finish instructions

helper/math.scad

@@ -23,3 +23,5 @@ module mirror4XY(p, dx, dy) {
     translate(v=[px+dx, py+dy, 0])
     children(0);
 }
+
+function lerp(a, b, t) = (b * t + a * (1 - t));

helper/screws.scad

@@ -84,6 +84,17 @@ module counterSunkHead_N(screwType, screwExtension=0, headExtension=0) {
   }
 }
 
+module hexNut(screwType) {
+  if (screwType == "m3") {
+    translate(v=[0,0,-m3HexNutThickness/2])
+    difference() {
+      cylinder(r=m3HexNutWidthAcrossCorners/2, h=m3HexNutThickness, $fn=6);
+      cylinder(r=m3Radius,h=inf10);
+    }
+  } else {
+    error("Unsupported screw type");
+  }
+}
 
 module hexNutPocket_N(screwType, openSide=true) {
   if (screwType == "m3") {

rack/assemblyGuide.scad

@@ -7,11 +7,325 @@ include <./side/magnetModule.scad>
 include <./side/hingeModule.scad>
 include <./side/sideWallRight.scad>
 include <./side/sideWallLeft.scad>
+include <./stackEnds.scad>
+include <./xyPlate.scad>
 
 assemblyInstructions();
 
 module assemblyInstructions () {
 
+  // Instruction List (in order)
+  // TODO: add steps to glue magnets and add heatset inserts
+
+  // attachXBarWithYBar(at=$t);
+  // screwXBarAndYBar(at=$t);
+  // attachSideConnectorModulesToYBars(at=$t);
+  // connectXYTrayWithMainRails(at=$t);
+  // insertDowelsIntoSideWall(at=$t);
+  // propUpBottomXYTraywithSideWalls(at=$t);
+  // attachXYTrays(at=$t);
+  // slideHexNutToFeet(at=$t);
+  // insertFeet(at=$t);
+  // screwFeet(at=$t);
+  // attachXYPlates(at=$t);
+
+  // end instructions
+  final();
+
+  module attachXBarWithYBar(at=0) {
+
+    t = lerp(a=20, b=0, t=at);
+
+    // assemble x-y bar trays
+    multmatrix(translate(v = [0, 0, t]))
+    yBar();
+
+    multmatrix(translate(v = [0, 0, t])*xBarSpaceToYBarSpace*xBarMirrorOtherCornerTrans*yBarSpaceToXBarSpace)
+    yBar();
+
+    multmatrix(xBarSpaceToYBarSpace)
+    xBar();
+
+    multmatrix(yBarMirrorOtherCornerTrans*xBarSpaceToYBarSpace)
+    xBar();
+  }
+
+  module screwXBarAndYBar(at=0) {
+    screwExtension = lerp(a=15, b=0, t=at);
+
+    // in x bar space
+    function xBarYBarScrewTrans(extension) =
+      translate(v=[27,xBarSideThickness + extension,6]) * rotate(a=[270,0,0]);
+
+    // screw to connect x and y bars
+    yBar();
+
+    multmatrix(xBarSpaceToYBarSpace*xBarMirrorOtherCornerTrans*yBarSpaceToXBarSpace)
+    yBar();
+
+    multmatrix(xBarSpaceToYBarSpace)
+    union() {
+      xBar();
+
+      multmatrix(xBarYBarScrewTrans(screwExtension))
+      caseScrewB();
+
+      multmatrix(xBarMirrorOtherCornerTrans * xBarYBarScrewTrans(screwExtension))
+      caseScrewB();
+    }
+
+    multmatrix(yBarMirrorOtherCornerTrans*xBarSpaceToYBarSpace)
+    union() {
+      xBar();
+
+      multmatrix(xBarYBarScrewTrans(screwExtension))
+      caseScrewB();
+
+      multmatrix(xBarMirrorOtherCornerTrans * xBarYBarScrewTrans(screwExtension))
+      caseScrewB();
+    }
+  }
+
+  module attachSideConnectorModulesToYBars(at=0) {
+    elevation = lerp(a=8, b=0, t=at);
+
+    // side module to front corner ybar
+    function sideModuleTrans(t=0) =
+        translate(v=[sideWallConnW,0,t-sideWallConnLugDepression])
+        * yBarSideModuleConnectorTrans
+      * mirror(v=[1,0,0]); // mirror for magnetModule
+
+    screwXBarAndYBar(at=1);
+
+    multmatrix(sideModuleTrans(elevation))
