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61 lines
2.3 KiB
OpenSCAD
61 lines
2.3 KiB
OpenSCAD
//
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// Mendel90
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//
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// GNU GPL v2
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// nop.head@gmail.com
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// hydraraptor.blogspot.com
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//
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// Fastens the bearings to the Y-carriage
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//
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// Based on a design by Jeffrey Olijar (Jolijar)
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//
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include <conf/config.scad>
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wall = 2.5; // wall thickness
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end_wall = 2.8;
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clearance = 0.2; // end clearance
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relief = 0.5; // clearance in the middle to stop the bearing rocking
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ziptie_clearance = 1;
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ziptie = small_ziptie;
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zipslot_width = ziptie_width(ziptie) + ziptie_clearance;
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zipslot_tickness = ziptie_thickness(ziptie) + ziptie_clearance;
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function bearing_holder_length(bearing) = bearing[0] + 2 * (end_wall + clearance);
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function bearing_holder_width(bearing) = bearing[1] + wall * 2;
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function bearing_ziptie_radius(bearing) = bearing[1] / 2 + wall + eta;
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module bearing_holder(bearing, bar_height, populate = false) {
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bearing_length = bearing[0];
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bearing_dia = bearing[1];
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below = 5 * bearing_dia / 15;
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height = bar_height + bearing_dia/2 - below;
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offset = below + height / 2 - bearing_dia / 2;
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fence = 2.5;
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width = bearing_holder_width(bearing);
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length = bearing_holder_length(bearing);
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fence_offset = bearing_dia / 2 - fence + (fence + 1) /2;
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union(){
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difference() {
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translate([0, 0, -offset]) // Basic shape
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cube(size = [width, length, height], center = true);
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rotate([90,0,0]) {
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cylinder(h = length + 1, r = bearing_dia / 2, center=true); // Bearing Cutout
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cylinder(h = length / 2, r = bearing_dia / 2 + relief, center=true);// releave the center so does not rock
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tube(h = zipslot_width, ir = bearing_dia / 2 + wall,
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or = bearing_dia / 2 + wall + zipslot_tickness, fn=64); // ziptie slot
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}
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}
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translate([0, (length - end_wall)/ 2, -fence_offset]) cube(size = [width,end_wall,fence + 1], center = true); // Blocks at the end to keep the bearing from sliding out
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translate([0, -(length - end_wall)/ 2, -fence_offset]) cube(size = [width,end_wall,fence + 1], center = true);
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}
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if(populate)
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rotate([0,0,90])
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linear_bearing(bearing);
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}
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bearing_holder(LM8UU, 20);
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