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Mendel90/scad/bearing-holder.scad
Chris Palmer 9345a5b85a Added rounded corners to some parts to make them easier to print.
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.
2013-03-24 18:48:03 +00:00

77 lines
2.9 KiB
OpenSCAD

//
// Mendel90
//
// GNU GPL v2
// nop.head@gmail.com
// hydraraptor.blogspot.com
//
// Fastens the bearings to the Y-carriage
//
// Based on a design by Jeffrey Olijar (Jolijar)
//
include <conf/config.scad>
wall = 2.5; // wall thickness
end_wall = 2.8;
clearance = 0.2; // end clearance
relief = 0.5; // clearance in the middle to stop the bearing rocking
ziptie_clearance = 1;
ziptie = small_ziptie;
zipslot_width = ziptie_width(ziptie) + ziptie_clearance;
zipslot_tickness = ziptie_thickness(ziptie) + ziptie_clearance;
function bearing_holder_length(bearing) = bearing[0] + 2 * (end_wall + clearance);
function bearing_holder_width(bearing) = bearing[1] + wall * 2;
function bearing_ziptie_radius(bearing) = bearing[1] / 2 + wall + eta;
module bearing_holder(bearing, bar_height, populate = false, rad = 0) {
bearing_length = bearing[0];
bearing_dia = bearing[1];
below = 5 * bearing_dia / 15;
height = bar_height + bearing_dia/2 - below;
offset = below + height / 2 - bearing_dia / 2;
fence = 2.5;
fence_width = sqrt(bearing_dia * bearing_dia - 4 * below * below) + eta;
width = bearing_holder_width(bearing);
length = bearing_holder_length(bearing);
fence_offset = bearing_dia / 2 - fence + (fence + 1) /2;
union(){
difference() {
translate([0, 0, -offset]) // Basic shape
if(rad)
hull() {
rounded_rectangle([width, length, height], center = true, r = rad);
translate([-width / 2, length / 2 - 1, -height / 2])
cube(1);
translate([width / 2 - 1, -length / 2, -height / 2])
cube(1);
translate([0, 0, height / 2])
cube([width, length, eta], center = true);
}
else
cube(size = [width, length, height], center = true);
rotate([90,0,0]) {
cylinder(h = length + 1, r = bearing_dia / 2, center=true); // Bearing Cutout
cylinder(h = length / 2, r = bearing_dia / 2 + relief, center=true);// releave the center so does not rock
tube(h = zipslot_width, ir = bearing_dia / 2 + wall,
or = bearing_dia / 2 + wall + zipslot_tickness, fn=64); // ziptie slot
}
}
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
translate([0, -(length - end_wall)/ 2, -fence_offset]) cube(size = [fence_width,end_wall,fence + 1], center = true);
}
if(populate)
rotate([0,0,90])
linear_bearing(bearing);
}
bearing_holder(LM8UU, 20, rad = 7);