Dead servo again.

So I have maybe twenty hours total run time on the Axidraw before the servo died.

To be clear, that’s twenty hours of servo run time.

Maybe ten hours of a single continuous plot.

Is it possible that the belt is building up static charge when running continuously?

I ask because it has quit twice when I touched the usb cable after the plotter had been running for many hours.

(Touched, not wiggled.)

Is twenty hours of run time anywhere near the life cycle for these servos?

If not I’ve got something else going on.

I’m inclined to try grounding the Axidraw to the Raspberry Pi to see if that makes any improvement.