From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 14 Aug 2016 13:40:29 +0000 (+0100)
Subject: pump-inframe-bracket: wip, have (most of) MainPlan
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=4d3af939428942eb40d17c3203ce5f0cd38b314e;p=reprap-play.git

pump-inframe-bracket: wip, have (most of) MainPlan
---

diff --git a/pump-inframe-bracket.scad b/pump-inframe-bracket.scad
index 8eebd70..edfb6e9 100644
--- a/pump-inframe-bracket.scad
+++ b/pump-inframe-bracket.scad
@@ -8,13 +8,31 @@ backflange_d = 12;
 
 back_gap = 7;
 main_th = 2.5;
+midweb_d = 3;
 
 // calculated
 
+front_th = main_th;
+
 tube_or = tube_dia/2 + main_th;
 back_ohw = back_gap/2 + main_th;
 backflange_ymin = tube_or+backflange_d;
 
+pump_0y = tube_dia/2 + pump_d/2 + midweb_d;
+
+pump_or = [pump_w, pump_d]/2 + [front_th,front_th];
+
+module oval(sz){ // sz[0] > sz[1]
+  xr = sz[0];
+  yr = sz[1];
+  hull(){
+    for (sx=[-1,+1]) {
+      translate([sx * (xr-yr), 0])
+	circle(r=yr);
+    }
+  }
+}
+
 module MainPlan(){
   difference(){
     union(){
@@ -26,6 +44,14 @@ module MainPlan(){
     translate([-back_gap/2,1]) mirror([0,1])
       square([back_gap, backflange_ymin+2]);
   }
+  translate([0, pump_0y]){
+    difference(){
+      union(){
+	oval(pump_or);
+      }
+      oval([pump_w/2, pump_d/2]);
+    }
+  }
 }
 
 MainPlan();