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_y_offset = 0; // todo: use z_delta for y offset,
  21
  22 module adjustomatic() {
  23      difference() {
  24           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);
  25
  26           // these were translated -0.5 from block in wilson
  27           translate ([0, 0, -0.5]) {
  28                translate(v=[x_base_back() -adj_block_x/2 - 5,offs_adjuster_y,x_box_height-adj_block_z/2-8])
  29                     rotate([0,-30,0]) cube(size=[adj_block_x,adj_block_y+2,adj_block_z],center=true);
  30
  31                translate(v=[x_base_back() -adj_block_x/2 -1,offs_adjuster_y,x_box_height-adj_block_z/2-3])
  32                     cube(size=[adj_block_x,adj_block_y-2,adj_block_z-2],center=true);
  33
  34                translate(v=[x_base_back() -adj_block_x/2,offs_adjuster_y,x_box_height-adj_block_z/2+14]) {
  35                     rotate([0,0,30]) #cylinder(h = 4, r = 7.0/2 , $fn = 6);
  36                     translate([0,0,-20]) #cylinder(h=30,r=1.6,$fn=16);
  37                }
  38           }
  39      }
  40 }
  41
  42 // the endstop mount will be translated by this much (negative values
  43 // mean it moves away from the motor and toward the X carriage, giving
  44 // more room for leads and also extra space for the auto bedleveling
  45 // servo housing which is on this side of the extruder):
  46 endstop_sw_offs_adjust = -0;
  47
  48 module pocket_endstop() // endstop holder grafted onto the side toward the rods
  49 {
  50   translate([-7,-45,0])
  51     union() {
  52       // angled wall that attaches to the endstop holder
  53       translate([-1,18,0]) rotate([0,0,-30]) cube(size=[8.5,2,22]);
  54       // little bit of extra support at the bottom corner
  55       translate([-1.5,15.,2]) rotate([0,90,0]) cube(size=[2,3,10]);
  56
  57       difference() {
  58        translate([-1.5,endstop_sw_offs_adjust,0]) cube(size=[9,20.5,22]);
  59
  60        translate([-2,endstop_sw_offs_adjust,1]) cube(size=[7,21,22]);
  61        translate([0,15.5,8]) cube(size=[10,5,20]);
  62
  63        // screw holes for endstop switch
  64        translate([-2,7+endstop_sw_offs_adjust,1.5+5.5]) rotate([0,90,0]) cylinder(r=1.5,h=15);
  65        translate([-2,7+endstop_sw_offs_adjust,1.5+5.5+9.5]) rotate([0,90,0]) cylinder(r=1.5,h=15);
  66       }
  67     }
  68 }
  69
  70 module x_end_motor_sr() {
  71      sr_box_height = 12;
  72      translate([x_base_back(), x_base_outside(),x_box_height - sr_box_height]) {
  73           difference() {
  74                cube(size=[8,13+motor_y_offset,sr_box_height]);
  75                translate([4,12.5+motor_y_offset,sr_box_height-1]) rotate([0,90,0]) difference() {
  76                     cylinder(r=4.5,h=4,$fn=16,center=true);
  77                     translate([0,0,-1]) cylinder(r=2.5,h=7,$fn=16,center=true);
  78                }
  79                translate([9,11.6+motor_y_offset,sr_box_height]) rotate([0,45,90]) cube(size=[2,11,2]);
  80           }
  81      }
  82 }
  83
  84 module x_end_motor_base(){
  85  x_end_base();
  86  // motor arm
  87  translate(v=[x_base_back() + x_box_width/2,x_base_outside() + (44 + motor_y_offset)/2,26.5]) cube(size = [x_box_width,44+motor_y_offset*2,53], center = true);
  88  // z stop adjuster
  89  adjustomatic();
  90  // x endstop holder
  91  pocket_endstop();
  92 }
  93
  94 screw_head_r = 3.5;
  95
  96 module x_end_motor_holes(){
  97      x_end_holes();
  98      // Position to place
  99      translate(v=[-1,x_base_outside() + 44/2,x_motor_shaft_z ()]){
 100           // Belt hole
 101           translate(v=[-14,1,0]) cube(size = [10,46,44/2], center = true);
 102           // TODO: use built-in nema17 library to create holes
 103           // FIXME: ensure these maintain bolt length as x_box_width
 104           // increases (screw head holes need to be cut deeper)
 105
 106           translate ([0, motor_y_offset, 0]) {
 107                // Motor mounting holes
 108                // based on wilson x-ends, the intention here is to
 109                // leave a 11.5mm shaft for the screw
 110                motor_screwhead_depth = -x_base_back() - 11.5;
 111                #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);
 112                #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);
 113
 114
 115                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);
 116                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);
 117
 118
 119                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);
 120                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);
 121
 122
 123                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);
 124                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);
 125
 126                // Material saving cutout
 127                translate(v=[-10,12+motor_y_offset/2,10]) cube(size = [60,42 + motor_y_offset,42], center = true);
 128
 129                // Material saving cutout
 130                // todo (maybe...): if motor_y_offset is above 10 edge
 131                // becomes very sharp, but this is a pretty unrealistic
 132                // situation so might not be worth caring about.
 133                translate(v=[-10,40,-30]) rotate(a=[45,0,0])  cube(size = [60,43,42], center = true);
 134                // Motor shaft cutout
 135                translate(v=[0,0,0]) rotate(a=[0,-90,0]) rotate(a=[0,0,90]) cylinder(h = 70, r=17, $fn=6);
 136           }
 137      }
 138      // zip tie retainer for securing end stop wiring
 139      #translate([x_base_back() + x_box_width,x_base_inside() + 4.5/2,x_box_height - 8 - bushing_xy[0]*2]) difference() { cylinder(r=4.5,h=4,$fn=16);
 140           translate([0,0,-1]) cylinder(r=2.5,h=7,$fn=16);
 141      }
 142      #translate([x_base_back() + x_box_width,-bushing_z[2]/2 - 1,x_box_height]) rotate([90,0,0]) difference() { cylinder(r=4.5,h=4,$fn=16,center=true);
 143           translate([0,0,-1]) cylinder(r=2.5,h=7,$fn=16,center=true);
 144      }
 145 }
 146
 147 module x_end_motor_pulley () {
 148      // todo: y alignment uses magic expression "x_base_outside() + 44/2 + motor_y_offset" copies from motor mount translate
 149      // todo: x alignment uses magic expression "(x_box_width-10)/2"
 150      //       to move past back wall of x-end, will need to be
 151      //       adjusted if slot width is made to dynamically adjust or
 152      //       is changed in size
 153      translate ([x_base_back() + motor_pulley[1]/2 + (x_box_width-10)/2, x_base_outside() + 44/2 + motor_y_offset, x_motor_shaft_z ()]) {
 154           rotate ([0, 90, 0]) {
 155                difference () {
 156                     cylinder (d=motor_pulley[0], h=motor_pulley[1], center=true);
 157                translate ([0, 0, -0.01]) cylinder (d=motor_pulley[2], h=motor_pulley[1]+0.03, center=true);
 158                }
 159           }
 160      }
 161 }
 162
 163 // Final part
 164 module x_end_motor(){
 165  difference(){
 166   x_end_motor_base();
 167   x_end_motor_holes();
 168  }
 169  // strain relief (zip tie point) below the motor
 170  x_end_motor_sr();
 171  %x_end_motor_pulley();
 172 }
 173
 174 //rotate([0,0,180])
 175 x_end_motor();