[moffkalast]

Hmm yeah one could probably replace those with regular serial servos for a tenth the price, but this sort of actuator does require both a lot of torque and an extremely fast response rate, which tends to equal expensive oversized FOC controlled BLDC motors with a low gear reduction.

[hadjian]

All the prices for DIY robots seem to be defined by the servo motor prices.

I will start by building the Koch robot arm with servos harvested from my kids toys. Let’s see how good that works.