X carriage and nut holder with anti backlash
Antibacklash device 2 nuts and 1 spring embedded in a plastic piece that screws to the X carriage For now only accepts springs up to 35mm long TODO: design can be trimmed to get any value.pull/3/head
yopero
parent
c6b1532239
commit
fd0b21282c
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@ -0,0 +1,443 @@
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// Cyclone PCB Factory: a 3D printable CNC machine for PCB manufacture
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// Created by Carlosgs (http://carlosgs.es)
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// License: Attribution - Share Alike - Creative Commons (http://creativecommons.org/licenses/by-sa/3.0/)
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use <../libs/obiscad/bcube.scad>
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use <../libs/obiscad/bevel.scad>
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use <../libs/build_plate.scad>
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use <../libs/teardrop.scad>
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use <../libs/teardrop.scad>
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include <./lm8uu_holder.scad>
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cyl_res = 40;
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layer_height = 0.4;
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X_smooth_rods_sep = 50;
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X_smooth_rods_sep_projected = sqrt((X_smooth_rods_sep*X_smooth_rods_sep)/2); // Be careful with this measure, it is not properly named since it is used with the following offset:
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smooth_rod_margin = 1;
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X_rod_sep_real = X_smooth_rods_sep_projected+smooth_rod_margin;
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X_rod_sep_real_diag = sqrt(2*(X_rod_sep_real*X_rod_sep_real));
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screw_diam = 4;
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M8_rod_diam = 8.2;
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M8_rod_hole_diam = M8_rod_diam+0.2;
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M8_nut_diameter = 14.6 + .5;
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// Adjust these values to match the thickness of the nuts you will use
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//nut height between 6 - 7mm
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M8_nut_height_Z = 4;
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M8_nut_height_X = 6.5 + .5;
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//SPRING ANTIBACKLASH
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SPRING_OD = 11.76;
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SPRING_LEN = 35;
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SPRING_COMP = 10;
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//SPRING ANTIBACKLASH
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X_axis_nut_support_thickness = 10;
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X_nut_screw_diam = 3;
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lbearing_length = 24;
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Z_smooth_rods_sep = 55;
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Z_smooth_rods_len = 140;
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Z_threaded_rod_len = 120;
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lbearing_holder_length = Z_smooth_rods_sep+M8_rod_diam+5;
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module rod(len=100) {
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color([0.8,0.8,0.8])
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rotate([90,0,0])
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cylinder(r=8/2,h=len,center=true,$fn=32);
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}
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module spring(len = SPRING_LEN, rad = SPRING_OD) {
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translate([0,-SPRING_LEN/4 - M8_nut_height_X +1.5,0])
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color([0.5,0.5,0.5])
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rotate([90,0,0])
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cylinder(r = rad/2, h = len + 2, center=true,$fn=30);
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}
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module rodHole(len=100,radius=M8_rod_hole_diam/2, truncateMM=1) {
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color([0.8,0.8,0.8])
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rotate([90,-90,0])
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translate([0,0,-len/2])
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teardrop(radius, len, truncateMM);
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}
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//--->yOPERO
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module X_nut_holder() {
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//x nut holder cover DEBUG only
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*translate([0,0,0-0])
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X_nut_holder_cover_v1();
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//x nut holder cover DEBUG only
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//block
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difference() {
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translate([0,-1.5,11.5])
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difference(){
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cube([M8_nut_diameter+8,13,42],center=true);
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translate([0,0,14])
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cube([M8_nut_diameter+10,13,10],center=true);
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}
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//X_Nut
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translate([0,-1.5,0])
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rotate([-90,0,0]) hull() {
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rotate([0,0,90]){
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cylinder(r=M8_nut_diameter/2,h=M8_nut_height_X,$fn=6,center=true);
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}
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// translate([0,0,-5])
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// cylinder(r=M8_nut_diameter/2,h=M8_nut_height_X,$fn=6,center=true);
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}
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//spring diff
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spring();
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//Nut embedding
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rotate([90,0,0])
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rotate([0,0,90])
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cylinder(r=M8_rod_diam/2+2,h=40,center=true,$fn=6);
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//Upper screw
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translate([M8_nut_height_X + 1.5,-1.5,0])
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cylinder(r=X_nut_screw_diam/2,h=60,center=true,$fn=20);
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//Lower screw
