adjust spring compression scale

1 files changed, 3 insertions, 2 deletions

diff --git a/another.scad b/another.scad
index 4842e1b..c24d13a 100644
--- a/another.scad
+++ b/another.scad
@@ -339,104 +339,105 @@ module the_extruder(
    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
    
    // spring tensioner
    translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) {
     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, $fn=fnd*bigd);
       translate([0,-(st_split_w+st_split_w_tolerance)/2,0]) hull() {
        cube(size=[body_h-ls_z-st_w+st_split_w_tolerance,st_split_w+st_split_w_tolerance,fsw+1]);
        translate([0,0,st_w+1])
        cube(size=[body_h-ls_z+1,st_split_w+st_split_w_tolerance,fsw+1]);
       }
      }//translate
      translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon])
      cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd);
     }//mirror
    }//translate
 
    // label
    body_label();
    // scale
    body_scale();
 
   }//difference
 
  }//body module
  module body_scale() {
   scale_thickness = 2*layer_height;
   nscales = 5;
   x1 = -gearbox_d/2+fsw-st_h+st_w+st_bump*2-st_bump_tip/2;
   x0 = -gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+st_split_w+st_split_w_tolerance+st_bump_tip/2;
-  w0 = st_split_w+st_split_w_tolerance+2*(extrusion_width+2*extrusion_width);
+  w00 = st_split_w+2*(st_bump-st_bump_tip);
+  w0 = w00+2*2*extrusion_width;
   w1 = 2*(longwing-gearbox_d/2-extrusion_width);
   translate([0,-longwing,body_h-scale_thickness])
   difference() {
    for(x=[x0:(x1-x0)/(nscales-1):x1]) let(w=w0+(w1-w0)*(x-x0)/(x1-x0))
     translate([x-st_bump_tip/2,-w/2,0])
     cube(size=[st_bump_tip,w,scale_thickness+epsilon]);
-   let(w=st_split_w+st_split_w_tolerance+extrusion_width)
+   let(w=w00)
    translate([-gearbox_d/2,-w/2,-1])
    cube(size=[fsw,w,scale_thickness+2]);
   }
  }
  module body_label() {
   if(body_label) {
    label=body_label;
    label_thickness=body_label_thickness;
    label_len = len(label);
    labelspace = [gearbox_d/2-mount_screwhead_d/2-min_xy_shell,longwing-(mount_screwhead_d-st_split_w-st_split_w_tolerance)/2-2*min_xy_shell];
    translate([0,0,body_h-label_thickness])
    linear_extrude(height=label_thickness+epsilon,convexity=64)
    translate([-mount_screwhead_d/2-min_xy_shell-labelspace.x/2,-longwing+(st_split_w+st_split_w_tolerance)/2+min_xy_shell+labelspace.y/2])
    mirror([left?0:1,0])
    text(text=label,size=labelspace.x/label_len,halign="center",valign="center",font="Arial Black");
   }else sphere(d=epsilon); // to avoid makefile breakage
  }
 
  st_bump = 4*extrusion_width;
  st_bump_tip = 2*extrusion_width;
  st_smalld = st_screw_d+st_screw_d_tolerance+min_xy_shell;
  st_bigd = spring_d+spring_d_clearance/2;
  st_hf = (st_bigd-st_smalld)/2;
  st_h = max(st_hf*3,fsw-st_screw_l+st_hf);
  st_w = sp_ch;
  module springpad() {
   smalld=st_smalld;
   bigd = st_bigd;
   hf = st_hf;
   h = st_h;
   translate([-gearbox_d/2+fsw-h,-longwing,filament_elevation])
   rotate([0,90,0]) difference() {
    union() {
     cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd);
     translate([0,0,hf-epsilon])
     cylinder(d=bigd,h=h-hf,$fn=fnd*bigd);
     translate([0,0,h])
     sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4);
     l = body_h-ls_z;
     w = st_w;
     translate([0,-st_split_w/2,0]) mirror([1,0,0]) {
      hull()  {
       translate([0,0,w+st_bump])
       cube(size=[l+st_bump,st_split_w,w]);
       cube(size=[l-w,st_split_w,2*w]);
      }
      translate([l,0,w+st_bump]) hull() {
       cube(size=[st_split_w,st_split_w,st_bump]);