Added TowerPro SG90 Servo

servos.scad

@@ -9,6 +9,50 @@
 
 use <triangles.scad>
 
+/**
+ * TowerPro SG90 servo
+ *
+ * @param vector position The position vector
+ * @param vector rotation The rotation vector
+ * @param boolean screws If defined then "screws" will be added and when the module is differenced() from something if will have holes for the screws
+ * @param boolean cables If defined then "cables" output will be added and when the module is differenced() from something if will have holes for the cables output
+ * @param number axle_length If defined this will draw a red indicator for the main axle
+ */
+module towerprosg90(position=undef, rotation=undef, screws = 0, axle_length = 0, cables=0)
+{
+	translate(position) rotate(rotation) {
+        difference(){
+            union()
+            {
+                translate([-5.9,-11.8/2,0]) cube([22.5,11.8,22.7]);
+                translate([0,0,22.7-0.1]){
+                    cylinder(d=11.8,h=4+0.1);
+                    hull(){
+                        translate([8.8-5/2,0,0]) cylinder(d=5,h=4+0.1);
+                        cylinder(d=5,h=4+0.1);
+                    }
+                    translate([0,0,4]) cylinder(d=4.6,h=3.2);
+                }
+                translate([-4.7-5.9,-11.8/2,15.9]) cube([22.5+4.7*2, 11.8, 2.5]); 
+            }
+            //screw holes
+            translate([-2.3-5.9,0,15.9+1.25]) cylinder(d=2,h=5, center=true);
+            translate([-2.3-5.9-2,0,15.9+1.25]) cube([3,1.3,5], center=true);
+            translate([2.3+22.5-5.9,0,15.9+1.25]) cylinder(d=2,h=5, center=true);
+            translate([2.3+22.5-5.9+2,0,15.9+1.25]) cube([3,1.3,5], center=true);
+        }
+        if (axle_length > 0) {
+            color("red", 0.3) translate([0,0,29.9/2]) cylinder(r=1, h=29.9+axle_length, center=true);
+        }
+        if (cables > 0) color("red", 0.3) translate([-12.4,-1.8,4.5]) cube([10,3.6,1.2]);
+        if(screws > 0) color("red", 0.3) {
+            translate([-2.3-5.9,0,15.9+1.25]) cylinder(d=2,h=10, center=true);
+            translate([2.3+22.5-5.9,0,15.9+1.25]) cylinder(d=2,h=10, center=true);
+        }
+    }
+
+}
+
 /**
  * Align DS420 digital servo
  *