Unexplained loss of motor power while valves work.

[tr6scott]

http://www.youtube.com/watch?v=Gu35qtup3R4

MSC elimination match.

At the end of the match, our bot, 2137 lost ability to drive our drive motors on our way to the tower to deploy the minibot.

As can be seen in video, we can still control the valves and move the arm, although it appears sluggish, which also leads me to believe that we may have lost control to the spike that powers the compressor. But being that we are controlling the valves, the problem should not be communications to the cRIO and the field, correct?

Drives are PWM controlled Jaguars, 3 gray and 1 black. 2 CIM on left, 2 CIM on right, tank drive configuration.

My thoughts were that the digital side card lost comms or had some failure. When we powered back on in the pits, everything worked, we reviewed the connections to the digital side card, both power and 37pin cable. We really never found a reason for the failure. Bot was fine for the last four matches.

Any ideas on what should be checked or replaced at Nationals?