+    union() {
+      magnetModule();
+
+      translate(v=[yBarScrewHoleToOuterYEdge,yBarScrewHoleToFrontXEdge,sideWallConnLugDepression + 2*elevation])
+      caseScrewA();
+    }
+
+    multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * sideModuleTrans(elevation))
+    union() {
+      magnetModule();
+
+      translate(v=[yBarScrewHoleToOuterYEdge,yBarScrewHoleToFrontXEdge,sideWallConnLugDepression + 2*elevation])
+      caseScrewA();
+    }
+
+    multmatrix(yBarMirrorOtherCornerTrans * sideModuleTrans(elevation))
+    union() {
+      hingeModule();
+
+      translate(v=[yBarScrewHoleToOuterYEdge,yBarScrewHoleToFrontXEdge,sideWallConnLugDepression + 2*elevation])
+      caseScrewA();
+    }
+
+    multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * yBarMirrorOtherCornerTrans * sideModuleTrans(elevation))
+    union() {
+      hingeModule();
+
+      translate(v=[yBarScrewHoleToOuterYEdge,yBarScrewHoleToFrontXEdge,sideWallConnLugDepression + 2*elevation])
+      caseScrewA();
+    }
+  }
+
+  module connectXYTrayWithMainRails(at=0) {
+
+    elevation = lerp(a=5, b=0, t=at);
+
+    attachSideConnectorModulesToYBars(at=1);
+
+    function mainRailTrans(elevation) = translate(v=[0,0,elevation]) * yBarMainRailConnectorTrans;
+
+    module railAndScrew(elevation) {
+      mainRail();
+
+      translate(v=[railSideMountThickness + 5, railFrontThickness + 4,railFootThickness + 2*elevation])
+      caseScrewA();
+    }
+
+    multmatrix(mainRailTrans(elevation=elevation))
+    railAndScrew(elevation=elevation);
+
+    multmatrix(yBarMirrorOtherCornerTrans * mainRailTrans(elevation=elevation))
+    railAndScrew(elevation=elevation);
+
+    multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * mainRailTrans(elevation=elevation))
+    railAndScrew(elevation=elevation);
+
+    multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * yBarMirrorOtherCornerTrans * mainRailTrans(elevation=elevation))
+    railAndScrew(elevation=elevation);
+  }
+
+  module insertDowelsIntoSideWall(at=0) {
+
+    t = lerp(a=10, b=0, t=at);
+
+    hingeHoleH = hingePoleH-sideWallConnLugDepression;
+
+    sideWallLeft();
+
+    translate(v=[hingePoleDx,hingePoleDy, (sideWallZ-hingeHoleH) + t])
+    hingeDowel();
+
+    translate(v=[hingePoleDx,hingePoleDy, (hingeHoleH-hingePoleH)-t])
+    hingeDowel();
+
+  }
+
+  module propUpBottomXYTraywithSideWalls(at=0, r=0) {
+
+    t = lerp(a=10,b=0,t=at);
+
+    function sideWallToYBarTrans(t=0,r=0) =
+        yBarMirrorOtherCornerTrans *
+        yBarSideModuleConnectorTrans * // bring to y bar space
+        mirror(v=[0,1,0]) *
+        translate(v=[0,0,t]) *
+        translate(v=[sideWallConnW/2.0, -hingePoleR, sideWallZHingeTotalClearance]) * // bring to side module space
+        rotate(a=[0,0,-r]) *
+        translate(v=[-hingePoleDx, -hingePoleDy, 0]);
+
+    connectXYTrayWithMainRails(at=1);
+
+    multmatrix(sideWallToYBarTrans(t=t, r=r))
+    insertDowelsIntoSideWall(at=1);
+
+    multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * sideWallToYBarTrans(t=t,r=r))
+    insertDowelsIntoSideWall(at=1);
+  }
+
+  module attachXYTrays(at=0) {
+
+    t = lerp(a=10,b=0,t=at);
+
+    module singleScrew(t=0) {
+      translate(v = [railSideMountThickness+5, railFrontThickness+4, railFootThickness + 2*t])
