[boxcardavin]

I've been following these guys for a while and I really like their approach. In our lab we've done a lot of work to improve control of cheaper BLDC motors (low gearing) to mimic human control and compliance, and these guys are using similar methods to achieve accuracy. Most engineers just decrease tolerances to improve accuracy but using a blunter instrument and making it accurate with good software is an approach that leads to much much cheaper systems and robots. Drones are a good example, quadcopters are inelegant and somewhat inefficient flying machines but their cheap and blunt hardware comes alive with good control theory and software.