View Single Post
  #9   Spotlight this post!  
Unread 17-02-2011, 14:35
jtdowney jtdowney is offline
Boiler Up
AKA: John Downey
FRC #4302 (Robophins)
Team Role: Mentor
 
Join Date: Sep 2006
Rookie Year: 2006
Location: Chicago
Posts: 300
jtdowney has a brilliant futurejtdowney has a brilliant futurejtdowney has a brilliant futurejtdowney has a brilliant futurejtdowney has a brilliant futurejtdowney has a brilliant futurejtdowney has a brilliant futurejtdowney has a brilliant futurejtdowney has a brilliant futurejtdowney has a brilliant futurejtdowney has a brilliant future
Re: E-Stop Lag... now part of our arm is broken

Quote:
Originally Posted by Greg McKaskle View Post
4. Examine the digital breakout. In the very rare cases I've heard of where a robot moved even when disabled, it was due to a fused digital breakout board that didn't disable digital lines properly. I don't remember the exact issue, but it was a damaged board. That doesn't make sense with a PWM signal, but verify the board looks good anyway.
We had something similar happen to us at a fall off-season event. The spike relays (nothing else) were firing while disabled and the RSL was never turning on. Our theory at the time was that the signal was getting crossed inside the digital side car. Replacing the side car got us running again but it was very odd and unsafe that our spikes started turning on randomly.
__________________
John Downey
Lead Robot Inspector - Purdue IndianaFIRST District
Whitney Young Magnet High School/Robophins (FRC 4302) - Mentor (2013-current)
Midwest Regional Planning Committee - Member (2012-current)
Boilermaker Regional Planning Committee - Member (2011-2014)
Robot Inspector (2008-current)
Purdue FIRST Programs - Staff Advisor (2008-2011)
Lafayette-Jefferson High School/Precision Guessworks (FRC 1646) - Mentor (2006-2011)
Reply With Quote