Quote:
Originally Posted by EricVanWyk
My guess is a chassis isolation fault is affecting one of the encoder channels. Something down stream of an actuator controller (Jaguar, Victor, Talon, Spike, Solenoid Breakout, etc) is asserting a voltage on the chassis (hopefully the battery return voltage).
The value "chatter" tells us two things: The software is fine, since things are moving, and one pin is stuck in one position (high or low).
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I unplugged everything (4 talon + compressor relay PWMs) from the DSC except the encoder and removed the circuit breakers for everything except the cRio and DSC. Same problem.
I then tried different combinations of pins for channels A/B and found that pins 2, 3, 4 work when the DS is disabled but not when enabled. If I have one good pin and one bad, I get the "chatter" as you described, two bad pins = nothing, two good pins it works fine disabled and enabled.