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Unread 19-01-2010, 03:44
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Mechanical Engineer
AKA: Craig Boezwinkle
FRC #2811 (StormBots)
Team Role: Mentor
 
Join Date: Oct 2008
Rookie Year: 2009
Location: Chicago, IL
Posts: 217
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Mecanum Specifics- Layout, Ratios, etc

As a second year team, we're getting prepared to start experimenting with our first Mecanum drivetrain. We have a set of the 6" wheels from AM en route, and while we wait we were doing some digital design. I have a few questions that I was unable to answer from previous threads:

1. Does the layout of the wheels have a big impact on the overall performance of the bot? We could either lay them out in a square or rectangle - does it make a big difference (especially from a programming standpoint)?
2. Is maximizing the footprint a big deal? Put another way, should the wheels be pushed as far toward the corners as possible?
3. What have you used as a successful final gear ratio, and what type of gearbox did you implement. A few earlier posts suggested direct drive off a Banebots transmission, either 12:1 or 9:1. We don't have any of those, and rather than dropping $400 on some trannies we'll probably try to adapt the Toughboxes we've got. There are some good ideas floating around, just wanted to get a feel for what others have tried.

Thanks for the support.