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z_base_parts.scad
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z_base_parts.scad
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include <config.scad>
use <GDMUtils.scad>
use <NEMA.scad>
use <joiners.scad>
$fa=2;
$fs=2;
// connectby valid options: "", "fwd", "back"
module z_base(explode=0, connectby="")
{
coupler_len = lifter_coupler_len;
side_joiner_len = 5;
wall_thick = 3;
l = z_base_height;
wall_dx = rail_spacing - (z_joiner_spacing-joiner_width);
wall_ang = atan2(wall_dx/2, l-coupler_len);
side_off = sin(wall_ang)*(motor_length+wall_thick);
cross_dx = rail_spacing/2 + (z_joiner_spacing-joiner_width)/2 + joiner_width;
cross_ang = atan2(cross_dx, l - coupler_len - 2*rail_thick);
cross_l = hypot(cross_dx, l - coupler_len - 2*rail_thick);
motor_width = nema_motor_width(17);
plinth_diam = nema_motor_plinth_diam(17);
up(
(connectby=="fwd")? -rail_height/2 :
(connectby=="back")? -rail_height/2 :
0
) back(
(connectby=="back")? -l/2 :
(connectby=="fwd")? l/2 :
0
) {
color([0.9, 0.7, 1.0])
prerender(convexity=20)
union() {
difference() {
union() {
// Bottom.
up(rail_thick/2) {
fwd((l-2*rail_thick)/2-0.5) {
cube(size=[rail_spacing+joiner_width, 2*rail_thick, rail_thick], center=true);
}
back((l-2*rail_thick)/2-0.5) {
cube(size=[z_joiner_spacing, 2*rail_thick, rail_thick], center=true);
}
intersection() {
xflip_copy() {
right((rail_spacing+joiner_width)/2) {
fwd(l/2-3) {
zrot(cross_ang) {
back(cross_l/2) {
cube(size=[2*rail_thick, cross_l, rail_thick], center=true);
}
}
}
}
}
cube(size=[2*rail_spacing, l-1, rail_thick+1], center=true);
}
}
// Walls.
xflip_copy() {
up(rail_height/2+groove_height/2) {
fwd(l/2) {
skew_xz(xang=wall_ang) {
back((l-coupler_len)/2) {
left((rail_spacing+joiner_width)/2) {
difference() {
union() {
// Wall
if (wall_style == "crossbeams")
sparse_strut(h=rail_height+groove_height, l=l-coupler_len-0.1, thick=joiner_width, strut=7);
if (wall_style == "thinwall")
thinning_wall(h=rail_height+groove_height, l=l-coupler_len-0.1, thick=joiner_width, strut=7);
if (wall_style == "corrugated")
corrugated_wall(h=rail_height+groove_height, l=l-coupler_len-0.1, thick=joiner_width, strut=7);
// Side wiring access hole frame
if (wall_style == "corrugated") {
down((rail_height+groove_height)/2) {
up(15/2+rail_thick) {
cube(size=[joiner_width, 16+4, 10+4], center=true);
}
}
}
// Triangle to increase stability
up(rail_height/2+groove_height/2-0.05) {
fwd((l-coupler_len)/2) {
right(joiner_width/2) {
zrot(90) right_triangle([rail_height/2, joiner_width, groove_height]);
}
}
}
}
// Side wiring access hole
if (wall_style != "crossbeams") {
down((rail_height+groove_height)/2) {
up(15/2+rail_thick) {
cube(size=[joiner_width+1, 16, 10], center=true);
}
}
}
}
}
}
}
}
}
}
// Motor cage
back(l/2-(motor_length+wall_thick)/2-coupler_len)
difference() {
union() {
upcube([motor_width+2*wall_thick, motor_length+2*wall_thick, rail_height+groove_height/2+motor_width/2]);
// Top side supports
back((motor_length+wall_thick)/2) {
upcube([z_joiner_spacing, wall_thick, rail_height+groove_height]);
}
// Bottom side supports
fwd((motor_length+wall_thick)/2) {
up(rail_thick+16) upcube([z_joiner_spacing+2*side_off, wall_thick, rail_height+groove_height-rail_thick-16]);
}
// Motor clip
clip_w = 5;
clip_h = 2;
up(rail_height+groove_height/2+motor_width/2-0.05) {
yflip_copy() {
fwd(motor_length/2+wall_thick/2) {
xspread(motor_width-16) {
trapezoid([clip_w+2*clip_h, wall_thick], [clip_w, wall_thick], h=clip_h, center=false);
back(wall_thick/2) up(clip_h/2) {
yscale(0.75) {
yrot(90) cylinder(d=clip_h, h=clip_w, center=true, $fn=6);
}
}
}
}
}
}
}
up(rail_height+groove_height/2) {
// Clear motor space
cube([motor_width+printer_slop, motor_length+printer_slop, motor_width+0.01], center=true);
// Clear plinth slot
xrot(-90) cylinder(d=plinth_diam, h=motor_length, center=false);
back(motor_length/2) upcube([plinth_diam, motor_length, motor_width]);
// Clear upper side holes
cube([motor_width+3*wall_thick, motor_length/2, plinth_diam], center=true);
fwd(wall_thick) cube([motor_width/2, motor_length+2*wall_thick, plinth_diam], center=true);
}
up(rail_thick) {
// Side bottom motor cage holes.
