cyclone-pcb-factory/Hardware/Development/Y_axis/motor_stand.scad

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// Cyclone PCB Factory: a 3D printable CNC machine for PCB manufacture
// Created by Carlosgs (http://carlosgs.es)
// License: Attribution - Share Alike - Creative Commons (http://creativecommons.org/licenses/by-sa/3.0/)
// History:
// - (05/25/2013) Added @yopero's four screw suggestion for the motor stand
// - (05/28/2013) Added @yopero's four screw suggestion for the idle stand
use <../libs/obiscad/bcube.scad>
use <../libs/build_plate.scad>
motor_width = 43;
motor_length = 49; // not used
motor_screw_distance = 31.3;
motor_center_diameter = 23;
motor_screw_diameter = 3.7;
motor_screw_head_diameter = 8;
motor_adjust_margin = 3;
bearing_diameter = 22.4;
M8_rod_diameter = 8.2;
axis_distance = 32;
wall_thickness = 8;
wall_height = 45;
wall_width = 70;
idler_width = 25;
// For the supports with screws
bottom_thickness = 5;
base_width = 20;
base_length = 20+wall_thickness;
base_screw_diameter = 5;
wall_extraWidth_left = base_width+5;
wall_extraWidth_right = 5;
totalWallWidth = wall_width+wall_extraWidth_left+wall_extraWidth_right;
module motorHolesY() {
// Hole for the motor shaft
hull() {
translate([0,motor_adjust_margin/2,0])
cylinder(r=motor_center_diameter/2,h=10*wall_thickness,center=true,$fn=40);
translate([0,-motor_adjust_margin/2,0])
cylinder(r=motor_center_diameter/2,h=10*wall_thickness,center=true,$fn=40);
}
// Hole for the screwdriver
translate([-wall_height/2,0,wall_thickness/2]) rotate([0,90,0]) bcube([2*(wall_thickness-5),5,wall_height],cr=1);
// Screws for holding the motor
for(i=[-1,1]) for(j=[-1,1])
translate([i*motor_screw_distance/2,j*motor_screw_distance/2,2.5-wall_thickness/2]) {
hull() {
translate([0,motor_adjust_margin/2,0])
cylinder(r=motor_screw_diameter/2,h=10*wall_thickness,center=true,$fn=40);
translate([0,-motor_adjust_margin/2,0])
cylinder(r=motor_screw_diameter/2,h=10*wall_thickness,center=true,$fn=40);
}
hull() {
translate([0,motor_adjust_margin/2,0])
cylinder(r=motor_screw_head_diameter/2,h=10*wall_thickness,center=false,$fn=40);
translate([0,-motor_adjust_margin/2,0])
cylinder(r=motor_screw_head_diameter/2,h=10*wall_thickness,center=false,$fn=40);
}
}
}
module motor_stand_no_base(with_motor=true) {
difference() {
translate([wall_height/2,totalWallWidth/2-wall_extraWidth_left,wall_thickness/2])
bcube([wall_height,totalWallWidth,wall_thickness],cr=4,cres=10);
// Position relative to motor shaft
translate([motor_width/2,motor_width/2,wall_thickness/2]) {
if(with_motor)
motorHolesY();
// Bearing holes
rotate([0,0,15]) translate([0,axis_distance,2.5-wall_thickness/2]) {
cylinder(r=(M8_rod_diameter*2)/2,h=10*wall_thickness,center=true,$fn=40);
cylinder(r=bearing_diameter/2,h=10*wall_thickness,center=false,$fn=60);
}
} // End of translate relative to motor shaft
} // End of difference
}
module holder(h=35,noScrews=false,base_width_inc=0) {
difference() {
union() {
translate([wall_height-bottom_thickness,0]) {
if(!noScrews) cube([bottom_thickness,base_width+base_width_inc,base_length]);
hull() {
cube([bottom_thickness,5,base_length]);
translate([-h,0,0])
cube([0.001,5,0.001]);
}
}
}
// --- screws for the base ---
if(!noScrews) translate([wall_height,base_width/2+2.5,base_length/1.5])
rotate([0,90,0]) {
translate([-5,0,0])
cylinder(r=base_screw_diameter/2,h=100,center=true,$fn=7);
translate([5,0,0])
cylinder(r=base_screw_diameter/2,h=100,center=true,$fn=7);
}
} // End of difference
}
module motor_stand(with_motor=true) {
union() {
motor_stand_no_base(with_motor);
translate([0,wall_width]) holder(noScrews=true);
translate([0,52.4-5/2]) holder(h=12,base_width_inc=1);
translate([0,-wall_extraWidth_left+base_width]) scale([1,-1,1]) holder();
}
}
module idle_stand() {
union() {
intersection() { // Remove the motor part
motor_stand(with_motor=false);
translate([wall_height/2,wall_width/2+52.4-(wall_width+wall_extraWidth_right-52.4),wall_thickness/2])
bcube([wall_height,wall_width,100],cr=4,cres=10);
}
translate([0,wall_width+5-2*(wall_width+wall_extraWidth_right-52.4)]) holder(noScrews=true);
translate([0,52.4+5/2]) scale([1,-1,1]) holder(h=15,base_width_inc=1);
}
}
//for display only, doesn't contribute to final object
build_plate(3,200,200);
//motor_stand();
idle_stand();