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translate([-M8_nut_height_X - 1.5,-1.5,0])
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cylinder(r=X_nut_screw_diam/2,h=60,center=true,$fn=20);
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//Nut transversal cut
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translate([0,-1.5,-M8_nut_diameter/2])
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cube([M8_nut_diameter+10,13,M8_nut_diameter],center=true);
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}
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}
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module X_nut_holder_cover_antibacklash_base(){
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//x nut holder cover DEBUG only
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*translate([0,0,0-0])
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X_nut_holder_cover_v1();
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//x nut holder cover DEBUG only
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//block
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difference() {
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translate([0,-1.5,-M8_nut_diameter/2])
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difference(){
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cube([M8_nut_diameter+8,13,M8_nut_diameter],center=true);
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}
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//X_Nut
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translate([0,-1.5,0])
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rotate([-90,0,0]) hull() {
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rotate([0,0,90]){
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cylinder(r=M8_nut_diameter/2,h=M8_nut_height_X,$fn=6,center=true);
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}
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// translate([0,0,-5])
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// cylinder(r=M8_nut_diameter/2,h=M8_nut_height_X,$fn=6,center=true);
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}
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//spring diff
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spring(len=SPRING_LEN/2);
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//Nut embedding
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rotate([90,0,0])
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rotate([0,0,90])
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cylinder(r=M8_rod_diam/2+2,h=40,center=true,$fn=6);
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//Upper screw
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translate([M8_nut_height_X + 1.5,-1.5,0])
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#cylinder(r=X_nut_screw_diam/2,h=60,center=true,$fn=20);
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//Lower screw
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translate([-M8_nut_height_X - 1.5,-1.5,0])
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cylinder(r=X_nut_screw_diam/2,h=60,center=true,$fn=20);
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//Nut transversal cut
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// translate([0,-1.5,-M8_nut_diameter/2])
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// cube([M8_nut_diameter+10,13,M8_nut_diameter],center=true);
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}
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}
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module X_nut_holder_cover_v12(){
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//upper join
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translate([-M8_nut_height_X-3,-(13/4+1.25),-2])
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difference(){
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rotate([90,0,0])
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cylinder(r=X_nut_screw_diam,h=13/2,center=true,$fn=20);
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//screw
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rotate([90,0,0])
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cylinder(r=X_nut_screw_diam/2,h=400,center=true,$fn=20);
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}
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difference() {
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translate([0,-1.5,11.5])
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cube([M8_nut_diameter+6,12.5,42],center=true);
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//block
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rotate([0,45,0]) translate([0,0,-26])
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cube([20,20,20],center=true);
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//bold
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translate([0,-1.5,0])
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rotate([-90,0,0]) hull() {
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rotate([0,0,90])
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cylinder(r=M8_nut_diameter/2,h=M8_nut_height_X,$fn=6,center=true);
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}
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//Nut embedding
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rotate([90,0,0])
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rotate([0,0,90])
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cylinder(r=M8_rod_diam/2+2,h=40,center=true,$fn=6);
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//Joints body
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translate([-M8_nut_height_X-3,13/4-2,-2])
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rotate([90,0,0])
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cylinder(r=X_nut_screw_diam,h=20,center=true,$fn=20);
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//Upper screw
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translate([M8_nut_height_X+2,-1.5,0])
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cylinder(r=X_nut_screw_diam/2,h=60,center=true,$fn=20);
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//corte para obtener unicamente el nut cover
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translate([0,-1.5,13.25+M8_nut_diameter/2])
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cube([M8_nut_diameter+6,13,42],center=true);
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}
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}
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//yOPERO<----
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module X_nut_holder_cover_v1(){
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//upper join
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translate([-M8_nut_height_X-2,-(13/4+1.25),-2])
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difference(){
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rotate([90,0,0])
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cylinder(r=X_nut_screw_diam,h=13/2,center=true,$fn=20);
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//taladro m2
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rotate([90,0,0])
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cylinder(r=X_nut_screw_diam/2,h=400,center=true,$fn=20);
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}
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difference() {
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translate([0,-1.5,11.5])
