spring compression scale

2 files changed, 35 insertions, 6 deletions

diff --git a/Makefile b/Makefile
index 5753a68..b9d2b4c 100644
--- a/Makefile
+++ b/Makefile
@@ -16,3 +16,3 @@ clean:
 stl-another-%:
-        $(MAKE) another-$*-{body,body-label,lever,knob,knob-label,springpad}.stl
+        $(MAKE) another-$*-{body,body-label,body-scale,lever,knob,knob-label,springpad}.stl
 
@@ -22,2 +22,4 @@ another-%-body-label.stl: another-%.scad another.scad
         $(OPENSCAD_BIN) $(OPENSCAD_FLAGS) -D 'what="body.label"' -o "$@" "$<"
+another-%-body-scale.stl: another-%.scad another.scad
+        $(OPENSCAD_BIN) $(OPENSCAD_FLAGS) -D 'what="body.scale"' -o "$@" "$<"
 another-%-lever.stl: another-%.scad another.scad
diff --git a/another.scad b/another.scad
index fd73a61..83a4e43 100644
--- a/another.scad
+++ b/another.scad
@@ -375,2 +375,4 @@ module the_extruder(
    body_label();
+   // scale
+   body_scale();
 
@@ -379,2 +381,19 @@ module the_extruder(
  }//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);
+  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)
+   translate([-gearbox_d/2,-w/2,-1])
+   cube(size=[fsw,w,scale_thickness+2]);
+  }
+ }
  module body_label() {
@@ -395,7 +414,12 @@ module the_extruder(
  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_screw_d+st_screw_d_tolerance+min_xy_shell;
-  bigd = spring_d+spring_d_clearance/2;
-  hf = (bigd-smalld)/2;
-  h = max(hf*3,fsw-st_screw_l+hf);
+  smalld=st_smalld;
+  bigd = st_bigd;
+  hf = st_hf;
+  h = st_h;
   translate([-gearbox_d/2+fsw-h,-longwing,filament_elevation])
@@ -409,3 +433,3 @@ module the_extruder(
     l = body_h-ls_z;
-    w = sp_ch;
+    w = st_w;
     translate([0,-st_split_w/2,0]) mirror([1,0,0]) {
@@ -500,2 +524,3 @@ module the_extruder(
  else if(what=="body.label") color("brown",0.7) body_label();
+ else if(what=="body.scale") color("brown",0.7) body_scale();
  else if(what=="knob") color("red",0.7) knob();
@@ -507,2 +532,3 @@ module the_extruder(
   color("brown",0.7) body_label();
+  color("brown",0.7) body_scale();
  }else{
@@ -511,2 +537,3 @@ module the_extruder(
   color("brown",0.7) body_label();
+  color("brown",0.7) body_scale();
   color("red",0.7) knob();