add split tolerance

1 files changed, 9 insertions, 5 deletions

diff --git a/another.scad b/another.scad
index 8d9d22c..b1cbdeb 100644
--- a/another.scad
+++ b/another.scad
@@ -53,24 +53,25 @@ module the_extruder(
  idler_clearance=1,
  pulley_d_clearance=2,
  lever_v_clearance=.7,				// vertical clearance for the lever
  spring_d_clearance=1,
  protrusion_tolerance_h=.5,			// horizontal tolerance for the motor protrusion
  protrusion_tolerance_v=.5,			// vertical tolerance for the motor protrusion
  mount_screw_d_tolerance=.4,
  idler_v_tolerance=.5,
  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=.5,
+ st_split_w_tolerance = .3,
 
  min_z_shell = 4*layer_height,                  // the very minimal shell thickness along z-axis.
  min_xy_shell = 2*extrusion_width,
 
  what="lever",  // lever|body|knob|springpad|*
  left=false,
  vitamins = true,
  supports = false, bridges = true,
  tensioner = true,
  debug = false
 ) {
  fnd = 2*PI; fnr = 2*fnd;
@@ -228,44 +229,47 @@ module the_extruder(
   difference() {
    union() {
     cylinder(d=gearbox_d,h=body_h,$fn=fnd*gearbox_d);
     // finger and spring support
     fsw = gearbox_d-(gearbox_d-mount_d)/2-spring_lc;
     translate([-gearbox_d/2,0,0]) difference() {
      union() {
       hull() {
        translate([0,-longwing,ls_z])
        rotate([0,90,0])
        cylinder(d=lever_thickness,h=fsw,$fn=fnd*lever_thickness);
        hh=body_h-ls_z;
-       translate([0,0,ls_z-lever_thickness/2])
-       mirror([0,1,0]) cube(size=[fsw,longwing-hh+lever_thickness/sqrt(2),hh+lever_thickness/2]);
+       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([0,0,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
     
     // pushfit bracket
     translate([0,0,filament_elevation])
     rotate([0,0,45]) translate([pulley_d/2+filament_offset,0,0])
     rotate([-90,0,0])
     translate([0,0,mount_d/sqrt(2)/2+mount_screw_d-gearbox_d/2/*TODO:*/]) {