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View Poll Results: Do you ever lose control of your robot?
Never- our controls are always 100% with no sluggishness nor dropouts 26 37.14%
we started paying careful attention to radio placement and never had another problem 17 24.29%
Yes we sometimes have sluggishness and dropouts: We always just blame it on our software. 26 37.14%
We thought sluggishness was a requirement listed in the rule book 9 12.86%
Multiple Choice Poll. Voters: 70. You may not vote on this poll

 
 
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Unread 14-04-2011, 12:58
boomergeek's Avatar
boomergeek boomergeek is offline
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AKA: Mr. D (Dick DiPasquale)
FRC #0241 (Pinkerton Robotics)
Team Role: Mentor
 
Join Date: Feb 2009
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Location: Derry, NH
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Re: Robots not under driver control- does it happen- do you determine why?

Quote:
Originally Posted by Greg McKaskle View Post
Dick, can you give more info on how the connection was done, and what was wrong with it. The reason I ask is, I hope to get an NI engineer to write a best practices article and specifically include this connector. I want to include images of common approaches and explain what is likely to fail.

Thanks,
Greg McKaskle
I'll post pictures next week after we get the robot uncrated.

My imperfect memory believes the stranded wire was not twisted tightly nor was it pushed in deep enough and thus sort of connected mostly as a right angle into the connector- making contact only with the top contact and the middle contact (by the sides of the blades but not the knife edges) and did not make it down to the bottom contact.

After I had wiggled two wires roughly for 5 seconds and got it to lose power, I was then able to pull one all the way out and its length into the connector was much shorter than I expected.

I'm always debating with myself if these types of connectors are better with a light solder to hold the twisted wire or the greater mechanical flex of a tightly twisted wire. I'm fairly certain a poorly twisted wire is a bad choice.
 


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