give more space for idler to travel

1 files changed, 4 insertions, 1 deletions

diff --git a/another.scad b/another.scad
index 4f70a1a..79cebdd 100644
--- a/another.scad
+++ b/another.scad
@@ -76,16 +76,19 @@ module the_extruder(
 ) {
  fnd = 2*PI; fnr = 2*fnd;
 
  idler_filament_offset = filament_path_d/2; // -filament_offset;
  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;
+ 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;
  h_ = (pulley_d+idler_d)/(2*sqrt(2));
  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
@@ -225,17 +228,17 @@ module the_extruder(
   }//translate
  }//lever module
  
  module body() {
   difference() {
    union() {
     cylinder(d=gearbox_d,h=body_h,$fn=fnd*gearbox_d);
     // finger and spring support
-    fsw = gearbox_d-(gearbox_d-mount_d)/2-spring_lc;
+    fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2);
     translate([-gearbox_d/2,0,0]) difference() {
      union() {
       hull() {
        translate([0,-longwing,ls_z])
        rotate([0,90,0])
        cylinder(d=lever_thickness,h=fsw,$fn=fnd*lever_thickness);
        hh=body_h-ls_z;
        translate([0,0,ls_z])