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Z coupling smaller on Huxley.

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This commit is contained in:
Chris Palmer 2016-01-06 17:20:47 +00:00
parent b48b2168a8
commit bb95dcc5cb
1 changed files with 9 additions and 8 deletions
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17
scad/z-coupling.scad
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@ -14,13 +14,12 @@ actual_dia = [ undef, undef, undef, undef, undef, 4.82, 5.65, undef, 7.8]; // m
studding_dia = actual_dia[Z_screw_dia];
shaft_dia = 7.75; // includes tubing
squeeze = 0.5; // how much holes undersized
squeeze_shaft = 0.5; // how much holes undersized
holeR = M3_clearance_radius;
nutR = M3_nut_radius;
nutH = M3_nut_trap_depth;
corner_cut = 26;
wall = 2;
gap = wall;
gap = 2;
holeX = 7.5;
holeY2 = studding_dia / 2 + M3_clearance_radius;
@ -28,13 +27,14 @@ holeY1 = shaft_dia / 2 + M3_clearance_radius;
nut_flat_radius = M3_nut_radius * cos(30);
width = 2 * (max(holeY2, holeY1) + nut_flat_radius + wall);
length = 30;
length = 22 + 2 * thick_wall;
tubing_length = (length - gap) / 2 + 2;
function z_coupling_length() = length;
function z_coupling_gap() = gap;
depth = 8;
depth = squeeze ? 7 : 8;
echo(squeeze,depth);
centre_line = depth / 2;
rad = M3_nut_radius + wall;
@ -67,8 +67,8 @@ module z_coupling_stl(){
translate([-holeX, holeY2, - depth / 2]) rotate([0,0,-30]) cylinder(h = nutH * 2, r=nutR, $fn=6, center=true);
//shaft groves
translate([-gap / 2, 0, centre_line]) rotate([0,-90,0]) cylinder(h = length, r = (studding_dia - squeeze) / 2);
translate([ gap / 2, 0, centre_line]) rotate([0, 90,0]) cylinder(h = length, r = (shaft_dia - squeeze) / 2);
translate([-gap / 2, 0, centre_line]) rotate([0,-90,0]) cylinder(h = length, r = (studding_dia - squeeze_shaft) / 2);
translate([ gap / 2, 0, centre_line]) rotate([0, 90,0]) cylinder(h = length, r = (shaft_dia - squeeze_shaft) / 2);
//screw holes
for(y = [-1, 1]) {
@ -91,6 +91,7 @@ module z_coupling_stl(){
module z_coupler_assembly() {
//assembly("z_coupler_assembly");
screw_length = screw_longer_than(depth * 2 + washer_thickness(M3_washer) - nutH + nut_thickness(M3_nut, true));
for(side = [-1, 1])
explode([10 * side, 0, 0])
@ -100,7 +101,7 @@ module z_coupler_assembly() {
for(pos = [[holeX, holeY1], [-holeX, -holeY2]])
translate([pos[0], pos[1], -depth/2])
rotate([180, 0, 0])
screw_and_washer(M3_cap_screw, 20);
screw_and_washer(M3_cap_screw, screw_length);
for(pos = [[holeX, -holeY1], [-holeX, holeY2]])
translate([pos[0], pos[1], -depth/2 + nutH])