Go to Post It's amazing what you'll find in the FIRST Manual :) - dcarr [more]
Home
Go Back   Chief Delphi > Technical > Electrical > CAN
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #13   Spotlight this post!  
Unread 14-03-2011, 23:05
DonRotolo's Avatar
DonRotolo DonRotolo is offline
Back to humble
FRC #0832
Team Role: Mentor
 
Join Date: Jan 2005
Rookie Year: 2005
Location: Atlanta GA
Posts: 7,014
DonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond reputeDonRotolo has a reputation beyond repute
Re: Unexplained intermittent CAN / 2CAN Jaguar problems at GSR

Quote:
Originally Posted by techhelpbb View Post
If it were a breaker issue, I would expect it to trip and stay that way.
You'd be wrong. They trip for anywhere from a fraction of a second to a second or two. Self-resetting.
Quote:
Originally Posted by techhelpbb View Post
multimeter for resistance from the lugs that would go on the Jaguar back to the power board.

A multimeter was applied to the Jaguar input power while it was run off the ground no major issues were noted (but multimeters are fairly slow to measure).
Nyet. Measure voltage drop along the wire - from power board to input screw, and output screw to motor connector - while passing high current. Only way to spot a bad wire (in this case) is under load. An Ohmmeter will steer you wrong.
Quote:
Originally Posted by techhelpbb View Post
When the robot was misbehaving I did put an oscilloscope one the power supply once it was stationary and I saw no major issues that would account for the fact that the Jaguars at that time were basically locked up.
When they are 'locked up' there's no current draw, you won't see anything of interest - too late in the process.

I think 1676 will be visiting 11 soon, we'll look at the practice bot with you then.

Back to basics. Maybe build a test platform without external influences - just the bare basics - and see if you can reproduce it on the bench. Time-consuming, yes, but ultimately can be valuable. And it'll keep the students involved.
__________________

I am N2IRZ - What's your callsign?
Reply With Quote
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 19:41.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi