shift.scad

   1 //measures are in millimeters
   2 AY=23.0;
   3 AX=19.0;
   4 BY=18.0;
   5 BLX=14.5;
   6 EZ=11.0;
   7 FLZ=14.0;
   8 H=12.75;
   9 CYL_OFF_Z=70;
  10 CYL_DEPTH=0.1;
  11 CLIP_X=2;
  12 CLIP_Y=0.75;
  13 CLIP_H=3*CLIP_Y;
  14 CORNER_RADIUS=2;
  15 INNER_GUARD_RADIUS=6.5;
  16 OUTER_GUARD_RADIUS=7.5;
  17 SHAFT_X=8.0;
  18 SHAFT_Y=6.0;
  19 SHAFT_LENGTH=9.0;
  20 SHAFT_THICKNESS=1.0;
  21 SHAFT_CLIP_WIDTH=3.0;
  22 SHAFT_CLIP_THICKNESS=0.75;
  23 SHAFT_CLIP_HEIGHT=2.0;
  24 SHAFT_CLIP_SLOPE_DEPTH=1.0;
  25 SHAFT_CLIP_ANGLE=45;
  26 SHAFT_END_CUTOUT_HEIGHT=1.5;
  27 SHAFT_LARGE_SLOT_TO_BASE=1.5;
  28 WallThickness=0.75;
  29 ClipWidth=2.2;
  30 ClipDepth=0.75;
  31
  32 //ascfront=FLZ/sqrt(pow(FLZ,2)-pow(H,2));
  33 //asctop=(H-EZ)/sqrt(pow(BLX,2)-pow((H-EZ),2));
  34
  35 alpha=asin((H-EZ)/BLX);
  36 beta=asin(H/FLZ);
  37 gamma=90-asin((0.5*(AY-BY))/EZ);
  38
  39 module keycap(){
  40         scale([AX/(AX+2*CORNER_RADIUS),AY/(AY+2*CORNER_RADIUS),1])
  41         translate([CORNER_RADIUS,CORNER_RADIUS,0.01])
  42         minkowski(){
  43                 difference(){
  44                         cube([AX,AY,H]);
  45                         rotate(a=gamma,v=[1,0,0]) cube([100,100,100]);
  46                         translate([0,AY,0]) rotate(a=90-gamma,v=[1,0,0]) cube([100,100,100]);
  47                         translate([0,0,EZ]) rotate(a=-alpha,v=[0,1,0]) translate([-50,0,0]) cube([100,100,100]);
  48                         translate([0,AY/2,EZ+CYL_OFF_Z]) rotate(a=90-alpha,v=[0,1,0]) cylinder(h=100,center=true,r=CYL_OFF_Z+CYL_DEPTH,$fa=1);
  49                         translate([AX,0,0]) rotate(a=beta-90,v=[0,1,0]) cube([100,100,100]);
  50                 }
  51                 cylinder(h=0.01,r=CORNER_RADIUS,$fs=0.6);
  52                 //rotate(a=90,v=[1,0,0]) cylinder(h=0.01,r=1,$fs=0.3);
  53         }
  54 }
  55
  56 module blind_shaft(){
  57
  58 }
  59
  60 module shaft(){
  61         translate([0,0,-SHAFT_LENGTH]) difference(){
  62                 union(){
  63                         difference(){
  64                                 intersection(){
  65                                         cylinder(h=100,r=SHAFT_X/2,$fs=0.3);
  66                                         translate([-SHAFT_X/2,-SHAFT_Y/2,0]) cube([SHAFT_X,SHAFT_Y,100]);
  67                                 }
  68                                 intersection(){
  69                                         cylinder(h=100,r=SHAFT_X/2-SHAFT_THICKNESS,$fs=0.3);
  70                                         translate([-SHAFT_X/2+SHAFT_THICKNESS,-SHAFT_Y/2+SHAFT_THICKNESS,0]) cube([SHAFT_X-2*SHAFT_THICKNESS,SHAFT_Y-2*SHAFT_THICKNESS,100]);
  71                                 }
  72                         }
  73                         translate([-SHAFT_CLIP_WIDTH/2, -SHAFT_CLIP_THICKNESS-SHAFT_Y/2,0]) cube([SHAFT_CLIP_WIDTH/2, SHAFT_CLIP_THICKNESS,SHAFT_CLIP_HEIGHT]);
  74                         translate([-SHAFT_CLIP_WIDTH/2, SHAFT_Y/2,0]) cube([SHAFT_CLIP_WIDTH/2, SHAFT_CLIP_THICKNESS,SHAFT_CLIP_HEIGHT]);
  75                 }
  76                 translate([-SHAFT_CLIP_WIDTH/2, -SHAFT_CLIP_THICKNESS-SHAFT_Y/2+SHAFT_CLIP_SLOPE_DEPTH,0]) rotate(a=90+SHAFT_CLIP_ANGLE,v=[1,0,0]) cube([SHAFT_CLIP_WIDTH/2,100,100]);
  77                 translate([-SHAFT_CLIP_WIDTH/2, SHAFT_Y/2+SHAFT_CLIP_THICKNESS-SHAFT_CLIP_SLOPE_DEPTH,0]) mirror([0,1,0]) rotate(a=90+SHAFT_CLIP_ANGLE,v=[1,0,0]) cube([SHAFT_CLIP_WIDTH/2,100,100]);
  78                 translate([0,-50,0]) cube([100,100,SHAFT_END_CUTOUT_HEIGHT]);
  79                 translate([0,-SHAFT_Y/2+SHAFT_THICKNESS,0]) cube([100,SHAFT_Y-SHAFT_THICKNESS*2,SHAFT_LENGTH+SHAFT_LARGE_SLOT_TO_BASE]);
  80         }
  81 }
  82
  83 module guard(){
  84         difference(){
  85                 union(){
  86                         cube([1,100,100],center=true);
  87                         cube([100,1,100],center=true);
  88                         cylinder(r=OUTER_GUARD_RADIUS,h=100);
  89                 }
  90                 cylinder(r=INNER_GUARD_RADIUS,h=100);
  91         }
  92 }
  93
  94 difference(){
  95         keycap();
  96         difference(){
  97                 translate([WallThickness, WallThickness, 0]) scale(v=[1-2*WallThickness/AX, 1-2*WallThickness/AY, 1-WallThickness/H]) keycap();
  98                 translate([OUTER_GUARD_RADIUS+WallThickness,AY/2]) guard();
  99         }
 100 }
 101 intersection(){
 102         union(){
 103                 translate([WallThickness, WallThickness, 0]) scale(v=[1-2*WallThickness/AX, 1-2*WallThickness/AY, 1-WallThickness/H]) keycap();
 104                 translate([-50,-50,-99.9]) cube([100,100,100]);
 105         }
 106         translate([OUTER_GUARD_RADIUS+WallThickness,AY/2]) union(){
 107                 shaft();
 108         }
 109 }