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Is this using any feedback mechanism on the position, or is it just feed-forward?

Anyway, I want a machine like this that can paint.

There's a little bit of feedback: Each belt has a rotary encoder to track position, and the motors apply positive torque rather than positive position. This is in contrast to how stepper motors work on a 3d printer, for example.

> Anyway, I want a machine like this that can paint.

https://youtu.be/osUTMnDFV30?si=wLUXKoyTDgfZELKu

Heh, nice, from the guy who also made a wacky hair cutting robot.

I think his approach can be improved if indeed he replaced the guiding rails by a system with corner-points only. That would make it more user-friendly.

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