Go to Post I think that's what they think you will think, therefore you are thinking what they want you to think. - Wetzel [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
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

 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #30   Spotlight this post!  
Unread 20-03-2011, 13:38
AndrewN's Avatar
AndrewN AndrewN is offline
it's alive!
AKA: Andrew Nicholson
FRC #1778 (Chill Out)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 2006
Location: Edmonds, WA
Posts: 48
AndrewN is just really niceAndrewN is just really niceAndrewN is just really niceAndrewN is just really niceAndrewN is just really nice
Re: Robots not under driver control- does it happen- do you determine why?

Quote:
Originally Posted by willishf View Post
In theory the gearing ratio could be 2.166667 from the wheel to the rotation of the optical encoder shaft and the reason for the non integer multiplier. Always feel better when you have nice integer multipliers.
The output shaft of the gearbox has a 12 tooth sprocket, the wheels have 26 tooth sprockets: 360 (encoder counts) * (26/12) = 780

Note: An encoder labeled "360" will give 360 counts at 1X as it counts only the leading edge of A, 720 using 2X, counting leading edges of A&B (or leading and trailing edges of A), and 1440 using 4X which counts leading and trailing edges of both A&B signals.

PS. The cRIO FPGA handles the signals from the encoders and does not cause interrupt overload. Some teams have the encoders wired into CAN controlled jaguars - these do not cause interrupts either.
__________________
Andrew Nicholson
2011 FRC Robot Inspector (Seattle, Portland)
Mentor FRC 1778 "Chill Out", FTC 3018, 3940 "Hawks", 4434 "Heat Misers"

"Everything should be made as simple as possible, but no simpler."

Last edited by AndrewN : 20-03-2011 at 13:40.
 


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 17:04.

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