View Single Post
  #11   Spotlight this post!  
Unread 14-01-2007, 09:59
Dave Scheck's Avatar
Dave Scheck Dave Scheck is online now
Registered User
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Feb 2003
Rookie Year: 2002
Location: Arlington Heights, IL
Posts: 574
Dave Scheck has a reputation beyond reputeDave Scheck has a reputation beyond reputeDave Scheck has a reputation beyond reputeDave Scheck has a reputation beyond reputeDave Scheck has a reputation beyond reputeDave Scheck has a reputation beyond reputeDave Scheck has a reputation beyond reputeDave Scheck has a reputation beyond reputeDave Scheck has a reputation beyond reputeDave Scheck has a reputation beyond reputeDave Scheck has a reputation beyond repute
Re: Crab drive without a pot

Quote:
Originally Posted by Daru View Post
We were considering using encoders on these shafts...
I would highly recommend not using encoders to determine crab position. Yes they can work, but they require you to precisely position the wheel at startup. Since the encoder doesn't tell you where you are, you could have the wheel turned 90 degrees and the RC has no way of knowing that it's not centered. Pots are far superior in this aspect because they give you an absolute position at startup and the necessary corrections can be made.