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cube([M8_nut_diameter+6,12.5,42],center=true);
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//embellecedor
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rotate([0,45,0]) translate([0,0,-26])
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cube([20,20,20],center=true);
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//bold
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translate([0,-1.5,0])
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rotate([-90,0,0]) hull() {
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rotate([0,0,90])
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cylinder(r=M8_nut_diameter/2,h=M8_nut_height_X,$fn=6,center=true);
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}
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//bold embedding
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rotate([90,0,0])
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rotate([0,0,90])
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cylinder(r=M8_rod_diam/2+2,h=40,center=true,$fn=6);
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//Taladro base
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translate([-M8_nut_height_X-2,13/4-2,-2])
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rotate([90,0,0])
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cylinder(r=X_nut_screw_diam,h=20,center=true,$fn=20);
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//taladro m2
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*rotate([90,0,0])
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cylinder(r=X_nut_screw_diam/2,h=40,center=true,$fn=20);
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//Taladro superior >seguro
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translate([M8_nut_height_X+1,-1.5,0])
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cylinder(r=X_nut_screw_diam/2,h=60,center=true,$fn=20);
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//corte para obtener unicamente el nut cover
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translate([0,-1.5,13.25+M8_nut_diameter/2])
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cube([M8_nut_diameter+6,13,42],center=true);
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}
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}
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//yOPERO<----
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module X_nut_holder_cover() {
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X_nut_screw_diam = X_nut_screw_diam*1.2;
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scale([1,1,-1]) rotate([-90,0,0])
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difference() {
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translate([0,0,7])
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cube([M8_nut_diameter+2,3,67],center=true);
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rotate([0,45,0]) translate([0,0,-16])
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cube([20,20,20],center=true);
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rotate([0,45,0]) translate([0,0,19])
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cube([60,20,20],center=true);
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rotate([-90,0,0]) hull() {
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translate([0,-1,0.5])
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rotate([0,0,90])
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cylinder(r=M8_nut_diameter/2,h=M8_nut_height_X,$fn=6);
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translate([0,10,0.5])
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rotate([0,0,90])
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cylinder(r=M8_nut_diameter/2,h=M8_nut_height_X,$fn=6);
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}
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rotate([90,0,0])
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rotate([0,0,90])
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cylinder(r=M8_rod_diam/2+2,h=40,center=true,$fn=6);
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translate([-4,0,10])
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rotate([90,0,0])
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cylinder(r=X_nut_screw_diam/2,h=40,center=true,$fn=20);
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}
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}
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module X_carriage(show_printbed = 0, show_support = 1) {
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if(show_printbed) {
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//for display only, doesn't contribute to final object
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translate([0,0,-lbearing_holder_width/2])
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build_plate(3,110,140);
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}
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difference() {
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union() {
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// Origin is set on the base of the Z threaded rod
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// ---------- Support for the X nut -------------
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translate([-X_rod_sep_real/2,-lbearing_holder_length/2+X_axis_nut_support_thickness/2+0,0]) {
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rotate([180,235,0]){ X_nut_holder();
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}
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}
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// Now, the origin is set on the top smooth rod, and we make a 45deg turn
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translate([-X_rod_sep_real/2,0,X_rod_sep_real])
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rotate([0,45,0]) {
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// --------- Linear bearing supports ------------
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lm8uu_bearing_holder_XZ(lbearing_holder_length);
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translate([X_rod_sep_real_diag,0,0])
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lm8uu_bearing_holder_XZ(lbearing_holder_length);
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difference() {
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union() { // Join both linear bearing holders
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translate([X_rod_sep_real_diag/2,0,lbearing_holder_height/4+2])
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cube([X_rod_sep_real_diag+8,lbearing_holder_length,lbearing_holder_height/2],center=true);
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rotate([0,-45,0]) // Draw a cube for the Z nut holder
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translate([M8_nut_diameter,0,0])
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cube([M8_nut_diameter*1.5,lbearing_holder_length,lbearing_holder_height/2],center=true);
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}
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// Leave clear the inside of the bearing holders
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rotate([90,0,0]) {
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cylinder(r=lbearing_holder_extDiam-1, h=lbearing_holder_length+0.1, center=true, $fn=40);
