add holder for new laser (laser 301)

3d_models/laser_holder_301.scad

@@ -0,0 +1,43 @@
+
+// Arc Module for OpenSCAD by chickenchuck040 is licensed under the Creative Commons - Attribution license.
+// https://www.thingiverse.com/thing:1092611/#files
+
+module arc(radius, thick, angle){
+        intersection(){
+                union(){
+                        rights = floor(angle/90);
+                        remain = angle-rights*90;
+                        if(angle > 90){
+                                for(i = [0:rights-1]){
+                                        rotate(i*90-(rights-1)*90/2){
+                                                polygon([[0, 0], [radius+thick, (radius+thick)*tan(90/2)], [radius+thick, -(radius+thick)*tan(90/2)]]);
+                                        }
+                                }
+                                rotate(-(rights)*90/2)
+                                        polygon([[0, 0], [radius+thick, 0], [radius+thick, -(radius+thick)*tan(remain/2)]]);
+                                rotate((rights)*90/2)
+                                        polygon([[0, 0], [radius+thick, (radius+thick)*tan(remain/2)], [radius+thick, 0]]);
+                        }else{
+                                polygon([[0, 0], [radius+thick, (radius+thick)*tan(angle/2)], [radius+thick, -(radius+thick)*tan(angle/2)]]);
+                        }
+                }
+                difference(){
+                        circle(radius+thick);
+                        circle(radius);
+                }
+        }
+}
+
+
+module holder(rad) {
+    union() {
+        rotate(-45) arc(rad, 3, 240);
+        difference() {
+            polygon(points=[[0,-(rad+3)],[(rad+3+5),-(rad+3)],[rad+3+5,rad+3+15],[rad+3,rad+3+15] ]);
+            circle(rad);
+        }
+    }
+}
+
+linear_extrude(height=20)
+holder(23/2);