5/6 Axis version of Grbl, the open source, embedded, high performance g-code-parser and CNC milling controller written in optimized C that will run on an Arduino Mega2560 ...

An Uno, a GRBL shield, and some stepper drivers let a little G-code control the two axes of the jig. The video below shows it in action; things do get a bit wobbly as the cut progresses ...