sprinkler-spike-receptacle.scad

   1 // -*- C -*-
   2
   3 main_height = 95;
   4
   5 spike_web_thick = 2.52 + 0.5;
   6
   7 spike_top_width = 21.04;
   8
   9 spike_botpos_height = 9.5;
  10 spike_botpos_width = 11.68;
  11
  12 topwall_width = 1.5;
  13
  14 // calculated
  15
  16 main_width = spike_top_width + topwall_width*2;
  17
  18 module NegativePlan(){
  19   x4z =
  20     (spike_top_width - spike_botpos_width) /
  21     (main_height - spike_botpos_height);
  22
  23   x0 = (spike_botpos_width - x4z * spike_botpos_height)/2;
  24   x1 =  spike_top_width/2;
  25   z1 = main_height;
  26
  27   polygon([[ x0, -5],
  28            [ x0, 0],
  29            [ x1, z1],
  30            [ x1, z1+5],
  31            [-x1, z1+5],
  32            [-x1, z1],
  33            [-x0, 0],
  34            [-x0, -5]]);
  35 }
  36
  37 module PositivePlan(){
  38   w = main_width;
  39   translate([ -w/2, 0 ])
  40     square([ w, main_height ]);
  41 }
  42
  43 module MultiplySolidifyPlan(th){
  44   for (r=[0,90]) {
  45     rotate([0,0,r])
  46       rotate([90,0,0])
  47       translate([0,0,-th/2])
  48       linear_extrude(height=th)
  49       children(0);
  50   }
  51 }
  52
  53 module Main(){
  54   difference(){
  55     union(){
  56       MultiplySolidifyPlan(spike_web_thick + topwall_width*2) PositivePlan();
  57     }
  58     MultiplySolidifyPlan(spike_web_thick) NegativePlan();
  59   }
  60 }
  61
  62 module PlanTest(){
  63   linear_extrude(height=2.0){
  64     difference(){
  65       PositivePlan();
  66       NegativePlan();
  67     }
  68     difference(){
  69       circle(r = spike_botpos_width/2 + 5);
  70       circle(r = spike_botpos_width/2);
  71       translate([-50, 0]) square([100,50]);
  72     }
  73   }
  74   linear_extrude(height=4.0){
  75     difference(){
  76       translate([ -main_width/2, 0 ]) square([ main_width, 2 ]);
  77       NegativePlan();
  78     }
  79   }
  80 }
  81
  82 //PlanTest();
  83 Main();