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Unread 16-10-2005, 18:05
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JVN JVN is offline
@JohnVNeun
AKA: John Vielkind-Neun
FRC #0148 (Robowranglers)
Team Role: Engineer
 
Join Date: May 2001
Rookie Year: 2000
Location: Greenville, Tx
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Re: Getting A Bot To Turn

Quote:
Originally Posted by sanddrag
It could spin in any direction at any time with minimal effort and great ease, but if you wanted to keep it in a straight line, it's not easy, it takes some skill.

.
Turning & driving in a straight line are based off the same thing; turning scrub.

This may be news to some people, but:
If it is hard for the drivetrain to turn, it will drive straight really well.
If it turns really well, it is tough to keep it driving straight.

On 229, we built a drivetrain that turned really well, then taught our drivers to control it.
The more scrub you have, the more load it places on the motors during turning, the higher the current these motors draw.

I like efficiency, and low motor-load; the kids can handle keeping it moving straight, they're sharp kids.
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In the interest of full disclosure: I work for VEX Robotics a subsidiary of Innovation First International (IFI) Crown Supplier & Proud Supporter of FIRST