+      caseScrewA();
+    }
+
+    translate(v=[0,0,t])
+    multmatrix(upperXYTrayTrans) {
+      attachSideConnectorModulesToYBars(at=1);
+
+      multmatrix(yBarMainRailConnectorTrans)
+      singleScrew(t=t);
+
+      multmatrix(yBarMirrorOtherCornerTrans * yBarMainRailConnectorTrans)
+      singleScrew(t=t);
+
+      multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * yBarMirrorOtherCornerTrans * yBarMainRailConnectorTrans)
+      singleScrew(t=t);
+
+      multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * yBarMirrorOtherCornerTrans * yBarMirrorOtherCornerTrans * yBarMainRailConnectorTrans)
+      singleScrew(t=t);
+
+    }
+
+    propUpBottomXYTraywithSideWalls(at=1,r=0);
+  }
+
+  module slideHexNutToFeet(at=0) {
+
+    t = lerp(a=8, b=0, t=at);
+
+    module slideNut() {
+      rotate(a = [0, 0, 90])
+      rotate(a = [90, 0, 0])
+      color([0, 1, 1])
+      hexNut(rackFrameScrewType);
+    }
+
+    translate(v=[0,t,connectorBottomToScrew + 0.5]) // where does this come from again? slack?
+    slideNut();
+
+    translate(v=[stackConnectorDx,t,connectorBottomToScrew + 0.5]) // where does this come from again? slack?
+    slideNut();
+
+    stackConnectorFeet();
+  }
+
+  module insertFeet(at=0) {
+
+    t = lerp(a=10,b=0,t=at);
+
+    attachXYTrays(at=1);
+
+    multmatrix(feetToYBarTrans(t=t))
+    slideHexNutToFeet(at=1);
+
+    multmatrix(yBarMirrorOtherCornerTrans * feetToYBarTrans(t=t))
+    slideHexNutToFeet(at=1);
+  }
+
+  module screwFeet(at=0) {
+
+    t = lerp(a=20, b=0, t=at);
+
+    function screwTrans(t=0) = translate(v=[-t - 9,0,connectorBottomToScrew]) * rotate(a=[0,-90,0]);
+    mirrorOtherFeetStackConnectorTrans = translate(v=[stackConnectorDx,0,0]) * mirror(v=[1,0,0]);
+
+
+    module screwToFeetModule() {
+      multmatrix(feetToYBarTrans(t = 0)*screwTrans(t = t))
+      caseScrewB(); // we might want a longer screw?
+
+      multmatrix(feetToYBarTrans(t = 0)*mirrorOtherFeetStackConnectorTrans*screwTrans(t = t))
+      caseScrewB();
+    }
+
+    screwToFeetModule();
+
+    multmatrix(yBarMirrorOtherCornerTrans)
+    screwToFeetModule();
+
+    insertFeet(at=1);
+  }
+
+  module attachXYPlates(at=0) {
+
+    t = lerp(a=10,b=0,t=at);
+
+    // TODO fix xyPlate transformations
+    function xyPlateToYBarTrans() = translate(v=[6,6,0]) * yBarBasePlateConnectorTrans;
+
+    screwFeet(at=1);
+
+    multmatrix(xyPlateToYBarTrans())
+    xyPlateWithScrews(t=t);
+
+    multmatrix(upperXYTrayTrans * xyPlateToYBarTrans())
+    xyPlateWithScrews(t=t);
+
+    module xyPlateWithScrews(t=0) {
+
+      module screw(t=0) {
+        translate(v=[0,0,-t])
+        mirror(v=[0,0,1])
+        caseScrewA();
+      }
+
+      translate(v=[0,0,-t])
+      xyPlate();
+
+      screw(t=2*t);
+
+      translate(v=[xyPlateConnDx, 0,0])
+      screw(t=2*t);
+
+      translate(v=[0, xyPlateConnDy,0])
+      screw(t=2*t);
+
+      translate(v=[xyPlateConnDx, xyPlateConnDy,0])
+      screw(t=2*t);
+    }
+  }
+
+  module final() {
+    attachXYPlates(at=1);
+  }
+
   xBarSpaceToYBarSpace =
       yBarXBarConnectorTrans *
       xBarConnectorToYBarConnectorTrans *
@@ -22,18 +336,15 @@ module assemblyInstructions () {
       yBarConnectorToXBarConnectorTrans *
     inv4x4(yBarXBarConnectorTrans);
 
