122 lines
3.7 KiB
OpenSCAD
122 lines
3.7 KiB
OpenSCAD
include <./config.scad>
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include <./screws.scad>
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/* Small horizontal planes at the top and bottom of the main rails. Used so we can fasten the rail to the frame
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Note that this value is also used for a depression at the bottom/top of the frame for aligning the rail */
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railFootThickness = 3;
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railTotalHeight = screwDiff * (numRailScrews + 1) + 2 * railFootThickness;
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mainRail();
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echo("Total Rail Height = ", railTotalHeight);
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module mainRail() {
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// Distance between the middle of a screw mount and the rail's vertical edges
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railScrewHoleToInnerEdge = 5;
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railScrewHoleToOuterEdge = 5;
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// Distance between the midpoint of the rail screw holes.
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rackMountScrewWidth = maxUnitWidth + 2 * railScrewHoleToInnerEdge;
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railFrontThickness = 6; // Make sure that the nuts for the chosen screw type can slot within the front face
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railSideMountThickness = 2.5;
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railOtherThickness = 2.5;
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// Extra spacing for the rack unit screws.
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frontScrewSpacing = 8;
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sideSupportExtraSpace = 2;
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sideSupportScrewHoleToFrontEdge = 5;
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sideSupportScrewHoleToBackEdge = 4.5;
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sideSupportDepth = sideSupportScrewHoleToBackEdge + sideSupportScrewHoleToFrontEdge;
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frontFaceWidth = railScrewHoleToInnerEdge + railScrewHoleToOuterEdge;
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union() {
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_frontRailSegment();
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translate(v = [0, railFrontThickness, 0])
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_connectingLBracketRailSegment();
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translate(v = [frontFaceWidth - sideSupportExtraSpace, railFrontThickness + railOtherThickness + frontScrewSpacing,
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0])
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rotate(a = [0, 0, 90])
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_sideSupportSegment();
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translate(v = [0, railFrontThickness + railOtherThickness + frontScrewSpacing, 0]) {
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_railFeet();
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translate(v = [0, 0, railTotalHeight - railFootThickness])
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_railFeet();
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}
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}
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module _frontRailSegment() {
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difference() {
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cube(size = [frontFaceWidth, railFrontThickness, railTotalHeight]);
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for (i = [1:numRailScrews]) {
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translate(v = [railScrewHoleToOuterEdge, railFrontThickness / 2, i * screwDiff + railFootThickness])
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rotate(a = [90, 0, 0])
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hexNutPocket_N(mainRailScrewType);
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}
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}
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}
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module _connectingLBracketRailSegment() {
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difference() {
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cube(size = [railOtherThickness, frontScrewSpacing + railOtherThickness, railTotalHeight]);
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union() {
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translate(v = [0, 4, railFootThickness + screwDiff / 2])
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rotate(a = [0, 90, 0])
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cylinder(r = screwRadiusSlacked(rackFrameScrewType), h = 10, $fn = 32, center = true);
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translate(v = [0, 4, railTotalHeight - (railFootThickness + screwDiff / 2)])
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rotate(a = [0, 90, 0])
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cylinder(r = screwRadiusSlacked(rackFrameScrewType), h = 10, $fn = 32, center = true);
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}
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}
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translate(v = [0, frontScrewSpacing + railOtherThickness, 0])
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rotate(a = [0, 0, 270])
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cube(size = [railOtherThickness, frontFaceWidth - sideSupportExtraSpace, railTotalHeight]);
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}
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module _sideSupportSegment() {
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difference() {
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cube(size = [sideSupportDepth, railSideMountThickness, railTotalHeight]);
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for (i = [1:numRailScrews]) {
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translate(v = [sideSupportScrewHoleToFrontEdge, railFrontThickness / 2, i * screwDiff + railFootThickness])
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rotate(a = [90, 0, 0])
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cylinder(r = screwRadiusSlacked(mainRailSideMountScrewType), h = 10, $fn = 32);
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}
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}
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}
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module _railFeet() {
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difference() {
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cube(size = [frontFaceWidth - sideSupportExtraSpace, sideSupportDepth, railFootThickness]);
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hull() {
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translate(v = [1.5, 5, 0])
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cylinder(r = screwRadiusSlacked(rackFrameScrewType), h = 10, $fn = 32);
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translate(v = [0, 5, 0])
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cube(size = [0.1, screwRadiusSlacked(rackFrameScrewType) * 2, 10], center = true);
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}
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}
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}
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}
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