FP ok to stall?

[MJ Miller]

We're using 2 FP (one at each end of the roller) running at 30% power. In another thread I read running FP's above about 50% under load will lead to the motor failing. I didn't verify the claim. But our trick has been to drive the roller with rubber o-rings. At first, we used special pulleys machined to press onto the FP shaft. The motors didn't stall, but the roller would resulting in burned and broken o-rings. Then, by accident we noticed during additional testing that one o-ring had slipped off the pulley and was running just on the motor shaft. We noticed that seemed to work by allowing the o-ring to slip on the shaft when the roller stalled. We made it through the entire Bayou regional last week, including elimination rounds, without losing an o-ring! Give it a try.

MJ
Mentor, Team 1421