We have a PG71 motor/transmission powering our shooter lift; however it back drives. If we use a PID loop to keep it stable could it burn out the motor as it is brushed?
The fact that it brushed vs brushless has little impact on whether it burns up theoretically. Practically, in FRC, it does have some impact since many FRC brushless motors are larger and produce more torque at a given voltage then the 775 motor in the PG71. They also have built in current limiting to protect against failures. But a NEO 550 is pretty easy to burn out.
At what voltage does the arm not backdrive? You can compare that voltage to the locked rotor tests here to see whether it’s safe to have a PID commanding that voltage for long periods of time. https://motors.vex.com/other-motors/am-775
Thanks for the reply Joe.
the arm backdrives at all positions. I think we are going to have to use torsion or cf springs to try to achieve some kind of balance.
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