box_frame/x-end-motor.scad

   1 // PRUSA iteration3
   2 // X end motor
   3 // GNU GPL v3
   4 // Josef Průša <iam@josefprusa.cz> and contributors
   5 // http://www.reprap.org/wiki/Prusa_Mendel
   6 // http://prusamendel.org
   7 // Alterations for reprap Wilson by Martin Rice <mrice411@gmail.com>
   8
   9 include <configuration.scad>
  10 use <x-end.scad>
  11
  12 adj_block_x = 9;
  13 adj_block_y = 10;
  14 adj_block_z = 32;
  15
  16 // fixme: if we keep this, needs to adjust based on size of bushing_z
  17 // to clear the side of the plate
  18 offs_adjuster_y = x_base_outside() - adj_block_y/2;
  19
  20 motor_offs_z = 0; // todo: broken, not sure if useful -- adjust based on bearing size to keep straight belt line?
  21 motor_y_offset = 0; // todo: use z_delta for y offset,
  22
  23 module adjustomatic() {
  24      difference() {
  25           translate(v=[x_base_back() - adj_block_x/2,offs_adjuster_y,x_box_height - adj_block_z/2]) cube(size=[adj_block_x,adj_block_y,adj_block_z],center=true);
  26
  27           // these were translated -0.5 from block in wilson
  28           translate ([0, 0, -0.5]) {
  29                translate(v=[x_base_back() -adj_block_x/2 - 5,offs_adjuster_y,x_box_height-adj_block_z/2-8])
  30                     rotate([0,-30,0]) cube(size=[adj_block_x,adj_block_y+2,adj_block_z],center=true);
  31
  32                translate(v=[x_base_back() -adj_block_x/2 -1,offs_adjuster_y,x_box_height-adj_block_z/2-3])
  33                     cube(size=[adj_block_x,adj_block_y-2,adj_block_z-2],center=true);
  34
  35                translate(v=[x_base_back() -adj_block_x/2,offs_adjuster_y,x_box_height-adj_block_z/2+14]) {
  36                     rotate([0,0,30]) #cylinder(h = 4, r = 7.0/2 , $fn = 6);
  37                     translate([0,0,-20]) #cylinder(h=30,r=1.6,$fn=16);
  38                }
  39           }
  40      }
  41 }
  42
  43 // the endstop mount will be translated by this much (negative values
  44 // mean it moves away from the motor and toward the X carriage, giving
  45 // more room for leads and also extra space for the auto bedleveling
  46 // servo housing which is on this side of the extruder):
  47 endstop_sw_offs_adjust = -0;
  48
  49 module pocket_endstop() // endstop holder grafted onto the side toward the rods
  50 {
  51   translate([-7,-45,0])
  52     union() {
  53       // angled wall that attaches to the endstop holder
  54       translate([-1,18,0]) rotate([0,0,-30]) cube(size=[8.5,2,22]);
  55       // little bit of extra support at the bottom corner
  56       translate([-1.5,15.,2]) rotate([0,90,0]) cube(size=[2,3,10]);
  57
  58       difference() {
  59        translate([-1.5,endstop_sw_offs_adjust,0]) cube(size=[9,20.5,22]);
  60
  61        translate([-2,endstop_sw_offs_adjust,1]) cube(size=[7,21,22]);
  62        translate([0,15.5,8]) cube(size=[10,5,20]);
  63
  64        // screw holes for endstop switch
  65        translate([-2,7+endstop_sw_offs_adjust,1.5+5.5]) rotate([0,90,0]) cylinder(r=1.5,h=15);
  66        translate([-2,7+endstop_sw_offs_adjust,1.5+5.5+9.5]) rotate([0,90,0]) cylinder(r=1.5,h=15);
  67       }
  68     }
  69 }
  70
  71 module x_end_motor_sr() {
  72      sr_box_height = 12;
  73      translate([x_base_back(), x_base_outside(),x_box_height - sr_box_height]) {
  74           difference() {
  75                cube(size=[8,13+motor_y_offset,sr_box_height]);
  76                translate([4,12.5+motor_y_offset,sr_box_height-1]) rotate([0,90,0]) difference() {
  77                     cylinder(r=4.5,h=4,$fn=16,center=true);
  78                     translate([0,0,-1]) cylinder(r=2.5,h=7,$fn=16,center=true);
  79                }
  80                translate([9,11.6+motor_y_offset,sr_box_height]) rotate([0,45,90]) cube(size=[2,11,2]);
  81           }
  82      }
