etc/canister.scad

   1 // super simple canister
   2 // 2018 Clinton Ebadi
   3
   4 // incense sticks are ~22cm
   5 // add a few cm in cap for packaging
   6
   7 inner_d = 25;
   8 inner_h = 215;
   9 cap_inner_h = 35; // height inside of cap, above rim of the canister
  10 cap_overlap = 10;
  11 cap_tolerance = 0.3;
  12
  13 wall = 2;
  14 base = 2;
  15 sides = 7;
  16
  17
  18 // calculated
  19 outer_d = inner_d + wall*2;
  20 outer_h = inner_h + base;
  21
  22 cap_outer_d = outer_d + wall*2 + cap_tolerance;
  23 cap_outer_h = cap_inner_h + cap_overlap + base;
  24
  25 cap_bump_size = 0.75;
  26 cap_bump_h = 3;
  27 cap_bump_offset = 3;
  28
  29 echo (cap_bump_offset);
  30
  31
  32 // other asserts, if I care enough...
  33 //assert (cap_inner_h > cap_overlap);
  34 //assert (cap_outer_h - cap_bump_offset > base);
  35
  36
  37 //$fa = 0.1;
  38 //$fs = 0.1;
  39
  40 canister_base ();
  41 translate ([cap_outer_d + 1, 0, 0]) canister_cap ();
  42 //#translate ([0, 0, outer_h + cap_inner_h + base]) rotate ([0, 180, 180]) canister_cap ();
  43
  44 //cap_bump ();
  45
  46 module cap_bump (cap_bump_size=cap_bump_size, cap_bump_h=cap_bump_h) {
  47      cap_bump_d = outer_d+cap_bump_size/2;
  48      hull () {
  49           translate ([0, 0, 0])
  50                cylinder (d = cap_bump_d, h = cap_bump_h/3, $fn = sides);
  51           translate ([0, 0, cap_bump_h/3])
  52                cylinder (d = cap_bump_d + cap_bump_size, h = cap_bump_h/3, $fn = sides);
  53           translate ([0, 0, cap_bump_h/3*2])
  54                cylinder (d = cap_bump_d, h = cap_bump_h/3, $fn = sides);
  55      }
  56 }
  57
  58 module canister_base () {
  59      difference () {
  60           union () {
  61                cylinder (d = outer_d, h = outer_h, $fn = sides);
  62                translate ([0, 0, outer_h - cap_overlap + cap_bump_offset]) cap_bump ();
  63                translate ([0, 0, outer_h - cap_overlap - cap_bump_h - 0.2]) cap_bump (cap_bump_size = wall);
  64           }
  65           translate ([0, 0, base]) cylinder (d = inner_d, h = outer_h + 1, $fn = sides);
  66      }
  67 }
  68
  69 module canister_cap () {
  70      tolerance_pct = 1.00;
  71      difference () {
  72           cylinder (d = cap_outer_d, h = cap_outer_h, $fn = sides);
  73           translate ([0, 0, base]) cylinder (d = outer_d + cap_tolerance, h = cap_outer_h+1, $fn = sides);
  74           translate ([0, 0, cap_outer_h - cap_bump_offset - cap_bump_h]) scale ([tolerance_pct, tolerance_pct, tolerance_pct]) rotate ([0, 0, 0]) cap_bump ();
  75      }
  76 }