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
@@ -81,6 +81,9 @@ module the_extruder(
  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;
@@ -230,7 +233,7 @@ module the_extruder(
    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() {