Thread: Main breaker tripping, dead CIM
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Unread 06-04-2014, 17:24
NotInControl NotInControl is offline
Controls Engineer
AKA: Kevin
FRC #2168 (Aluminum Falcons)
Team Role: Engineer
  
Join Date: Oct 2011
Rookie Year: 2004
Location: Groton, CT
Posts: 261
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Re: Main breaker tripping, dead CIM
Quote:
Originally Posted by Ryan Dognaux View Post
You could try implementing a voltage ramp in software. We did this in-between Central Illinois & St. Louis and never had another issue.

We did some testing on our practice drive at our school and found we were able to force the robot's radio or CRIO to reboot using 6 full sized CIMs geared similarly to what you described. Once we implemented the voltage ramp the problem was solved and we couldn't re-create the symptoms.
+1 for voltage ramp. Doing this will lower the probability of all of your motors drawing peak current. We too do this on all of our 6-cim robots.

What language do you use? I am sure many teams on here can provide an example for the implementation in your programming language.

Quote:
Originally Posted by Pat Fairbank View Post
Whenever we trip a main breaker in competition (twice so far this year) it gets thrown into the nearest trash can and a new one goes on the robot. As Marcus said, between matches with tight turnaround we cool it down with compressed air.
I know im side tracking here, but I am curious, do you know what was causing you to trip the main breaker?
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Controls Engineer, Team 2168 - The Aluminum Falcons
[2016 Season] - World Championship Controls Award, District Controls Award, 3rd BlueBanner
-World Championship- #45 seed in Quals, World Championship Innovation in Controls Award - Curie
-NE Championship- #26 seed in Quals, winner(195,125,2168)
[2015 Season] - NE Championship Controls Award, 2nd Blue Banner
-NE Championship- #26 seed in Quals, NE Championship Innovation in Controls Award
-MA District Event- #17 seed in Quals, Winner(2168,3718,3146)
[2014 Season] - NE Championship Controls Award & Semi-finalists, District Controls Award, Creativity Award, & Finalists
-NE Championship- #36 seed in Quals, SemiFinalist(228,2168,3525), NE Championship Innovation in Controls Award
-RI District Event- #7 seed in Quals, Finalist(1519,2168,5163), Innovation in Controls Award
-Groton District Event- #9 seed in Quals, QuarterFinalist(2168, 125, 5112), Creativity Award
[2013 Season] - WPI Regional Winner - 1st Blue Banner