From c36f7b9afffdf4fd363ed5abb5a8bd2b4644aec8 Mon Sep 17 00:00:00 2001
From: Michael Krelin <hacker@klever.net>
Date: Sun, 26 Aug 2018 18:49:25 +0000
Subject: move spring closer

---
diff --git a/another.scad b/another.scad
index 78d4320..b752f30 100644
--- a/another.scad
+++ b/another.scad
@@ -81,7 +81,7 @@ module the_extruder(
  lever_shell = mount_screwhead_h+0.5;
  lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell);
  lsd = idler_d-idler_clearance*2;
- longwing=gearbox_d/2+spring_d/2+lsd/2;
+ longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+extrusion_width;
  shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2))
              sqrt(c*c+pow(a-c,2));
  longwing_travel = idler_travel*longwing/shortwing;
@@ -235,42 +235,18 @@ module the_extruder(
   difference() {
    union() {
     cylinder(d=gearbox_d,h=body_h,$fn=fnd*gearbox_d);
-    translate([-gearbox_d/2,0,0]) difference() {
-     union() {
-      hull() {
-       translate([0,-longwing,ls_z])
-       rotate([0,90,0])
-       cylinder(d=lever_thickness,h=fsw,$fn=fnd*lever_thickness);
-       hh=body_h-ls_z;
-       translate([0,0,ls_z])
-       mirror([0,1,0]) cube(size=[fsw,longwing+(st_thinshell+st_split_w_tolerance)/2+st_thickshell,body_h-ls_z]);
-       hhh=ls_z;
-       translate([0,0,0])
-       mirror([0,1,0]) cube(size=[fsw,longwing-hhh+lever_thickness/sqrt(2),hhh+lever_thickness/2]);
-      }
-     }
-     translate([0,-longwing,ls_z]) rotate([0,-90,0]) {
-      if(!tensioner) finger_indent(d=lever_thickness-1,r=15); else {
-       mirror([0,0,1]) {
-	translate([0,0,st_thickshell])
-	hull() for(o=[0,spring_d]) translate([0,-o,0])
-	rotate([0,0,30])
-	cylinder(d=st_nut_d+st_nut_d_tolerance,h=st_nut_h+st_nut_h_tolerance,$fn=6);
-	translate([0,0,-1]) cylinder(d=st_screw_d+st_screw_d_tolerance,h=fsw+2,$fn=fnd*(st_screw_d+st_screw_d_tolerance));
-	bigd = spring_d+spring_d_clearance;
-	hf = (bigd-st_screw_d-st_screw_d_tolerance)/2;
-	translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell-epsilon]) {
-	 cylinder(d1=st_screw_d+st_screw_d_tolerance,d2=bigd,
-	  h=hf+epsilon, $fn=fnd*bigd);
-	 translate([0,-(st_thinshell+st_split_w_tolerance)/2,0])
-	 cube(size=[body_h-ls_z+1,st_thinshell+st_split_w_tolerance,fsw+1]);
-	}
-	translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon])
-	cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd);
-       }
-      }
-     }
-    } // translate
+    // spring tensioner part
+    translate([-gearbox_d/2,0,0]) hull() {
+     translate([0,-longwing,ls_z])
+     rotate([0,90,0])
+     cylinder(d=lever_thickness,h=fsw,$fn=fnd*lever_thickness);
+     hh=body_h-ls_z;
+     translate([0,0,ls_z])
+     mirror([0,1,0]) cube(size=[fsw,longwing+(st_thinshell+st_split_w_tolerance)/2+st_thickshell,body_h-ls_z]);
+     hhh=ls_z;
+     translate([0,0,0])
+     mirror([0,1,0]) cube(size=[fsw,longwing-hhh+lever_thickness/sqrt(2),hhh+lever_thickness/2]);
+    }//hull translate
     
     // pushfit bracket
     translate([0,0,filament_elevation])
@@ -386,6 +362,29 @@ module the_extruder(
     translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4);
    }
 
+   // spring tensioner
+   translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) {
+    if(!tensioner) finger_indent(d=lever_thickness-1,r=15); else {
+     mirror([0,0,1]) {
+      translate([0,0,st_thickshell])
+      hull() for(o=[0,spring_d]) translate([0,-o,0])
+      rotate([0,0,30])
+      cylinder(d=st_nut_d+st_nut_d_tolerance,h=st_nut_h+st_nut_h_tolerance,$fn=6);
+      translate([0,0,-1]) cylinder(d=st_screw_d+st_screw_d_tolerance,h=fsw+2,$fn=fnd*(st_screw_d+st_screw_d_tolerance));
+      bigd = spring_d+spring_d_clearance;
+      hf = (bigd-st_screw_d-st_screw_d_tolerance)/2;
+      translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell-epsilon]) {
+       cylinder(d1=st_screw_d+st_screw_d_tolerance,d2=bigd,
+        h=hf+epsilon, $fn=fnd*bigd);
+       translate([0,-(st_thinshell+st_split_w_tolerance)/2,0])
+       cube(size=[body_h-ls_z+1,st_thinshell+st_split_w_tolerance,fsw+1]);
+      }
+      translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon])
+      cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd);
+     }
+    }
+   }
+
   }//difference
 
   if(supports) intersection() {
--
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