole
  58         translate([screw_off + screw_to_dial_x,
  59                 screw_off + screw_to_dial_y, -eps])
  60                 cylinder(r = dial_hole_d/2, h = wall + 2*eps);
  61
  62         // reset_button
  63         translate([screw_off + screw_hd/2, screw_off + screw_to_reset_y, -eps])
  64         difference() {
  65                 union() {
  66                         cylinder(r = reset_button_d/2+wall, h = wall + 2*eps);
  67                         translate([-reset_lever_w, -reset_lever_h/2-wall, 0])
  68                                 cube([reset_lever_w, reset_lever_h + 2*wall, wall + 2*eps]);
  69                 }
  70                 translate([0, 0, -eps])
  71                 cylinder(r = reset_button_d/2, h = wall + 4*eps);
  72                 translate([-reset_lever_w-eps, -reset_lever_h/2, -eps])
  73                                 cube([reset_lever_w, reset_lever_h, wall + 4*eps]);
  74         }
  75 }