customizable servo arm

# customizable servo arm

A customizable OpenSCAD model to generate a servo arm that exactly fits your needs.

It is based on the work by [Paul Barrett](https://github.com/hugokernel/OpenSCAD_ServoArms) and [Charles Rincheval](https://www.thingiverse.com/thing:630862). I added the splines for SG90, SG90TP and HITEC A1 servos, and reworked the layout of arm and support.

It currently supports these servo splines:

* Futaba 3F (25 teeth)
* Futaba 2F (21 teeth)
* Futaba 1F (15 teeth)
* HITEC A1 aka. A15T (15 teeth)
* SG90 (21 teeth)
* SG90TP (21 teeth)

The Futaba 3F spline is the most common spline for standard servos. It fits a large variety of servos and brands.

For the 9g micro servos called SG90, I learned that there exist at least two different sizes of the servo head. A Tower Pro SG90 servo has a smaller diameter of the servo head then all the other NoName SG90 servos I own. So I designed splines for both sizes, called SG90 for the bigger NoName (4.9mm diameter) and SG90TP for the