upcube([motor_width+3*wall_thick, motor_length/2, rail_height+groove_height/2-motor_width/2-rail_thick-5]);
upcube([motor_width/2, motor_length+3*wall_thick, rail_height+groove_height/2-motor_width/2-rail_thick-5]);
// Clear motor standoffs
upcube([motor_width, motor_length/2, rail_height+groove_height/2-motor_width/2-rail_thick+0.01]);
upcube([motor_width/2, motor_length, rail_height+groove_height/2-motor_width/2-rail_thick+0.01]);
}
}
}
// Clear bottom of motor cage
back(l/2-(motor_length+wall_thick)/2-15) {
cylinder(d=min(motor_width, motor_length)*0.67, h=rail_thick*3, center=true);
}
// Clear space for joiners.
up(rail_height/2) {
back(l/2-0.05) joiner_pair_clear(spacing=z_joiner_spacing, h=rail_height, w=joiner_width, clearance=4, a=joiner_angle);
fwd(l/2-0.05) joiner_pair_clear(spacing=rail_spacing+joiner_width, h=rail_height, w=joiner_width, clearance=4, a=joiner_angle);
}
}
// Endstop clip
standoff = 10 - endstop_thick/2;
fwd((endstop_depth+2-l)/2) {
right((z_joiner_spacing+joiner_width-0.01)/2) {
right(endstop_thick/2+2+standoff) {
up(rail_height+groove_height/2) {
difference() {
left(standoff/2) cube([endstop_thick+standoff+2*2, endstop_depth+2, endstop_length+2*2], center=true);
back(2/2) {
cube([endstop_thick+2*printer_slop+0.05, endstop_depth+0.05, endstop_length+2*printer_slop], center=true);
cube([endstop_thick+2*printer_slop-2, endstop_depth+10, endstop_length+2*printer_slop-1], center=true);
}
}
down(endstop_length/2+2+endstop_thick*2/2+5/2-0.05) {
left((endstop_thick)/2+2+standoff) {
right_half() trapezoid([0.05, 0.05], [2*(endstop_thick+2*2+standoff), endstop_depth+2], h=endstop_thick*2+5, center=true);
}
}
zspread(endstop_hole_spacing) {
right(endstop_thick/2) {
back(endstop_depth/2+2/2-endstop_hole_inset) {
scale([0.5, 1, 1]) {
sphere(d=endstop_screw_size, center=true, $fn=8);
}
}
}
}
}
}
}
}
// Snap-tab joiners.
up(rail_height/2+0.05) {
back(l/2) xspread(z_joiner_spacing) yrot(180) joiner(h=rail_height, w=joiner_width, l=coupler_len+0.1, a=joiner_angle);
back(l/2-coupler_len/2) xspread(z_joiner_spacing) up(rail_height/2-0.01) upcube([joiner_width, coupler_len+0.1, groove_height+0.01]);
fwd(l/2) zrot(180) xspread(rail_spacing+joiner_width) joiner(h=rail_height, w=joiner_width, l=7, a=joiner_angle);
}
}
up(rail_height/2) {
fwd(l/2+explode) {
if ($children > 0) children(0);
}
back(l/2+explode) {
if ($children > 1) children(1);
}
}
up(rail_height/2/2) {
back(l/2-10) {
left(rail_spacing/2+joiner_width+side_joiner_len) {
if ($children > 2) children(2);
}
right(rail_spacing/2+joiner_width+side_joiner_len) {
if ($children > 3) children(3);
}
}
}
}
}
//!z_base();
module z_base_parts() { // make me
//zrot(90)
z_base();
}
z_base_parts();
// vim: noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap