z-axis: shift mounts to under parts

[clinton/prusa3.git] / box_frame / x-end-idler.scad

// PRUSA iteration3
// X end idler
// GNU GPL v3
// Josef Průša <iam@josefprusa.cz> and contributors
// http://www.reprap.org/wiki/Prusa_Mendel
// http://prusamendel.org
// Alterations for reprap wilson by M. Rice <mrice411@gmail.com>

include <configuration.scad>
use <x-end.scad>
use <inc/bearing-guide.scad>
use <y-drivetrain.scad>

// todo:

//  - restore y and z offsets. shift y with bearing_z, z with
//    idler_bearing diameter to maintain a straight belt line

module x_end_idler_base(){
 x_end_base();
}

module x_end_idler_holes(){
 x_end_holes();

 // tensioner mount
 translate([-20, -15 - z_delta / 2, 30]) {
      rotate([0, 90, 0]) cylinder(r=m4_diameter / 2, h=33, center=true, $fn=small_hole_segments);
      translate([15 - 2 * single_wall_width, 0, 0]) rotate([90, 0, 90]) cylinder(r=m4_nut_diameter_horizontal / 2, h=3, $fn=6);
 }
 // create a notch for the X tensioner, to improve the length of
 // travel available
 // todo: doesn't scale with size of idler bearing correctly
 translate (v=[x_base_back() + x_box_width/2,(-sqrt(2)*22)/2 + x_base_inside() + idler_bearing[0],x_box_height/2]) difference()  {
      rotate(a=[45,0,0])  cube(size=[x_box_width*2,22,22],center=true);
      translate(v=[0,14,0]) cube(size=[x_box_width*2,4,8],center=true);
 }
}

// Final part
module x_end_idler(){
 mirror([0,1,0]) difference(){
  x_end_idler_base();
  x_end_idler_holes();
 }

 %translate([-14 - xy_delta / 2, 25, 30.5 - (max(idler_width, 16) / 2)]) x_tensioner();
}

module x_tensioner(len=50, idler_height=max(idler_bearing[0], 16)) {
     // todo: scal narrow_width with size of belt hole, if that becomes scalable
     idlermount(len=len, rod=m4_diameter / 2 + 0.5, idler_height=idler_height, narrow_len=30, narrow_width=9);
}

translate([-40, 0, 4 - bushing_xy[0]]) x_tensioner();

x_end_idler();

if (idler_bearing[3] == 1) {  // bearing guides
    translate([-39,  -60 - idler_bearing[0] / 2, 4 - bushing_xy[0]]) rotate([0, 0, 55]) {
        render() bearing_assy();
    }
}