don't support configuration without tensioning screw

1 files changed, 19 insertions, 30 deletions

diff --git a/another.scad b/another.scad
index 9ff7f6a..e6d9ca3 100644
--- a/another.scad
+++ b/another.scad
@@ -63,25 +63,24 @@ module the_extruder(
  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,
  bridges = true,
- tensioner = true,
  debug = false
 ) {
  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; // the diameter of lever thingie
  longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+min_xy_shell;
  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;
@@ -339,54 +338,44 @@ module the_extruder(
    a0 = -135 + ( (a0_>0) ? a0_ : 180+a0_ );
    a1 = atan((longwing-lever_thickness/2)/(gearbox_d/2));
    translate([0,0,ls_z]) difference() {
     rotate([0,0,-180+a0])
     rotate_extrude(angle=a1-a0)
     translate([0,-ls_h/2])
     square([sqrt(pow(gearbox_d/2,2)+pow(longwing-lever_thickness/2,2))+1,
            ls_h]);
     translate([-mount_d/2,0,0])
     cylinder(d=gearbox_d-mount_d,h=ls_h+2,center=true,$fn=fnd*(gearbox_d-mount_d));
    }//difference translate
    
-   //translate([-mount_d/2,-longwing,filament_elevation])
-   if(!tensioner) /* XXX: this seems to be bullshit, but it's so old, that it's historical bullshit */
-   translate([mount_d/2,-longwing,filament_elevation])
-   rotate([0,-90,0]) difference() {
-    cylinder(d=spring_d+spring_d_clearance,h=spring_lc+spring_dl,$fn=fnd*(spring_d+spring_d_clearance));
-    translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4);
-   }
-
    // spring tensioner
    translate([-gearbox_d/2,-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, $fn=fnd*bigd);
-       translate([0,-(st_thinshell+st_split_w_tolerance)/2,0])
-       cube(size=[body_h-ls_z+1,st_thinshell+st_split_w_tolerance,fsw+1]);
-      }
-      translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon])
-      cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd);
-     }
-    }
-   }
+    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, $fn=fnd*bigd);
+      translate([0,-(st_thinshell+st_split_w_tolerance)/2,0])
+      cube(size=[body_h-ls_z+1,st_thinshell+st_split_w_tolerance,fsw+1]);
+     }//translate
+     translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon])
+     cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd);
+    }//mirror
+   }//translate
 
   }//difference
 
  }//body module
 
  module springpad() {
   smalld=st_screw_d+st_screw_d_tolerance+min_xy_shell;
   bigd = spring_d+spring_d_clearance/2;
   hf = (bigd-smalld)/2;
   h = hf*3.5;
   translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation])
   rotate([0,90,0]) difference() {
@@ -433,25 +422,25 @@ module the_extruder(
     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=fnd*knob_indent_d);
    }
   }
  }//knob module
 
  module debug() {
   difference() {
    children();
    if(debug) {
     // spring tensioner debug cutout
-    if(tensioner) // TODO: collapse copypasted transformations
+    // TODO: collapse copypasted transformations
     translate([-gearbox_d/2,0,0])
     translate([0,-longwing,ls_z]) rotate([0,-90,0])
     translate([0,-lever_thickness/2-1,-gearbox_d])
     cube(size=[body_h/2+1,lever_thickness/2+1,gearbox_d+2]);
     // lever axis debug cutout
     translate([mount_d/2,0,-1])
     rotate([0,0,-45])
     cube(size=[gearbox_d-mount_d,gearbox_d-mount_d,body_h+knob_h+2]);
     // idler debug cutout
     translate([0,0,ls_z])
     place_idler()
     rotate([0,0,-45])