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Unread 07-01-2009, 09:48
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ExarKun666 ExarKun666 is offline
Ben Error/MC Ben/NC Ben
AKA: Ben Kellogg
FRC #2429 (LCEC)
Team Role: Programmer
 
Join Date: Dec 2007
Rookie Year: 2008
Location: La Caņada, CA
Posts: 208
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Re: Our Team Needs Help on the Drive!

Quote:
Originally Posted by Matt H. View Post
If you make your front wheels crab turning will be much more efficient. by turning your front wheels 90 degrees you will be able to turn on a dime--With this design I would still recommend you power your rear wheels independently to assist turning. This would make a killer design which could turn easily and maintain your design objectives. For this design I would use a CIM run through a custom gear box direct drive for each rear wheel. In the front I would use crab modules consisting of an upward CIM and a miter gear set up. Two FP motors would rotate the crap modules.
Well throwing another question out there that I have, for crab drive, I have never really seen one so I am not sure how they work or how to set it up. From my understanding this is what it would look like (correct me if I'm wrong)
|\--------/|
|--|----|--|
|=|----|=|
|--|----|--|
|---\__/---|
|-----------|
|oo------oo|
_________

(This is not to scale, (-) is just a space so ignore them)
The circles (o) would be the wheels powered, and pointed to the front of the bot, the (=) would be wheels facing <- at a 90 degree angle, and powered. Is my interpretation of crab drive front wheels correct?
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Last edited by ExarKun666 : 07-01-2009 at 09:51.