-  module xyTray() {
+  upperXYTrayTrans =
-    yBar();
+      yBarMainRailConnectorTrans *
+      mirrorMainRailOtherSideTrans *
+    inv4x4(yBarMainRailConnectorTrans);
 
-    multmatrix(xBarSpaceToYBarSpace*xBarMirrorOtherCornerTrans*yBarSpaceToXBarSpace)
+  function feetToYBarTrans(t=0) =
-    yBar();
+      translate(v=[connectorRectWidth/2,connectorRectDepth/2,-t]) *
-
+      yBarStackConnectorTrans *
-    multmatrix(xBarSpaceToYBarSpace)
+    mirror(v=[0,1,0]);
-    xBar();
-
-    multmatrix(yBarMirrorOtherCornerTrans*xBarSpaceToYBarSpace)
-    xBar();
-  }
 
 
   module caseScrewA() {
@@ -72,202 +383,4 @@ module assemblyInstructions () {
     }
   }
 
-  module attachXBarWithYBar() {
-    // assemble x-y bar trays
-    multmatrix(translate(v = [0, 0, 20]))
-    yBar();
-
-    multmatrix(translate(v = [0, 0, 20])*xBarSpaceToYBarSpace*xBarMirrorOtherCornerTrans*yBarSpaceToXBarSpace)
-    yBar();
-
-    multmatrix(xBarSpaceToYBarSpace)
-    xBar();
-
-    multmatrix(yBarMirrorOtherCornerTrans*xBarSpaceToYBarSpace)
-    xBar();
-  }
-
-
-  module screwXBarAndYBar(screwExtension=13) {
-
-    // in x bar space
-    function xBarYBarScrewTrans(extension) =
-      translate(v=[27,xBarSideThickness + extension,6]) * rotate(a=[270,0,0]);
-
-    // screw to connect x and y bars
-    yBar();
-
-    multmatrix(xBarSpaceToYBarSpace*xBarMirrorOtherCornerTrans*yBarSpaceToXBarSpace)
-    yBar();
-
-    multmatrix(xBarSpaceToYBarSpace)
-    union() {
-      xBar();
-
-      multmatrix(xBarYBarScrewTrans(screwExtension))
-      caseScrewB();
-
-      multmatrix(xBarMirrorOtherCornerTrans * xBarYBarScrewTrans(screwExtension))
-      caseScrewB();
-    }
-
-    multmatrix(yBarMirrorOtherCornerTrans*xBarSpaceToYBarSpace)
-    union() {
-      xBar();
-
-      multmatrix(xBarYBarScrewTrans(screwExtension))
-      caseScrewB();
-
-      multmatrix(xBarMirrorOtherCornerTrans * xBarYBarScrewTrans(screwExtension))
-      caseScrewB();
-    }
-  }
-
-  module attachSideConnectorModulesToYBars(elevation=0) {
-    // attach side connector modules to y bars
-
-    // side module to front corner ybar
-    function sideModuleTrans(t=0) =
-        translate(v=[sideWallConnW,0,t-sideWallConnLugDepression])
-        * yBarSideModuleConnectorTrans
-      * mirror(v=[1,0,0]); // mirror for magnetModule
-
-    screwXBarAndYBar(screwExtension=0);
-
-    multmatrix(sideModuleTrans(elevation))
-    union() {
-      magnetModule();
-
-      translate(v=[yBarScrewHoleToOuterYEdge,yBarScrewHoleToFrontXEdge,sideWallConnLugDepression + 2*elevation])
-      caseScrewA();
-    }
-
-    multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * sideModuleTrans(elevation))
-    union() {
-      magnetModule();
-
-      translate(v=[yBarScrewHoleToOuterYEdge,yBarScrewHoleToFrontXEdge,sideWallConnLugDepression + 2*elevation])
-      caseScrewA();
-    }
-
-    multmatrix(yBarMirrorOtherCornerTrans * sideModuleTrans(elevation))
-    union() {
-      hingeModule();
-
-      translate(v=[yBarScrewHoleToOuterYEdge,yBarScrewHoleToFrontXEdge,sideWallConnLugDepression + 2*elevation])
-      caseScrewA();
-    }
-
-    multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * yBarMirrorOtherCornerTrans * sideModuleTrans(elevation))
-    union() {
-      hingeModule();
-
-      translate(v=[yBarScrewHoleToOuterYEdge,yBarScrewHoleToFrontXEdge,sideWallConnLugDepression + 2*elevation])
-      caseScrewA();
-    }
-  }
-
-  module connectXYTrayWithMainRails(elevation=5) {
-
-    attachSideConnectorModulesToYBars();
-
-    function mainRailTrans(elevation) = translate(v=[0,0,elevation]) * yBarMainRailConnectorTrans;
-
-    module railAndScrew(elevation) {
-      mainRail();
-
-      translate(v=[railSideMountThickness + 5, railFrontThickness + 4,railFootThickness + 2*elevation])
-      caseScrewA();
-    }
-
-    multmatrix(mainRailTrans(elevation=elevation))
-    railAndScrew(elevation=elevation);
-
-    multmatrix(yBarMirrorOtherCornerTrans * mainRailTrans(elevation=elevation))
-    railAndScrew(elevation=elevation);
-
-    multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * mainRailTrans(elevation=elevation))
-    railAndScrew(elevation=elevation);
-
-    multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * yBarMirrorOtherCornerTrans * mainRailTrans(elevation=elevation))
-    railAndScrew(elevation=elevation);
-  }
-
-  module insertDowelsIntoSideWall(t=10) {
-
-    hingeHoleH = hingePoleH-sideWallConnLugDepression;
-
-    sideWallLeft();
-
-    translate(v=[hingePoleDx,hingePoleDy, (sideWallZ-hingeHoleH) + t])
-    hingeDowel();
-
-    translate(v=[hingePoleDx,hingePoleDy, (hingeHoleH-hingePoleH)-t])
-    hingeDowel();
-
-  }
-
-  //propUpBottomXYTraywithSideWalls(t=0,r=0);
-
-  module propUpBottomXYTraywithSideWalls(t=0, r=0) {
-
-    function sideWallToYBarTrans(t=0,r=0) =
-        yBarMirrorOtherCornerTrans *
-        yBarSideModuleConnectorTrans * // bring to y bar space
-        mirror(v=[0,1,0]) *
-        translate(v=[0,0,t]) *
-        translate(v=[sideWallConnW/2.0, -hingePoleR, sideWallZHingeTotalClearance]) * // bring to side module space
-        rotate(a=[0,0,-r]) *
-        translate(v=[-hingePoleDx, -hingePoleDy, 0]);
-
-    connectXYTrayWithMainRails(elevation=0);
-
-    multmatrix(sideWallToYBarTrans(t=t, r=r))
-    insertDowelsIntoSideWall(t=0);
-
-    multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * sideWallToYBarTrans(t=t,r=r))
-    insertDowelsIntoSideWall(t=0);
-  }
-
-  attachXYTrays(t=0);
-
-  module attachXYTrays(t=0) {
-
-    function upperXYTrayTrans(t=0) = yBarMainRailConnectorTrans * mirrorMainRailOtherSideTrans * inv4x4(yBarMainRailConnectorTrans);
-
-    module singleScrew(t=0) {
-      translate(v = [railSideMountThickness+5, railFrontThickness+4, railFootThickness + 2*t])
-      caseScrewA();
-    }
-
-    translate(v=[0,0,t])
-    multmatrix(upperXYTrayTrans(t=0)) {
-      attachSideConnectorModulesToYBars();
-
-      multmatrix(yBarMainRailConnectorTrans)
-      singleScrew(t=t);
-
-      multmatrix(yBarMirrorOtherCornerTrans * yBarMainRailConnectorTrans)
-      singleScrew(t=t);
-
-      multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * yBarMirrorOtherCornerTrans * yBarMainRailConnectorTrans)
-      singleScrew(t=t);
-
-      multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * yBarMirrorOtherCornerTrans * yBarMirrorOtherCornerTrans * yBarMainRailConnectorTrans)
-      singleScrew(t=t);
-
-    }
-
-    propUpBottomXYTraywithSideWalls(t=0,r=10);
-  }
-
-
-  module attachFeet() {
-
-  }
-
-  module attachTops() {
-
-  }
-
 }