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translate([X_rod_sep_real_diag,0,0])
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cylinder(r=lbearing_holder_extDiam-1, h=lbearing_holder_length+0.1, center=true, $fn=40);
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}
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}
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}
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// ------- Z smooth rods holder -------
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translate([0,Z_smooth_rods_sep/2,30/2])
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cube([M8_rod_diam+9,M8_rod_diam+5,50],center=true);
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translate([0,-Z_smooth_rods_sep/2,30/2])
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cube([M8_rod_diam+9,M8_rod_diam+5,50],center=true);
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if(show_support) translate([0,0,-10+2/2])
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cube([M8_rod_diam+9,lbearing_holder_length,2],center=true);
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} // End of union
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// -------- Z axis rod holes --------
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translate([0,0,40-M8_nut_height_Z])
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cylinder(r=M8_nut_diameter/2,h=100,$fn=6);// Nut holder (Z)
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rotate([90,0,0]) {
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translate([0,70/2-5,0]) // --- Hole for the threaded rod ---
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rodHole(len=50,radius=M8_rod_diam/2+2, truncateMM=2.5);
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translate([0,Z_smooth_rods_len/2-5,Z_smooth_rods_sep/2])
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rodHole(len=Z_smooth_rods_len);
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translate([0,Z_smooth_rods_len/2-5,-Z_smooth_rods_sep/2])
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rodHole(len=Z_smooth_rods_len);
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}
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} // End of difference
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}
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module X_carriage_assembled(show_printbed = 0, show_Xrods = 0, show_Zrods = 0) {
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X_carriage(show_printbed);
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if(show_Xrods){
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// ---- Rods (for reference) ----
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translate([-X_rod_sep_real/2,0,0]) {
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color([0.5,0.5,0.5]) rod(len=100);
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}
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translate([-X_rod_sep_real/2,0,X_rod_sep_real]) {
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rod(len=100);
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}
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translate([X_rod_sep_real/2,0,0]) {
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rod(len=100);
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}
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}
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if(show_Zrods)
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translate([0,0,0])
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rotate([90,0,0]) {
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translate([0,Z_threaded_rod_len/2-10,0])
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color([0.5,0.5,0.5]) rod(len=Z_threaded_rod_len);
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translate([0,Z_smooth_rods_len/2-5,Z_smooth_rods_sep/2])
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rod(len=Z_smooth_rods_len);
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translate([0,Z_smooth_rods_len/2-5,-Z_smooth_rods_sep/2])
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rod(len=Z_smooth_rods_len);
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}
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}
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module X_carriage_print_plate() {
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//for display only, doesn't contribute to final object
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build_plate(3,110,140);
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translate([0,0,lbearing_holder_length/2])
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rotate([90,0,0])
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X_carriage(show_printbed = 0, show_support = 1);
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}
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X_carriage_assembled(show_printbed = 0,show_Xrods = 1,show_Zrods = 0);
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//X_carriage_print_plate();
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//uncomment the line below to get the x nut cover
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module backlash2(){
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translate([0,SPRING_LEN+M8_nut_diameter/2,0])
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X_nut_holder_cover_antibacklash_base();
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}
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module backlash1(){
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union(){
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mirror([0,1,0])
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translate([0,0,-0.1])
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rotate([0,0,0])
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X_nut_holder_cover_antibacklash_base();
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}
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}
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module antibacklash_cover(){
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difference(){
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union(){
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//front left nut
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backlash1();
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//front right nut
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backlash2();
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//back left nut
|
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mirror([0,0,1])
|
||||
backlash1();
|
||||
//Middle body
|
||||
difference(){
|
||||
translate([0,SPRING_LEN/2+5,-M8_nut_diameter/2])
|
||||
cube([M8_nut_diameter+8,SPRING_LEN-5,M8_nut_diameter/2],center=true);
|
||||
translate([0,SPRING_LEN,0])
|
||||
spring(SPRING_LEN-5);
|
||||
}
|
||||
}
|
||||
//triming to save plastic
|
||||
translate([0,0,-M8_nut_diameter-2])
|
||||
cube([M8_nut_diameter+10,13*10,M8_nut_diameter],center=true);
|
||||
translate([0,0,M8_nut_diameter+2])
|
||||
cube([M8_nut_diameter+10,13*10,M8_nut_diameter],center=true);
|
||||
}
|
||||
}
|
||||
#translate([-X_rod_sep_real/2-.1,-lbearing_holder_length/2+X_axis_nut_support_thickness/2+SPRING_LEN+7.5 ,0]) {
|
||||
rotate([180,235,0])
|
||||
|
||||
antibacklash_cover();
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
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Reference in New Issue