please, talk to me about robot drive

[EricH]

A 6WD drop style should turn on a dime. If it doesn't, there may be other problems. Ways to fix a non-turning one include: increase drop (not applicable here, you may even have too much, generating a huge rock), add power, and decrease traction on front and/or back. 330 (one of the champions in 2005) once tried six high-traction wheels. They didn't like the resulting maneuverability, so they put kit wheels on the front. Problem solved. They had both front and back less traction in two different years and never had a problem.

[s_forbes]

Originally Posted by EricH

A 6WD drop style should turn on a dime. If it doesn't, there may be other problems. Ways to fix a non-turning one include: increase drop (not applicable here, you may even have too much, generating a huge rock), add power, and decrease traction on front and/or back.

In addition, it helps if the robots center of gravity is directly over the middle wheels (or as close as possible).

[EricH]

Originally Posted by s_forbes

In addition, it helps if the robots center of gravity is directly over the middle wheels (or as close as possible).

Yes and no. Granted, it'll turn better. It'll also rock better. Having it on one end will simply shorten the wheelbase and you'll turn on four wheels. Take a look at 330 in 2005 and 2007. The CG was aft, and they still turned well.