Hey, I made this! There are Arduino solutions for motion control with dragonframe, but I opted to invest in the DMC16 because it can handle in/out triggers (which I tapped into with the custom control box), it has DMX out lighting control, and it does motion control signals (faster than Arduino can), all in one nice package that I can rack together with the rest of the gear. Might be a little overkill and I'm sure a custom solution could work, but I'm more interested in results than process, so I tend to take the prebuilt approaches when possible.
