3D printed button option

BUTTON/popn_keycap.scad

@@ -0,0 +1,49 @@
+gap_w = 1.19; // 1.17 +/-0.02
+gap_h = 4.15; // 4.1 +0.05
+stem_l = 4.8;
+
+
+difference() {
+    translate([0,0,3]) difference() {
+        bean([28,28,10]); 
+        translate([0,0,-1.5]) bean([25,25,10]);
+    }
+    translate([-50,-50,-100]) cube([100,100,100]);    
+}
+
+stem();
+
+//color("green", 0.3) translate([0,0,0]) cylinder(d=28,h=8);
+//color("red", 0.6) translate([0,0,0]) cylinder(d=8,h=3);
+//color("blue", 0.6) translate([0,0,3]) cylinder(d=9,h=stem_l);
+
+module bean(x) {
+    resize(x) minkowski() {
+        difference() {
+            translate([0,0,-1.8]) resize([30,30,5]) sphere(d=50,$fn=96);
+            translate([-50,-50,-100]) cube([100,100,100]);
+        }
+        sphere(d=7,$fn=64);
+    }
+}
+
+module stem() {
+    color("cyan") translate([0,0,8-stem_l-1]) union() {
+        difference() {
+            union() {
+                cylinder(d=5.5,h=stem_l+1,$fn=64);
+                hull() {
+                    translate([0,0,stem_l-0.5]) cylinder(d=5.5,h=0.1,$fn=64);
+                    translate([0,0,stem_l+1]) cylinder(d=10,h=0.1,$fn=64);
+                }
+            }
+            translate([0,0,-1]) cube([gap_h,gap_w,20], center=true);
+            translate([0,0,-1]) cube([gap_w,gap_h,20], center=true);
+            translate([0,0,-1]) cube([gap_w+0.3*2,gap_w+0.3*2,20], center=true);
+        }
+        translate([-gap_w/2-0.3,-gap_w/2-0.3, 0]) cylinder(d=0.6,h=4.5,$fn=24);
+        translate([gap_w/2+0.3,-gap_w/2-0.3, 0]) cylinder(d=0.6,h=4.5,$fn=24);
+        translate([-gap_w/2-0.3,gap_w/2+0.3, 0]) cylinder(d=0.6,h=4.5,$fn=24);
+        translate([gap_w/2+0.3,gap_w/2+0.3, 0]) cylinder(d=0.6,h=4.5,$fn=24);
+    }
+}

README.md

@@ -80,30 +80,36 @@ Thanks to:
   <img src="doc/assembled_back.jpg" width="50%">
 
  ### Step 5 - Keycaps
- * There're many choices.
-   * Homemade bottle cover keycaps  
-     <img src="doc/keycap_bottle_cover.jpg" width="50%">
-   * Homemade coat buttons keycaps  
-     <img src="doc/keycap_coat_button.jpg" width="50%">
-   * DSA color keycaps  
-     <img src="doc/keycap_dsa.jpg" width="50%">
-   * DSA transparent keycaps  
-     <img src="doc/keycap_dsa_2.jpg" width="50%">
-   * MA color keycaps  
-     <img src="doc/keycap_ma.jpg" width="50%">
-   * XDA 1.5U color keycaps  
-     <img src="doc/keycap_xda15x.jpg" width="50%">
- * About the homemade process.
-   * I bought these inexpensive 3gram/5gram distribution bottles just to get the covers (28-30mm diameter).  
-     <img src="doc/homemade_bottles.jpg" width="50%">
-   * Cut the shaft/socket out of regular transparent keycaps.  
-     <img src="doc/homemade_get_shaft.jpg" width="50%">
-   * Drill some holes on them so later we can apply UV resin better.  
-     <img src="doc/homemade_drill_holes.jpg" width="50%">
-   * Apply UV resin, glue the socket and the cover together.  
-     <img src="doc/homemade_uv_resin.jpg" width="50%">
-     <img src="doc/homemade_glue_together.jpg" width="50%">
-   * Don't forget alignment.  
-     <img src="doc/homemade_alignment.jpg" width="50%">
-   * After cured by UV light, they look like this:  
-     <img src="doc/homemade_cured.jpg" width="50%">  
+ * If you have resin printer, you can make them by yourself.
+   * Make half-transparent resin by mixing translucent and white resin (5:1) as the base resin.
+   * Mix some drops of UV resin pigment, you can make all Pop'n Music button colors.  
+     <img src="doc/color_pigment.jpg" width="50%">
+   * 3D file is **/PRODUCTION/popn_keycap.stl** or if you're using Chitubox - **/PRODUCTION/popn_6keys.chitubox**. Orientation and support should be like this to get perfect button surface.  
+    <img src="doc/button_resin_support.png" width="50%">
+* There're many other choices.
+  * Homemade bottle cover keycaps  
+    <img src="doc/keycap_bottle_cover.jpg" width="50%">
+  * Homemade coat buttons keycaps  
+    <img src="doc/keycap_coat_button.jpg" width="50%">
+  * DSA color keycaps  
+    <img src="doc/keycap_dsa.jpg" width="50%">
+  * DSA transparent keycaps  
+    <img src="doc/keycap_dsa_2.jpg" width="50%">
+  * MA color keycaps  
+    <img src="doc/keycap_ma.jpg" width="50%">
+  * XDA 1.5U color keycaps  
+    <img src="doc/keycap_xda15x.jpg" width="50%">
+  * About the homemade process.
+  * I bought these inexpensive 3gram/5gram distribution bottles just to get the covers (28-30mm diameter).  
+    <img src="doc/homemade_bottles.jpg" width="50%">
+  * Cut the shaft/socket out of regular transparent keycaps.  
+    <img src="doc/homemade_get_shaft.jpg" width="50%">
+  * Drill some holes on them so later we can apply UV resin better.  
+    <img src="doc/homemade_drill_holes.jpg" width="50%">
+  * Apply UV resin, glue the socket and the cover together.  
+    <img src="doc/homemade_uv_resin.jpg" width="50%">
+    <img src="doc/homemade_glue_together.jpg" width="50%">
+  * Don't forget alignment.  
+    <img src="doc/homemade_alignment.jpg" width="50%">
+  * After cured by UV light, they look like this:  
+    <img src="doc/homemade_cured.jpg" width="50%">