add equilateral triangle and sr188 bearing

diff --git a/spin-data.scad b/spin-data.scad
index 99ce243388d96f6d6cef9603a7f0b22d0a4b28b8..e5df4e2aa718930ecff0a5909ca9d037a351f7f2 100644 (file)
--- a/spin-data.scad
+++ b/spin-data.scad
@@ -9,7 +9,8 @@ layer_height = 0.35;
 weight = "penny";
 // weight = "608zz";
 
-bearing = "608zz";
+//bearing = "608zz";
+bearing = "sr188";
 // bearing = "625rs";
 
 weight_lip_overhang = 0.3;
@@ -18,6 +19,12 @@ wall = 3;
 penny_thickness = 1.52;
 penny_radius = 19.05 / 2;
 
+sr188_radius = 12.74 / 2; // 0.5 / 2
+sr188_inner_radius = 6.3 / 2; // 0.2470 / 2
+sr188_thickness = 4.8; // 0.1895 inch
+sr188_cover_radius = sr188_radius;
+sr188_cap_footprint_radius = 12 / 2;
+
 _608zz_radius = 22 / 2;
 _608zz_inner_radius = 8.1 / 2;
 _608zz_cover_radius = _608zz_radius;
@@ -37,23 +44,28 @@ weight_thickness = (weight == "penny") ?
 bearing_radius =
   (bearing == "608zz") ? _608zz_radius
   : (bearing == "625rs") ? _625rs_radius
+  : (bearing == "sr188") ? sr188_radius
   : 1/0;
 bearing_window_radius = bearing_radius - bearing_lip_overhang - 1;
 bearing_inner_radius =
   (bearing == "608zz") ? _608zz_inner_radius
   : (bearing == "625rs") ? _625rs_inner_radius
+  : (bearing == "sr188") ? sr188_inner_radius
   : 1/0;
 bearing_cover_radius =
   (bearing == "608zz") ? _608zz_cover_radius
   : (bearing == "625rs") ? _625rs_cover_radius
+  : (bearing == "sr188") ? sr188_cover_radius
   : 1/0;
 bearing_cap_footprint_radius =
   (bearing == "608zz") ? _608zz_cap_footprint_radius
   : (bearing == "625rs" ) ? _625rs_cap_footprint_radius
+  : (bearing == "sr188" ) ? sr188_cap_footprint_radius
   : 1/0;
 bearing_thickness =
   (bearing == "608zz") ? _608zz_thickness
   : (bearing == "625rs") ? _625rs_thickness
+  : (bearing == "sr188") ? sr188_thickness
   : 1/0;
 
 spinner_height = penny_thickness * 5 + 2;
@@ -289,6 +301,13 @@ module spin_slices(weight_radius,
                    r = weight_radius + 0.15,
                    center = true); } } } } }
 
+module equilateral_triangle(radius){
+  polygon([[cos(0) * radius, sin(0) * radius],
+           [cos(120) * radius,
+            sin(120) * radius],
+           [cos(240) * radius,
+            sin(240) * radius]]); }
+
 module spin_cosine(weight_radius,
                    weight_thickness,
                    bearing_radius,
@@ -350,11 +369,7 @@ module spin_cosine(weight_radius,
              center = true);*/
     linear_extrude(height = actual_height + 0.1, center = true) {
       intersection() {
-        polygon([[bearing_radius + 3 * wall, 0],
-                 [cos(120) * (bearing_radius + 3 * wall),
-                  sin(120) * (bearing_radius + 3 * wall)],
-                 [cos(240) * (bearing_radius + 3 * wall),
-                  sin(240) * (bearing_radius + 3 * wall)]]);
+        equilateral_triangle(1.8 * bearing_radius);
         circle(bearing_radius + 0.1); } }
     // bearing cavity
     cylinder(h = bearing_thickness + 0.05,
@@ -369,12 +384,7 @@ module spin_cosine(weight_radius,
             translate([0, 0, (weight_thickness + 0.05) / 2]) {
               linear_extrude(height = wall + 0.1) {
                 intersection(){
-                  polygon([[cos(0) * (weight_radius + 2.5 * wall),
-                            sin(0) * (weight_radius + 2.5 * wall)],
-                           [cos(120) * (weight_radius + 2.5 * wall),
-                            sin(120) * (weight_radius + 2.5 * wall)],
-                           [cos(240) * (weight_radius + 2.5 * wall),
-                            sin(240) * (weight_radius + 2.5 * wall)]]);
+                  equilateral_triangle(1.8 * weight_radius);
                   circle(weight_radius + 0.2); } } } }
           // weight cavity
           cylinder(h = weight_thickness + 0.05,