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Bearing holder changes for Huxley.

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This commit is contained in:
Chris Palmer 2016-01-06 15:36:19 +00:00
parent 10b0233719
commit 81a7a7c729
2 changed files with 10 additions and 8 deletions
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18
scad/bearing-holder.scad
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@ -11,10 +11,10 @@
//
include <conf/config.scad>
wall = 2.5; // wall thickness
end_wall = 2.8;
relief = squeeze ? 0.25 : 0.5; // clearance in the middle to stop the bearing rocking
wall = squeeze ? 3 * filament_width + relief + eta : 2.5; // wall thickness
clearance = 0.2; // end clearance
relief = 0.5; // clearance in the middle to stop the bearing rocking
end_wall = min(default_wall, 3) - clearance;
ziptie_clearance = 1;
ziptie = small_ziptie;
@ -24,17 +24,18 @@ 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 zipslot_width() = zipslot_width;
function bearing_ziptie_radius(bearing) = bearing[1] / 2 + wall + eta;
module bearing_holder(bearing, bar_height, populate = false, rad = 0) {
module bearing_holder(bearing, bar_height, populate = false, rad = 0, tie_offset = 0) {
bearing_length = bearing[0];
bearing_dia = bearing[1];
below = 5 * bearing_dia / 15;
height = bar_height + bearing_dia/2 - below;
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;
fence_width = sqrt(sqr(bearing_dia) - 4 * sqr(bearing_dia / 2 - fence)) + eta;
width = bearing_holder_width(bearing);
length = bearing_holder_length(bearing);
fence_offset = bearing_dia / 2 - fence + (fence + 1) /2;
@ -60,8 +61,9 @@ module bearing_holder(bearing, bar_height, populate = false, rad = 0) {
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, 0, tie_offset])
tube(h = zipslot_width, ir = bearing_dia / 2 + wall,
or = bearing_dia / 2 + wall + zipslot_tickness, fn=64); // ziptie slot
}
}