From: Clinton Ebadi <clinton@unknownlamer.org>
Date: Sat, 1 Dec 2018 00:02:30 +0000 (-0500)
Subject: etc: some simple canister i made a while ago
X-Git-Url: http://git.hcoop.net/clinton/3d-models.git/commitdiff_plain/acf52db58e2cbf2eb0ca58f595e1da3786265dbb?hp=a8b3811abc4c5231e8e58676f30533266aebedb9

etc: some simple canister i made a while ago

works ok in semiflex, top pops on and off.
---

diff --git a/etc/canister.scad b/etc/canister.scad
new file mode 100644
index 0000000..7578dbc
--- /dev/null
+++ b/etc/canister.scad
@@ -0,0 +1,107 @@
+// super simple canister
+// 2018 Clinton Ebadi
+
+inner_d = 20;
+inner_h = 20;
+cap_inner_h = 12;
+cap_overlap = 10;
+cap_tolerance = 0.5;
+
+wall = 2;
+base = 1;
+sides = 6;
+
+
+// calculated
+outer_d = inner_d + wall*2;
+outer_h = inner_h + wall - cap_inner_h + cap_overlap;
+
+cap_outer_d = outer_d + wall*2;
+cap_outer_h = cap_inner_h + base;
+
+cap_bump_size = wall/2;
+cap_bump_h = cap_bump_size * 2;
+cap_bump_offset = cap_bump_h + 2;
+
+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 ();
+
+//cap_bump ();
+
+// inner
+/* module cap_bump () { */
+/*      $fn = sides; */
+/*      cap_bump_d = outer_d+cap_bump_size*2; */
+
+/*      difference () { */
+/* 	  circle (d=cap_bump_d); */
+/* 	  circle (d=outer_d); */
+/*      } */
+
+/*      /\* difference () { *\/ */
+/*      /\* 	  cylinder (h=cap_bump_h, d=cap_bump_d, center=true); *\/ */
+/*      /\* 	  cylinder (h=cap_bump_h+1, d=outer_d, center=true); *\/ */
+/*      /\* } *\/ */
+
+/*      /\* rotate_extrude () *\/ */
+/*      /\* union () { *\/ */
+/*      /\* 	  translate ([cap_bump_d/2, 0, 0]) *\/ */
+/*      /\* 	       rotate ([0, 180, 0]) circle (cap_bump_size, $fn=3); *\/ */
+/*      /\* } *\/ */
+/* } */
+
+module cap_bump () {
+     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);
+     }
+     /* 	       cylinder (d = cap_bump_d + cap_bump_size, h = cap_bump_h, $fn = sides); */
+     /* 	       translate ([0, 0, -cap_bump_h]) cylinder (d = inner_d, h = cap_bump_h*2+0.1, $fn = sides); */
+     /* 	  } */
+     /* 	  sphere_d = (cap_bump_h+0.1); */
+     /* 	  translate ([cap_bump_d/2-cap_bump_size, 0, cap_bump_h/2]) sphere (d = sphere_d); */
+     /* } */
+
+     /* minkowski () { */
+     /* 	  cylinder (d = outer_d, h = cap_bump_size*2, $fn = sides); */
+     /* 	  sphere (d = cap_bump_size); */
+     /* } */
+     /* rotate_extrude () { */
+     /* 	  translate ([inner_d/2, 0, 0]) circle (cap_bump_size); */
+     /* } */
+}
+
+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, base]) cylinder (d = inner_d, h = outer_h + 1, $fn = sides);
+     }
+}
+
+module canister_cap () {
+     tolerance_pct = 1.05;
+     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]) scale ([tolerance_pct, tolerance_pct, tolerance_pct]) cap_bump ();
+     }
+}