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 WallThickness=0.75;
  20 ClipWidth=2.2;
  21 ClipDepth=0.75;
  22
  23 //ascfront=FLZ/sqrt(pow(FLZ,2)-pow(H,2));
  24 //asctop=(H-EZ)/sqrt(pow(BLX,2)-pow((H-EZ),2));
  25
  26 alpha=asin((H-EZ)/BLX);
  27 beta=asin(H/FLZ);
  28 gamma=90-asin((0.5*(AY-BY))/EZ);
  29
  30 module keycap(){
  31         scale([AX/(AX+2*CORNER_RADIUS),AY/(AY+2*CORNER_RADIUS),1])
  32         translate([CORNER_RADIUS,CORNER_RADIUS,0.01])
  33         minkowski(){
  34                 difference(){
  35                         cube([AX,AY,H]);
  36                         rotate(a=gamma,v=[1,0,0]) cube([100,100,100]);
  37                         translate([0,AY,0]) rotate(a=90-gamma,v=[1,0,0]) cube([100,100,100]);
  38                         translate([0,0,EZ]) rotate(a=-alpha,v=[0,1,0]) translate([-50,0,0]) cube([100,100,100]);
  39                         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,$fa=1);
  40                         translate([AX,0,0]) rotate(a=beta-90,v=[0,1,0]) cube([100,100,100]);
  41                 }
  42                 cylinder(h=0.01,r=CORNER_RADIUS,$fs=0.6);
  43                 //rotate(a=90,v=[1,0,0]) cylinder(h=0.01,r=1,$fs=0.3);
  44         }
  45 }
  46
  47 module blind_shaft(){
  48
  49 }
  50
  51 module shaft(){
  52         translate([0,0,-9]) difference(){
  53                 intersection(){
  54                         cylinder(h=100,r=SHAFT_X/2,$fs=0.3);
  55                         translate([-SHAFT_X/2,-SHAFT_Y/2,0]) cube([SHAFT_X,SHAFT_Y,100]);
  56                 }
  57                 intersection(){
  58                         cylinder(h=100,r=SHAFT_X/2-1,$fs=0.3);
  59                         translate([-SHAFT_X/2+1,-SHAFT_Y/2+1,0]) cube([SHAFT_X-2,SHAFT_Y-2,100]);
  60                 }
  61         }
  62 }
  63
  64 module guard(){
  65         difference(){
  66                 union(){
  67                         cube([1,100,100],center=true);
  68                         cube([100,1,100],center=true);
  69                         cylinder(r=OUTER_GUARD_RADIUS,h=100);
  70                 }
  71                 cylinder(r=INNER_GUARD_RADIUS,h=100);
  72         }
  73 }
  74
  75 difference(){
  76         keycap();
  77         difference(){
  78                 translate([WallThickness, WallThickness, 0]) scale(v=[1-2*WallThickness/AX, 1-2*WallThickness/AY, 1-WallThickness/H]) keycap();
  79                 translate([OUTER_GUARD_RADIUS+WallThickness,AY/2]) guard();
  80         }
  81 }
  82 intersection(){
  83         union(){
  84                 translate([WallThickness, WallThickness, 0]) scale(v=[1-2*WallThickness/AX, 1-2*WallThickness/AY, 1-WallThickness/H]) keycap();
  85                 translate([-50,-50,-99.9]) cube([100,100,100]);
  86         }
  87         translate([OUTER_GUARD_RADIUS+WallThickness,AY/2]) union(){
  88                 shaft();
  89         }
  90 }