rack/connector/basePlateYBarConnectors.scad

@@ -53,7 +53,7 @@ module onYBarBasePlateConnectorNegative() {
     roundCutSlice(radius = _baseConnY/2 + radiusXYSlack);
   }
 
-
+}
 
 module roundCutSlice(radius, length=inf50) {
 
@@ -64,5 +64,3 @@ module onYBarBasePlateConnectorNegative() {
     cube(size = [eps, radius*2, eps]);
   }
 }
-
-}

rack/stackEnds.scad

@@ -1,4 +1,3 @@
-include <./stackConnector.scad>
 include <../helper/halfspace.scad>
 include <../helper/slack.scad>
 include <./sharedVariables.scad>
@@ -7,8 +6,7 @@ include <./sharedVariables.scad>
 stackConnectorDx = rackTotalWidth - 2*(connectorXEdgeToYBarXEdge + connectorRectWidth/2);
 stackConnectorDy = rackTotalDepth - 2*(connectorYEdgeToYBarYEdge + connectorRectDepth/2);
 
-
+*stackConnectorFeet();
-stackConnectorFeet();
 
 module stackConnectorFeet() {
 
@@ -16,7 +14,8 @@ module stackConnectorFeet() {
   height = 18;
   protrusionAngle = 30;
 
-
+  translate(v = [stackConnectorDx/2, 0, 2])
+  mirror(v=[0,0,1]) {
     // stack connectors along rack x axis
     translate(v = [-(stackConnectorDx+connectorRectWidth)/2, -connectorRectDepth/2, 2-overhangSlack])
     mirror(v = [0, 0, 1]) {
@@ -26,6 +25,7 @@ module stackConnectorFeet() {
       stackConnectorBottom();
     }
     band();
+  }
 
 
   module band() {
@@ -40,9 +40,9 @@ module stackConnectorFeet() {
       }
 
       halfspace(vpos=[0,1,-0.8],p=[0,-8,2]);
-      halfspace(vpos=[0,-1,0.75],p=[0,5,2]);
+      halfspace(vpos=[0,-1,0.75],p=[0,6,2]);
 
-      halfspace(vpos=[0,-1,0],p=[0,14,2]);
+      halfspace(vpos=[0,-1,0],p=[0,16,2]);
       halfspace(vpos=[0,1,0],p=[0,-5,2]);
     }
 

rack/xyPlate.scad

@@ -1,14 +1,26 @@
 include <../helper/slack.scad>
 include <./yBar.scad>
 include <./xBar.scad>
+include <./connector/connectors.scad>
 
-xyPlate();
+*xyPlate();
+
+
+xyPlateConnDx = xBarX + 2*_heatSetX; // X distance between connectors
+xyPlateConnDy = yBarDepth - 2*basePlateScrewMountToYBarXZFace; // Y distance between connectors
 
 module xyPlate() {
 
+  translate(v=-[connPosX,connPosY,0]) // center around one of the YBarConnector holes
   applyYBarConnectors()
   plateBody();
 
+  connYBarCornerDx = yBarWidth; // distance from a plate body corner and the nearest yBar corner
+  connYBarCornerDy = xBarY; // distance from a plate body corner and the nearest yBar corner
+
+  connPosX = basePlateScrewMountToYBarYZFace - connYBarCornerDx; // distance between plateBody corner at (0,0,0) and the related corner
+  connPosY = basePlateScrewMountToYBarXZFace - connYBarCornerDy;
+
   module plateBody() {
     plateBodyX = xBarX - xySlack;
     plateBodyY = (yBarDepth - 2*xBarY) - xySlack;
@@ -20,30 +32,23 @@ module xyPlate() {
 
   module applyYBarConnectors() {
 
-    // TODO rename _heatSetX to something more indicative of yBarBasePlateConnector
+    // TODO ren
-    connDx = xBarX + 2*_heatSetX; // X distance between connectors
+    echo("connPosX", connPosX);
-    connDy = yBarDepth - 2*basePlateScrewMountToYBarXZFace; // Y distance between connectors
+    echo("connPosY", connPosY);
-
-    connYBarCornerDx = yBarWidth; // distance from a plate body corner and the nearest yBar corner
-    connYBarCornerDy = xBarY; // distance from a plate body corner and the nearest yBar corner
-
-    connPosX = basePlateScrewMountToYBarYZFace - connYBarCornerDx; // distance between plateBody corner at (0,0,0) and the related corner
-    connPosY = basePlateScrewMountToYBarXZFace - connYBarCornerDy;
-
 
     apply_p() {
       union() {
         translate(v=[connPosX, connPosY, 0])
         yBarConnector();
 
-        translate(v=[connPosX, connPosY+connDy, 0])
+        translate(v=[connPosX, connPosY+xyPlateConnDy, 0])
         yBarConnector();
 
-        translate(v=[connPosX+connDx, connPosY, 0])
+        translate(v=[connPosX+xyPlateConnDx, connPosY, 0])
         rotate(a=[0,0,180])
         yBarConnector();
 
-        translate(v=[connPosX+connDx, connPosY+connDy, 0])
+        translate(v=[connPosX+xyPlateConnDx, connPosY+xyPlateConnDy, 0])
         rotate(a=[0,0,180])
         yBarConnector();