refactor

rack/stackConnector.scad

@@ -0,0 +1,111 @@
+include <../helper/math.scad>
+include <../misc/magnet.scad>
+include <../helper/common.scad>
+
+connectorTaperStartHeight = 2;
+connectorRectWidth = 10;
+connectorRectDepth = 10;
+
+connectorTotalHeight = 5;
+
+connectorRectPlugSlack = -0.1;
+connectorRectSocketSlack = 0.1;
+
+connectorSocketMagnetExtrudeHeight = 1;
+
+module stackConnectorBase(rectSlack) {
+
+  _wSlacked = connectorRectWidth + rectSlack;
+  _dSlacked = connectorRectDepth + rectSlack;
+
+  module connRect() {
+    linear_extrude(height=eps)
+    square(size = [_wSlacked, _dSlacked]);
+  }
+
+  module connMagnetMount() {
+    linear_extrude(height=eps)
+    circle(r=magnetRSlacked);
+  }
+
+  hull() {
+    connRect();
+
+    translate(v=[0,0,connectorTaperStartHeight])
+    connRect();
+  }
+
+  hull() {
+    translate(v = [0, 0, connectorTaperStartHeight])
+    connRect();
+
+    translate(v=[_wSlacked/2, _dSlacked/2, connectorTotalHeight])
+    connMagnetMount();
+  }
+}
+
+module stackConnectorPlug() {
+  assert(magnetHSlacked > connectorSocketMagnetExtrudeHeight);
+
+  _wSlacked = connectorRectWidth + connectorRectPlugSlack;
+  _dSlacked = connectorRectDepth + connectorRectPlugSlack;
+
+  magnetLevelHeight = connectorTotalHeight - (magnetHSlacked - connectorSocketMagnetExtrudeHeight);
+
+  difference() {
+
+    intersection() {
+      stackConnectorBase(connectorRectPlugSlack);
+      cube(size=[_dSlacked, _wSlacked, magnetLevelHeight]);
+    }
+
+      translate(v = [_wSlacked/2, _dSlacked/2, magnetLevelHeight - magnetHSlacked])
+      cylinder(r = magnetRSlacked, h = magnetHSlacked);
+
+  }
+}
+
+module stackConnectorSocket_N() {
+
+  _wSlacked = connectorRectWidth + connectorRectSocketSlack;
+  _dSlacked = connectorRectDepth + connectorRectSocketSlack;
+
+  _bevelSlack = 0.5;
+  _bevelR = _wSlacked + _bevelSlack;
+  _bevelW = _dSlacked + _bevelSlack;
+  _bevelH = 0.5;
+
+
+  stackConnectorBase(connectorRectSocketSlack);
+
+  translate(v=[_wSlacked/2, _wSlacked/2, connectorTotalHeight - connectorSocketMagnetExtrudeHeight])
+  cylinder(r=magnetRSlacked, h=magnetHSlacked);
+
+  // bevel at the lip of the socket to guide the plug, as well as mitigate elephant foot during 3d printing
+  hull() {
+    translate(v=[0,0,_bevelH])
+    linear_extrude(height=eps)
+    square(size = [_wSlacked, _dSlacked]);
+
+    translate(v=[-_bevelSlack/2, -_bevelSlack/2, 0])
+    linear_extrude(height=eps)
+    square(size = [_bevelR, _bevelW]);
+  }
+}
+
+module test() {
+  difference() {
+    union() {
+      translate(v = [-2.5, -2.5, 0])
+      cube(size = [15, 15, 10]);
+
+      translate(v = [0, 0, 10])
+      stackConnectorPlug();
+    }
+
+    stackConnectorSocket_N();
+  }
+}
+
+*test();
+