Go to Post And we had to walk both ways to the venue from our hotel! Uphill! Barefoot over broken glass! - IMDWalrus [more]
Home
Go Back   Chief Delphi > Technical > Programming > NI LabVIEW
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
  #1   Spotlight this post!  
Unread 16-02-2009, 22:19
dmlawrence dmlawrence is offline
MIT '14
FRC #1751 (Warriors)
Team Role: Alumni
 
Join Date: Jan 2007
Rookie Year: 2006
Location: Long Island
Posts: 63
dmlawrence is an unknown quantity at this point
Encoders not working

I am using the quadrature encoders that were included in the kit. I am experiencing an odd problem where the signal suddenly drops out soon after we start driving. I have attached a graph of the signal (after a low-pass filter) that shows the dropout very clearly. Here are some possible causes that have occurred to me

(1) The signal, which is passed through two solder joints and then a DB-25 connector, is somehow degraded to an unusable point.

(2) The camera processing is interfering with the encoder counting. (CPU usage is in the 80-90% range.)

(3) Something else?

Which of these is most likely? Any help will be most appreciated.

David
Team 1751
Attached Thumbnails
Click image for larger version

Name:	screenshot.jpg
Views:	47
Size:	140.6 KB
ID:	7488  
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
jaguar not working Bwood16 Motors 12 13-02-2009 13:22
cRio not working...? Jack Gillespie Programming 22 13-02-2009 13:07
p2 not working? Lone_Wolf92c Programming 5 22-02-2008 08:49
IR Board Not Working (But NOT Fried) itsme Electrical 2 18-02-2008 06:11
Encoders not changing... paulcd2000 Programming 28 18-02-2007 08:34


All times are GMT -5. The time now is 10:35.

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