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Unread 30-08-2010, 07:53
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
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Re: Stepper motors in swerve drive?

Evan,
You may have gathered from the above discussion that servo and stepper are not interchangeable terms. Servos of the type we use generally have less (sometimes much less) than 360 degrees of rotation. Servos have their uses but hobby servos are meant for low torque/low power.
If you are looking for a nice motor for crab drive steering and don't care about FRC rules, the Globe motors worked very well. With any luck, First will be able to convince Globe to donate in the future. The Globe is a small motor with a transmission attached. It has relatively high torque and slow speed and doesn't draw a great deal of current. Add a pot or some other feedback to the system and you will be able to control steering just fine.
The window motors also served many teams very well this year. Some have reported that the Jaguars were unfavorable for driving these motors but that the Victors did a good job. We used windows with Victors this year.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.