From 7514706b5766963cd0eb1e0f695120be8c84e288 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 24 Jan 2016 15:43:54 +0000
Subject: [PATCH] filamentspool: FilamentGuideArm: wip

---
 filamentspool.scad | 44 +++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 41 insertions(+), 3 deletions(-)

diff --git a/filamentspool.scad b/filamentspool.scad
index 637a72a..33ccba1 100644
--- a/filamentspool.scad
+++ b/filamentspool.scad
@@ -751,17 +751,30 @@ guidearm_hookprotr = 4;
 guidearm_hookprotrflat = 1;
 guidearm_hookslope = 0.3;
 
+guidearm_totallen = 60;
+
+guidearm_screwplatesz = 12;
+guidearm_screwplateth = 4;
+guidearm_screwhole = 4 + 0.5;
+
+guidearm_bendlen = 50;
+
 // calculated
 
 guidearm_armdia = guide_armdia - guidearm_armslop;
 guidearm_armwidth = guide_armwidth - guidearm_armslop;
 guidearm_armcorelen = guide_armcorelen + guidearm_armlenslop;
 
+guidearm_base_z0 = -(guidearm_totallen - guidearm_armcorelen);
+
+guidearm_realbendlen = max(guidearm_bendlen,
+			   guidearm_totallen - guidearm_screwplateth - 0.1);
+
 module FilamentGuideArmShaftPositive(){
   r = guidearm_armdia/2;
 
-  translate([0,0,-1])
-    cylinder(r=r, h= guidearm_armcorelen+2);
+  translate([0,0, guidearm_base_z0+1])
+    cylinder(r=r, h= guidearm_totallen);
   translate([0,0, guidearm_armcorelen]){
     hull(){
       for (ts=[-1,+1]) {
@@ -774,8 +787,33 @@ module FilamentGuideArmShaftPositive(){
   }
 }
 
+module FilamentGuideArmBase(){
+  translate([0,0, guidearm_base_z0]){
+    difference(){
+      translate([0,0, guidearm_screwplateth/2])
+	cube(center=true,
+	     [guidearm_armdia + guidearm_screwplatesz*2,
+	      guidearm_armwidth,
+	      guidearm_screwplateth]);
+      for (ts=[-1,+1]) {
+	translate([ts * (guidearm_armdia/2 + guidearm_screwplatesz/2),
+		   0,
+		   -20])
+	  cylinder(r= guidearm_screwhole/2, h=40);
+      }
+    }
+  }
+}
+
 module FilamentGuideArm(){ ///toplevel
-  FilamentGuideArmShaftPositive();
+  intersection(){
+    FilamentGuideArmShaftPositive();
+    cube(center=true,
+	 [guidearm_armdia*2,
+	  guidearm_armwidth,
+	  guidearm_totallen*3]);
+  }
+  FilamentGuideArmBase();
 }
 
 
-- 
2.30.2