dingfeng.wong
99 lines
3.7 KiB
OpenSCAD
99 lines
3.7 KiB
OpenSCAD
// PCIe Extension Riser Board Holder
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// Configurable 3D printable holder with M3 mounting holes
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// === Design Parameters ===
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thickness = 3; // Thickness of the holder (configurable)
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hole_diameter = 2.8; // M3 hole diameter (slightly smaller for 3D printing)
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margin_x = 8; // Margin on each side of the holes
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margin_y = 6; // Margin above and below the holes (currently unused)
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holder_width = 6; // Width of the rectangular plane
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// === Hole Spacing Parameters ===
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first_hole_spacing = 20.5; // Distance from first to second hole
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second_hole_spacing = 20.5; // Distance from second to third hole
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third_hole_spacing = 22; // Distance from third to fourth hole
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// === Technical Parameters ===
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cylinder_overlap = 0.1; // Small overlap to ensure clean boolean operations
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cylinder_resolution = 32; // Number of facets for cylinders (higher = smoother)
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preview_cylinder_height = 2; // Height of preview cylinders
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preview_cylinder_diameter = 3; // Diameter of preview cylinders
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// === Main Function ===
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module pcie_riser_holder(
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thickness = 3,
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hole_diameter = 2.8,
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margin_x = 8,
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holder_width = 12,
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first_spacing = 20.5,
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second_spacing = 20.5,
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third_spacing = 22,
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show_preview_holes = false
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) {
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// Calculate hole positions
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hole_position_1 = 0;
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hole_position_2 = hole_position_1 + first_spacing;
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hole_position_3 = hole_position_2 + second_spacing;
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hole_position_4 = hole_position_3 + third_spacing;
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hole_positions = [
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hole_position_1,
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hole_position_2,
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hole_position_3,
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hole_position_4
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];
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// Calculate total dimensions
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total_length = hole_position_4 + (margin_x * 2);
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total_width = holder_width;
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// Extension parameters for negative y direction
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extension_from_holes = 42; // 40mm extension in negative y direction from holes
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hole_y_position = total_width/2; // Current hole y position
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// New total width includes original width plus extension
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extended_total_width = total_width + extension_from_holes;
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// Main holder body
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difference() {
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// Create the main rectangular plane, translated to accommodate extension
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translate([0, -extension_from_holes, 0])
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cube([total_length, extended_total_width, thickness]);
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// Create M3 holes (position unchanged relative to original rectangle)
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for (i = [0 : len(hole_positions) - 1]) {
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translate([margin_x + hole_positions[i], hole_y_position, -cylinder_overlap])
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cylinder(
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h = thickness + (cylinder_overlap * 2),
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d = hole_diameter,
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$fn = cylinder_resolution
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);
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}
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}
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// Optional preview holes for reference
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if (show_preview_holes) {
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for (i = [0 : len(hole_positions) - 1]) {
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translate([margin_x + hole_positions[i], hole_y_position, thickness])
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cylinder(
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h = preview_cylinder_height,
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d = preview_cylinder_diameter,
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$fn = cylinder_resolution
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);
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}
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}
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// Display specifications
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echo("=== PCIe Riser Holder Specifications ===");
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echo(str("Total dimensions: ", total_length, "mm x ", extended_total_width, "mm x ", thickness, "mm"));
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echo(str("Extension: 40mm in negative y direction from holes"));
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echo(str("Hole spacing: ", first_spacing, "mm, ", second_spacing, "mm, ", third_spacing, "mm"));
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echo(str("Hole positions: ", hole_positions));
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echo(str("Hole diameter: ", hole_diameter, "mm (for M3 bolts)"));
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echo("=== End Specifications ===");
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}
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// === Test the holder ===
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// Default holder
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pcie_riser_holder();
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