From 0f096a81ab50e7dd4a9e949f7b4c49e701d3652c Mon Sep 17 00:00:00 2001
From: Michael Krelin <hacker@klever.net>
Date: Fri, 10 Aug 2018 09:42:10 +0000
Subject: another: add tensioner screw tolerance

---
diff --git a/another.scad b/another.scad
index 7a3b0ac..da5f695 100644
--- a/another.scad
+++ b/another.scad
@@ -57,6 +57,7 @@ module the_extruder(
  knob_bore_d_tolerance=.6,
  st_nut_h_tolerance=.2,
  st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */
+ st_screw_d_tolerance=.3,
 
  what="lever",  // lever|body|knob|springpad|*
  left=false,
@@ -216,11 +217,11 @@ module the_extruder(
 	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,$fn=6);
-	translate([0,0,-1]) cylinder(d=st_screw_d,h=fsw+2,$fn=fnd*st_screw_d);
+	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)/2;
+	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,d2=bigd,
+	cylinder(d1=st_screw_d+st_screw_d_tolerance,d2=bigd,
 	 h=hf+epsilon, $fn=fnd*bigd);
 	translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon])
 	cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd);
@@ -335,7 +336,7 @@ module the_extruder(
  }//body module
 
  module springpad() {
-  smalld=st_screw_d+2*extrusion_width;
+  smalld=st_screw_d+st_screw_d_tolerance+2*extrusion_width;
   bigd = spring_d+spring_d_clearance/2;
   hf = (bigd-smalld)/2;
   translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation])
@@ -348,7 +349,7 @@ module the_extruder(
     sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4);
    }
    translate([0,0,-epsilon])
-   cylinder(d=st_screw_d,h=2*hf+epsilon,$fn=fnd*st_screw_d);
+   cylinder(d=st_screw_d+st_screw_d_tolerance,h=2*hf+epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance));
   }
  }
 
--
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