Quote:
Originally Posted by Russ Beavis
What are you using for motor drives? Does it happen for every motor driven via the DSC? Does this happen somewhat consistently?
Does this happen when the PWM cables are disconnected from the DSC? If so, maybe your motor drive has a fault such that it's spontaneously energizing its H-bridge every once in a while (not unlike the reported Jaguar failures).
Russ
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For motor drives (I'm assuming you are speaking of the down stream speed controllers) we are using a mix of Jaguars and Victors. The problem is apparent on all ports. We have 7 motor controllers on the robot now, so we have only tested between 0-7 plugged in, but I assume it would be the same with more.
The random bursts have happened on a variety of motors. Sometimes only one will drive, sometimes they will all drive. I have not seen any kind of pattern to when these events occur, they just happen after a long period of the robot being powered on.
We have got our hands on a fresh DSC. We have double checked everything else in the system for isolation, and should be testing the DSC tonight. I will let you know the results.
Also, can anyone elaborate on what the "FPGA and COMMS OK" indicator on the FRC Diagnostic Window is representing?