  83 }
  84
  85 module x_end_motor_base(){
  86  x_end_base();
  87  // motor arm
  88  translate(v=[x_base_back() + x_box_width/2,x_base_outside() + (44 + motor_y_offset)/2,26.5+motor_offs_z]) cube(size = [x_box_width,44+motor_y_offset*2,53], center = true);
  89  // z stop adjuster
  90  adjustomatic();
  91  // x endstop holder
  92  pocket_endstop();
  93 }
  94
  95 screw_head_r = 3.5;
  96
  97 module x_end_motor_holes(){
  98      x_end_holes();
  99      // Position to place
 100      translate(v=[-1,x_base_outside() + 44/2,30.25+motor_offs_z]){
 101           // Belt hole
 102           translate(v=[-14,1,0]) cube(size = [10,46,44/2], center = true);
 103           // TODO: use built-in nema17 library to create holes
 104           // FIXME: ensure these maintain bolt length as x_box_width
 105           // increases (screw head holes need to be cut deeper)
 106
 107           translate ([0, motor_y_offset, 0]) {
 108                // Motor mounting holes
 109                // based on wilson x-ends, the intention here is to
 110                // leave a 11.5mm shaft for the screw
 111                motor_screwhead_depth = -x_base_back() - 11.5;
 112                #translate(v=[20,-15.5,-15.5]) rotate(a=[0,-90,0]) rotate(a=[0,0,90]) cylinder(h = 70, r=1.8, $fn=30);
 113                #translate(v=[1,-15.5,-15.5]) rotate(a=[0,-90,0]) rotate(a=[0,0,90]) cylinder(h = motor_screwhead_depth, r=screw_head_r, $fn=30);
 114
 115
 116                translate(v=[20,-15.5,15.5]) rotate(a=[0,-90,0]) rotate(a=[0,0,90]) cylinder(h = 70, r=1.8, $fn=30);
 117                translate(v=[1,-15.5,15.5]) rotate(a=[0,-90,0]) rotate(a=[0,0,90]) cylinder(h = motor_screwhead_depth, r=screw_head_r, $fn=30);
 118
 119
 120                translate(v=[20,15.5,-15.5]) rotate(a=[0,-90,0]) rotate(a=[0,0,90]) cylinder(h = 70, r=1.8, $fn=30);
 121                translate(v=[1,15.5,-15.5]) rotate(a=[0,-90,0]) rotate(a=[0,0,90]) cylinder(h = motor_screwhead_depth, r=screw_head_r, $fn=30);
 122
 123
 124                translate(v=[20,15.5,15.5]) rotate(a=[0,-90,0]) rotate(a=[0,0,90]) cylinder(h = 70, r=1.8, $fn=30);
 125                translate(v=[1,15.5,15.5]) rotate(a=[0,-90,0]) rotate(a=[0,0,90]) cylinder(h = motor_screwhead_depth, r=screw_head_r, $fn=30);
 126
 127                // Material saving cutout
 128                translate(v=[-10,12+motor_y_offset/2,10]) cube(size = [60,42 + motor_y_offset,42], center = true);
 129
 130                // Material saving cutout
 131                // todo (maybe...): if motor_y_offset is above 10 edge
 132                // becomes very sharp, but this is a pretty unrealistic
 133                // situation so might not be worth caring about.
 134                translate(v=[-10,40,-30]) rotate(a=[45,0,0])  cube(size = [60,43,42], center = true);
 135                // Motor shaft cutout
 136                translate(v=[0,0,0]) rotate(a=[0,-90,0]) rotate(a=[0,0,90]) cylinder(h = 70, r=17, $fn=6);
 137           }
 138      }
 139      // zip tie retainer for securing end stop wiring
 140      #translate([x_base_back() + x_box_width,x_base_inside() + 4.5/2,x_box_height - 8 - bushing_xy[0]*2]) difference() { cylinder(r=4.5,h=4,$fn=16);
 141           translate([0,0,-1]) cylinder(r=2.5,h=7,$fn=16);
 142      }
 143      #translate([x_base_back() + x_box_width,-bushing_z[2]/2 - 1,x_box_height]) rotate([90,0,0]) difference() { cylinder(r=4.5,h=4,$fn=16,center=true);
 144           translate([0,0,-1]) cylinder(r=2.5,h=7,$fn=16,center=true);
 145      }
 146 }
 147
 148 // Final part
 149 module x_end_motor(){
 150  difference(){
 151   x_end_motor_base();
 152   x_end_motor_holes();
 153  }
 154  // strain relief (zip tie point) below the motor
 155  x_end_motor_sr();
 156 }
 157
 158 rotate([0,0,180])
 159 x_end_motor();