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Unread 24-03-2015, 08:17
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tr6scott tr6scott is offline
Um, I smell Motor!
AKA: Scott McBride
FRC #2137 (TORC)
Team Role: Mentor
 
Join Date: Dec 2007
Rookie Year: 2005
Location: Oxford, MI
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Re: How to determine root cause of robot dropping from Teleop to Disabled during matc

Tom,

Many gremlins, and anomalies with that field that weekend. On the webcast they said it was a complete "power loss" on your side of the field and that was why the replay was granted.

One of the things that concerns me, is what is the determining factors between the decision to replay your match, and not replay our match. As that decision, could have been a deciding factor on who moved on. Another glitch in one of our other matches would have knocked us out for sure. As it happened, our elevator self destructed due to being disabled and re-enabled too, and that almost knocked us out with a single event.

From our logs, I understand what our robot did, and there are code fixes we can make so that we don't react the way we did when being disabled, and re-enabled. It was kind of a perfect storm scenario, where the elevator was being jogged manually when we lost comms, and when re-established, the pid was reset and sending it to lowest position, those events made us try to rip the elevator when we jammed the container in our arm.. This failure mode was not something I have seen in the past, but I now know to test for this scenario.
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