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 pos_web_thick = spike_web_thick + topwall_width*2;
  26
  27 module NegativePlan(){
  28   x4z =
  29     (spike_top_width - spike_botpos_width) /
  30     (main_height - spike_botpos_height);
  31
  32   x0 = (spike_botpos_width - x4z * spike_botpos_height)/2;
  33   x1 =  spike_top_width/2;
  34   z1 = main_height;
  35
  36   polygon([[ x0, -5],
  37            [ x0, 0],
  38            [ x1, z1],
  39            [ x1, z1+5],
  40            [-x1, z1+5],
  41            [-x1, z1],
  42            [-x0, 0],
  43            [-x0, -5]]);
  44 }
  45
  46 module SomeMidRounding(sq_size, z_extra) {
  47   translate([0,0,-z_extra])
  48     linear_extrude(height= main_height + z_extra*2)
  49     rotate(45)
  50     square( sq_size, center=true );
  51 }
  52
  53 module PositiveMidRounding(){
  54 //  translate([0,0,-5])
  55 //    linear_extrude(height= main_height + 10)
  56 //    rotate(45)
  57 //    square( spike_web_thick*2.5, center=true );
  58 }
  59
  60 module NegativeMidRounding(){
  61   SomeMidRounding(spike_web_thick*2.5, 5);
  62 }
  63
  64 module PositivePlan(){
  65   w = main_width;
  66   translate([ -w/2, 0 ])
  67     square([ w, main_height ]);
  68 }
  69
  70 module MultiplySolidifyPlan(th){
  71   for (r=[0,90]) {
  72     rotate([0,0,r])
  73       rotate([90,0,0])
  74       translate([0,0,-th/2])
  75       linear_extrude(height=th)
  76       children(0);
  77   }
  78 }
  79
  80 module MultiplyForMount(){
  81   for (r=[0:90:270])
  82     rotate([0,0,r])
  83     children(0);
  84 }
  85
  86 module Mount(){
  87   translate([ -1,
  88               -mount_width/2,
  89               0 ])
  90     cube([ mount_dist + mount_width/2 + 1,
  91            mount_width,
  92            mount_height ]);
  93 }
  94
  95 module MountHole(){
  96   translate([ mount_dist, 0,0 ]) {
  97     translate([0,0, -1])
  98       cylinder(r= mount_hole_dia/2, h= 20, $fn=20);
  99     translate([0,0, mount_hole_th])
 100       cylinder(r = mount_head_dia/2, h=20, $fn=20);
 101   }
 102 }
 103
 104 module Main(){
 105   difference(){
 106     union(){
 107       MultiplySolidifyPlan(pos_web_thick) PositivePlan();
 108       PositiveMidRounding();
 109       MultiplyForMount() Mount();
 110     }
 111     MultiplySolidifyPlan(spike_web_thick) NegativePlan();
 112     NegativeMidRounding();
 113     MultiplyForMount() MountHole();
 114   }
 115 }
 116
 117 module PlanTest(){
 118   linear_extrude(height=2.0){
 119     difference(){
 120       PositivePlan();
 121       NegativePlan();
 122     }
 123     difference(){
 124       circle(r = spike_botpos_width/2 + 5);
 125       circle(r = spike_botpos_width/2);
 126       translate([-50, 0]) square([100,50]);
 127     }
 128   }
 129   linear_extrude(height=4.0){
 130     difference(){
 131       translate([ -main_width/2, 0 ]) square([ main_width, 2 ]);
 132       NegativePlan();
 133     }
 134   }
 135 }
 136
 137 module MainFitTest(){
 138   intersection(){
 139     translate([0,0, -main_height + 0.5])
 140       Main();
 141     translate([-50,-50,0])
 142       cube([100,100,100]);
 143   }
 144 }
 145
 146 //PlanTest();
 147 //Main();
 148 MainFitTest();