From eb49701c13f76640936e7a2a7a138bd92617b147 Mon Sep 17 00:00:00 2001
From: Michael Krelin <hacker@klever.net>
Date: Tue, 21 Aug 2018 18:00:15 +0000
Subject: adjustments to screw mount depth

---
diff --git a/another.scad b/another.scad
index 6afa9ef..6ef7299 100644
--- a/another.scad
+++ b/another.scad
@@ -11,6 +11,7 @@ module the_extruder(
  gearbox_d = 36,
  mount_d = 28,					// the distance between opposite mounting holes
  mounthole_depth = 5,
+ mounthole_min_depth = 3, mounthole_max_depth = 4,
  protrusion_d = 22, protrusion_h = 2.2,		// the dimensions of the protrusion on top of gearbox
  bore_d = 8, bore_l = 17.6,
  bore_dd = 7,
@@ -62,6 +63,8 @@ module the_extruder(
  st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */
  st_screw_d_tolerance=.5,
 
+ min_z_shell = 4*layer_height,                  // the very minimal shell thickness along z-axis.
+
  what="lever",  // lever|body|knob|springpad|*
  left=false,
  vitamins = true,
@@ -80,10 +83,14 @@ module the_extruder(
  ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) );
  spring_dl = idler_travel*longwing/ri;
 
+ mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1;
+ mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1;
  filament_elevation=protrusion_h+pulley_elevation+teeth_elevation;
  ls_z = filament_elevation; // leverspace mid-z
- body_h = max(protrusion_h+bore_l,mount_screw_l-mounthole_depth/2+mount_screwhead_h,ls_z*2);
  ls_h = lever_thickness+lever_v_clearance; // leverspace height
+ mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell);
+ body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2);
+ echo("mount depth",mount_depth);
 
  module mirrorleft() {
   mirror([left?0:1,0,0]) children();
@@ -288,12 +295,12 @@ module the_extruder(
    cylinder(d=protrusion_d+protrusion_tolerance_h,h=protrusion_h+protrusion_tolerance_v+1,$fn=fnd*(protrusion_d+protrusion_tolerance_h));
    // mount screw holes
    for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0]) {
-    translate([0,0,mount_screw_l-mounthole_depth/2-(bridges?layer_height:-epsilon)])
+    translate([0,0,mount_screw_l-mount_depth-(bridges?layer_height:-epsilon)])
     mirror([0,0,1])
     cylinder(d=mount_screw_d+mount_screw_d_tolerance,
-             h=mount_screw_l-mounthole_depth/2+1,
+             h=mount_screw_l-mount_depth+1,
 	     $fn=fnd*(mount_screw_d+mount_screw_d_tolerance));
-    translate([0,0,mount_screw_l-mounthole_depth/2])
+    translate([0,0,mount_screw_l-mount_depth])
     cylinder(d=mount_screwhead_d,h=body_h+1,$fn=fnd*mount_screwhead_d);
    }//for
    // pushfit
--
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