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Unread 09-03-2011, 23:19
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Travis Hoffman Travis Hoffman is offline
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FRC #0048 (Delphi E.L.I.T.E.)
Team Role: Engineer
 
Join Date: Sep 2001
Rookie Year: 2001
Location: Warren, Ohio USA
Posts: 4,047
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Re: Help Requested - "Fatal Task-Level Kernel Exception"

Quote:
Originally Posted by Matt Krass View Post
When you swapped out the Jaguar for the Victor, did you change the code? The Jaguar PWMs update faster and might be causing the Victor to trip over itself trying to keep up.
Sorry I didn't respond sooner to you guys - I was very busy all day prepping for Pittsburgh.

Yes, I changed the code when I switched the controller. It turns out the problem was tracked to a bad 10 AWG zip cord power cable running to the controller.

I am not a fan of large-gauge zip cord (red/black wires joined together into a single cord). It is far too easy to tear the insulation during lead separation and expose the copper in those things. There was a small tear in both of them that was causing an intermittent short. I swapped out the cable to independent red and black wires, and the problem disappeared. I enjoyed hacking the zip cord into little pieces before disposing of it!

For smaller gauges like 18, zip cord is great - the two wires readily separate. For large gauges, I'm going with indivdual wires from now on.

Thanks to all who suggested ideas.
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Travis Hoffman, Enginerd, FRC Team 48 Delphi E.L.I.T.E.
Encouraging Learning in Technology and Engineering - www.delphielite.com
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