another: minor adjustment to spring tensioner

1 files changed, 3 insertions, 2 deletions

diff --git a/another.scad b/another.scad
index cd084ce..fe30fce 100644
--- a/another.scad
+++ b/another.scad
@@ -274,107 +274,108 @@ module the_extruder(
     translate([-r-1,0,-1]) cube(size=[2*r+2,r+1,ls_h+2]);
    }
    
    rotate([0,0,-45])
    translate([0,0,ls_z-ls_h/2])
    cube(size=[gearbox_d,gearbox_d,lever_thickness+lever_v_clearance]);
    translate([0,0,ls_z-ls_h/2]) {
     translate([mount_screwhead_d/2,0,0])
     mirror([0,1,0])
     cube(size=[gearbox_d,gearbox_d/2+1,lever_thickness+lever_v_clearance]);
    }
    //translate([-mount_d/2,-longwing,filament_elevation])
    if(!tensioner) translate([mount_d/2,-longwing,filament_elevation])
    rotate([0,-90,0]) difference() {
     cylinder(d=spring_d+spring_d_clearance,h=spring_lc+spring_dl,$fn=PI*spring_d);
     translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=PI*spring_d);
    }
    //sphere(d=spring_d*3/4,$fn=PI*spring_d);
    * difference() {
     // spring support
     translate([0,-longwing,filament_elevation])
     sphere(d=spring_d*3/4,$fn=PI*spring_d);
    }
     
   }//difference
 
   if(supports) intersection() {
    difference() {
     translate([0,0,ls_z-ls_h/2-epsilon])
     cylinder(d=gearbox_d,h=ls_h+2*epsilon,$fn=2*PI*gearbox_d);
     cylinder(d=pulley_d+pulley_clearance,h=body_h+1,$fn=2*PI*(pulley_d+pulley_clearance));
    }
    // supports
    // TODO: hardcoded stuff below…
    if(false) { // parallel
     for(y=[-gearbox_d:4:gearbox_d])
      translate([0,y-extrusion_width/2,0])
      cube(size=[gearbox_d,extrusion_width,body_h]);
    }else{ // radial
     for(zr=[-65:(65+50)/7:50])
      rotate([0,0,zr]) translate([0,-extrusion_width/2,0])
      cube(size=[gearbox_d,extrusion_width,body_h]);
    }
   }
 
  }//body module
 
  module springpad() {
-  smalld=st_screw_d+extrusion_width;
+  smalld=st_screw_d+2*extrusion_width;
   bigd = spring_d+spring_d_clearance/2;
   hf = (bigd-smalld)/2;
   translate([-gearbox_d/2+st_shell+st_nut_h+st_shell+smalld,-longwing,filament_elevation])
   rotate([0,90,0]) difference() {
    union() {
     cylinder(d1=smalld,d2=bigd,h=hf,$fn=bigd*PI*2);
     translate([0,0,hf-epsilon])
     cylinder(d=bigd,h=hf*2,$fn=bigd*PI*2);
    }
-   cylinder(d=st_screw_d,h=2*hf,$fn=st_screw_d*PI*2);
+   translate([0,0,-epsilon])
+   cylinder(d=st_screw_d,h=2*hf+epsilon,$fn=st_screw_d*PI*2);
   }
  }
 
  module knob() {
   ch = knob_indent_d/2;
   translate([0,0,body_h+epsilon]) {
    mirror([0,0,1]) translate([0,0,-epsilon]) {
     difference() {
      cylinder(d=pulley_d,h=knob_bore_l,$fn=pulley_d*PI*2);
      translate([0,0,-1]) difference() {
       cylinder(d=bore_d+knob_bore_d_tolerance,h=knob_bore_l+2);
       translate([-bore_d/2-1,bore_dd-bore_d/2+knob_bore_d_tolerance/2,-1])
       cube([bore_d+2,bore_d/2,knob_bore_l+4]);
      }
     }
    }
    difference() {
     union() {
      cylinder(d1=gearbox_d-2*ch,d2=gearbox_d,h=ch+epsilon,$fn=PI*gearbox_d*2);
      translate([0,0,ch])
      cylinder(d=gearbox_d,h=knob_h-2*ch+epsilon,$fn=PI*gearbox_d*2);
      translate([0,0,knob_h-ch])
      cylinder(d1=gearbox_d,d2=gearbox_d-2*ch,h=ch,$fn=PI*gearbox_d*2);
     }
     for(a=[0:360/knob_indents:359]) rotate([0,0,a])
      translate([0,gearbox_d/2,-1])
      cylinder(d=knob_indent_d,h=knob_h+2,$fn=knob_indent_d*PI*2);
    }
   }
  }//knob module
 
  mirrorleft()
  if(what=="lever") color("green",0.7) lever();
  else if(what=="body") color("yellow",0.7) body();
  else if(what=="knob") color("red",0.7) knob();
  else if(what=="springpad") color("blue",0.7) springpad();
  else if(what=="both") {
   color("green",0.7) lever();
   color("yellow",0.7) body();
  }else{
   color("green",0.7) lever();
   color("yellow",0.7) body();
   color("red",0.7) knob();
   color("blue",0.7) springpad();
  }
 }
 
 the_extruder(what="both",left=false);