Our robot has a spike relay that is wired up to control our claw via window motor. It was working fine, although we realize the window motor was stalling for at least a part of the time. However, yesterday it just randomly stopped.
What we have done for diagnosis so far:
- On the digial sidecar, either the red or the green light next to the PWM cable is turning on, depending on which way we telll it to go.
- On the other end of the PWM cable, when we put the black lead of a multimeter up to the black cable, and the red lead to the white, it gives about 4.5V
- There is 12V in the correct direction on the spike input
- There is a circuit breaker/fuse (we tried them both) on the spike, and the light on the spike is lit
- Even when the window motor is disconnected, we do not get any power on the other side of the spike
- There is a 20A cicuit breaker on the PD board
- Robot is enabled, etc, etc; the Relay LEDs on the digital sidecar are ON.
- I connected one end of a multimeter to common and the other end to each of the outputs (M+ and M-) and didn't get any voltage
I'll probably try putting the spike on different relay ports to see if I get anything.
Thanks for the help!