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 mount_dist = 20;
  15 mount_width = 10;
  16 mount_height = 5;
  17 mount_hole_dia = 4.5;
  18 mount_head_dia = 7.5;
  19 mount_hole_th = 2.5;
  20
  21 // calculated
  22
  23 main_width = spike_top_width + topwall_width*2;
  24
  25 module NegativePlan(){
  26   x4z =
  27     (spike_top_width - spike_botpos_width) /
  28     (main_height - spike_botpos_height);
  29
  30   x0 = (spike_botpos_width - x4z * spike_botpos_height)/2;
  31   x1 =  spike_top_width/2;
  32   z1 = main_height;
  33
  34   polygon([[ x0, -5],
  35            [ x0, 0],
  36            [ x1, z1],
  37            [ x1, z1+5],
  38            [-x1, z1+5],
  39            [-x1, z1],
  40            [-x0, 0],
  41            [-x0, -5]]);
  42 }
  43
  44 module PositivePlan(){
  45   w = main_width;
  46   translate([ -w/2, 0 ])
  47     square([ w, main_height ]);
  48 }
  49
  50 module MultiplySolidifyPlan(th){
  51   for (r=[0,90]) {
  52     rotate([0,0,r])
  53       rotate([90,0,0])
  54       translate([0,0,-th/2])
  55       linear_extrude(height=th)
  56       children(0);
  57   }
  58 }
  59
  60 module MultiplyForMount(){
  61   for (r=[0:90:270])
  62     rotate([0,0,r])
  63     children(0);
  64 }
  65
  66 module Mount(){
  67   translate([ -1,
  68               -mount_width/2,
  69               0 ])
  70     cube([ mount_dist + mount_width/2 + 1,
  71            mount_width,
  72            mount_height ]);
  73 }
  74
  75 module MountHole(){
  76   translate([ mount_dist, 0,0 ]) {
  77     translate([0,0, -1])
  78       cylinder(r= mount_hole_dia/2, h= 20, $fn=20);
  79     translate([0,0, mount_hole_th])
  80       cylinder(r = mount_head_dia/2, h=20, $fn=20);
  81   }
  82 }
  83
  84 module Main(){
  85   difference(){
  86     union(){
  87       MultiplySolidifyPlan(spike_web_thick + topwall_width*2) PositivePlan();
  88       MultiplyForMount() Mount();
  89     }
  90     MultiplySolidifyPlan(spike_web_thick) NegativePlan();
  91     MultiplyForMount() MountHole();
  92   }
  93 }
  94
  95 module PlanTest(){
  96   linear_extrude(height=2.0){
  97     difference(){
  98       PositivePlan();
  99       NegativePlan();
 100     }
 101     difference(){
 102       circle(r = spike_botpos_width/2 + 5);
 103       circle(r = spike_botpos_width/2);
 104       translate([-50, 0]) square([100,50]);
 105     }
 106   }
 107   linear_extrude(height=4.0){
 108     difference(){
 109       translate([ -main_width/2, 0 ]) square([ main_width, 2 ]);
 110       NegativePlan();
 111     }
 112   }
 113 }
 114
 115 //PlanTest();
 116 Main();