dingfeng.wong
98 lines
3.0 KiB
OpenSCAD
98 lines
3.0 KiB
OpenSCAD
// 2020 Extrusion Insert
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// Configurable 3D printable insert for 2020 aluminum extrusion
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// Import PCIe holder functionality
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include <holder.scad>;
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// Import hexagon functionality for M3 nut holes
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include <hexagon.scad>;
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// Trapezium module - creates a centralized trapezoid shape (2D)
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// Parameters:
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// base_width: width of the bottom edge
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// top_width: width of the top edge
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// height: height of the trapezium
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module trapezium_2d(base_width, top_width, height) {
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// Create the trapezoid points (centered)
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points = [
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[-base_width/2, -height/2], // bottom left
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[base_width/2, -height/2], // bottom right
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[top_width/2, height/2], // top right
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[-top_width/2, height/2] // top left
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];
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polygon(points);
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}
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// Rectangle module - creates a rectangle extending from base (2D)
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// Parameters:
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// width: width of the rectangle
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// height: height of the rectangle
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// offset_y: vertical offset from origin (default 0)
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module rectangle_2d(width, height, offset_y = 0) {
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translate([0, offset_y])
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square([width, height], center = true);
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}
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// Combined module - joins trapezium and rectangle together
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// Parameters:
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// trap_base_width: trapezium base width
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// trap_top_width: trapezium top width
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// trap_height: trapezium height
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// rect_width: rectangle width
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// rect_height: rectangle height
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// rect_offset: vertical offset for rectangle from trapezium base
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module trapezium_with_rectangle_2d(
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trap_base_width,
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trap_top_width,
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trap_height,
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rect_width,
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rect_height,
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rect_offset = 0
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) {
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union() {
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// Main trapezium
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trapezium_2d(trap_base_width, trap_top_width, trap_height);
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// Rectangle extending from base
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translate([0, -trap_height/2 + rect_offset])
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rectangle_2d(rect_width, rect_height);
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}
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}
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// Example usage (uncomment to test):
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// Individual shapes:
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//trapezium_2d(base_width = 20, top_width = 10, height = 15);
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//translate([30, 0]) rectangle_2d(width = 8, height = 5);
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// Combined shape extruded to 3D with M3 nut hole:
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rect_height_val = 1.7;
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extrude_height = 10;
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difference() {
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// Main extruded shape
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linear_extrude(height = extrude_height) {
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trapezium_with_rectangle_2d(
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trap_base_width = 10.95,
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trap_top_width = 5.5,
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trap_height = 4.0,
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rect_width = 6.3,
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rect_height = rect_height_val,
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rect_offset = -rect_height_val/2 + 0.01 // Small overlap for clean union
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);
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}
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// M3 nut hole on top face of trapezium (extended outward for clean cut)
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translate([0, 4.0/2 + (m3_nut_height + 2)/2, extrude_height/2]) {
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rotate([90, 0, 0]) {
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hexagon_3d(m3_nut_width, m3_nut_height + 2); // Extra height for clean cut
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}
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}
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// M3 bolt hole through entire trapezium
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translate([0, 4.0/2, extrude_height/2]) {
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rotate([90, 0, 0]) {
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cylinder(h = rect_height_val + 20, d = 3.2, center = true, $fn = 32); // Long M3 clearance hole
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}
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}
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} |