mirror of
https://github.com/nophead/Mendel90.git
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9345a5b85a
Filled some gaps in the X ends to make them faster to print. D motor bracket lid now one piece again, as PCB now clears it. Calibration object now includes horizontal nut traps. Add c14n_stl.py to canonicalise the STL files. Corrected PLA sample diameter. Removed feed tube connector, works fine without it. Removed tube jig as not required in the kit. Manual updated with new part renders.
77 lines
2.9 KiB
OpenSCAD
77 lines
2.9 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, rad = 0) {
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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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fence_width = sqrt(bearing_dia * bearing_dia - 4 * below * below) + eta;
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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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if(rad)
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hull() {
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rounded_rectangle([width, length, height], center = true, r = rad);
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translate([-width / 2, length / 2 - 1, -height / 2])
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cube(1);
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translate([width / 2 - 1, -length / 2, -height / 2])
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cube(1);
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translate([0, 0, height / 2])
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cube([width, length, eta], center = true);
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}
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else
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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 = [fence_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 = [fence_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, rad = 7);
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