Chess robot

**Hello Thingiverse :)**

This project is a compilation of 3 others:
* Gripper by maquina_pensante (http://www.thingiverse.com/thing:1322867)
* Robotic arm by Idegraaf (http://www.thingiverse.com/thing:1241491)
* Chess set by MakeALot (http://www.thingiverse.com/thing:19745)

Inspired by these projects I made a simple plan: to build a robot to allow to play chess with a friend in other location.

First I made a gripper (http://www.thingiverse.com/make:195330).
Then I designed a very simple adapter to mount this gripper for robot arm.

Center of gripper is about 4.5cm further than center of printing head in Idegraaf's project.
So I decided to make second arm 4cm longer too (and replace 320mm belt with 400mm).

Now I print more parts and wait for some hardware delivery.

**2016-02-15 - a little bit of math:**

First please see attached picture.

A and B are the lengths of robot arms.
X and Y are coordinates of destination point.

Calculations:
* C = SQRT (X^2 + Y