View Single Post
  #38   Spotlight this post!  
Unread 16-03-2011, 13:13
Mark McLeod's Avatar
Mark McLeod Mark McLeod is offline
Just Itinerant
AKA: Hey dad...Father...MARK
FRC #0358 (Robotic Eagles)
Team Role: Engineer
 
Join Date: Mar 2003
Rookie Year: 2002
Location: Hauppauge, Long Island, NY
Posts: 8,931
Mark McLeod has a reputation beyond reputeMark McLeod has a reputation beyond reputeMark McLeod has a reputation beyond reputeMark McLeod has a reputation beyond reputeMark McLeod has a reputation beyond reputeMark McLeod has a reputation beyond reputeMark McLeod has a reputation beyond reputeMark McLeod has a reputation beyond reputeMark McLeod has a reputation beyond reputeMark McLeod has a reputation beyond reputeMark McLeod has a reputation beyond repute
Re: Robots not under driver control- does it happen- do you determine why?

Quote:
Originally Posted by pfreivald View Post
We're still trying to figure out why we're getting COM drops.

Our wiring is sound (and connections both strain gauged and either hot glued or taped).
Our power appears to be constant.
Our bridge was replaced with another bridge.
Our bridge is up high and visible everywhere but the bottom (it is upside-down) from 360 degrees with very little obstruction from the aluminum frame.
We are not getting errors as we run in autonomous or teleop.

...and yet, a few times at FLR, and a few times during practice, our bridge likes to reboot, killing our robot for about a minute.

Suggestions, anyone?
Just the obvious.

If your radio drops out for more than a minute, before it comes back, then it's not a position problem, it's a power supply problem.
  • Watch the low point of battery voltage drops while the robot is under strain. Consider adding an error message to the Driver Station whenever the battery voltage drops below 6v or so.
  • Verify the radio is on the special power protected PD output, of course. Found way too many on the camera 5v feed or regulat red/black wago connectors.
  • Wiggle the barrel connector while under power in the pits to see if you can force a power outage. That's how we identify poorly fitting connectors (Radio Shack :-) ).
  • Inadvertent contact with the button on the side of the radio.
__________________
"Rationality is our distinguishing characteristic - it's what sets us apart from the beasts." - Aristotle

Last edited by Mark McLeod : 16-03-2011 at 13:22.