// super simple canister // 2018 Clinton Ebadi // incense sticks are ~22cm // add a few cm in cap for packaging inner_d = 25; inner_h = 215; cap_inner_h = 35; // height inside of cap, above rim of the canister cap_overlap = 10; cap_tolerance = 0.3; wall = 2; base = 2; sides = 7; // calculated outer_d = inner_d + wall*2; outer_h = inner_h + base; cap_outer_d = outer_d + wall*2 + cap_tolerance; cap_outer_h = cap_inner_h + cap_overlap + base; cap_bump_size = 0.75; cap_bump_h = 3; cap_bump_offset = 3; echo (cap_bump_offset); // other asserts, if I care enough... //assert (cap_inner_h > cap_overlap); //assert (cap_outer_h - cap_bump_offset > base); //$fa = 0.1; //$fs = 0.1; canister_base (); translate ([cap_outer_d + 1, 0, 0]) canister_cap (); //#translate ([0, 0, outer_h + cap_inner_h + base]) rotate ([0, 180, 180]) canister_cap (); //cap_bump (); module cap_bump (cap_bump_size=cap_bump_size, cap_bump_h=cap_bump_h) { cap_bump_d = outer_d+cap_bump_size/2; hull () { translate ([0, 0, 0]) cylinder (d = cap_bump_d, h = cap_bump_h/3, $fn = sides); translate ([0, 0, cap_bump_h/3]) cylinder (d = cap_bump_d + cap_bump_size, h = cap_bump_h/3, $fn = sides); translate ([0, 0, cap_bump_h/3*2]) cylinder (d = cap_bump_d, h = cap_bump_h/3, $fn = sides); } } module canister_base () { difference () { union () { cylinder (d = outer_d, h = outer_h, $fn = sides); translate ([0, 0, outer_h - cap_overlap + cap_bump_offset]) cap_bump (); translate ([0, 0, outer_h - cap_overlap - cap_bump_h - 0.2]) cap_bump (cap_bump_size = wall); } translate ([0, 0, base]) cylinder (d = inner_d, h = outer_h + 1, $fn = sides); } } module canister_cap () { tolerance_pct = 1.00; difference () { cylinder (d = cap_outer_d, h = cap_outer_h, $fn = sides); translate ([0, 0, base]) cylinder (d = outer_d + cap_tolerance, h = cap_outer_h+1, $fn = sides); 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 (); } }