Mecanum. What's Best

[apalrd]

Originally Posted by ratdude747

(true for all drivetrains other than crab)

Not necessarily. For a crab-drive to turn better, it requires 4-wheel independent steering and driving, with complex software and driver interfaces (the second is harder) to align each wheel with it's arc, and drive it at the correct speed.

Most teams that I have seen have independent drive motors (If they have 111-style pods, with integrated motors), and 2 steering motors. If the sides are slaved together (both lefts with 1 steering motor, both rights with 1 steering motor) you can't turn better than a skid-steer. With the front/backs slaved together, you can rotate them in either "car" (front-steer ackerman), "forklift" (rear-steer ackerman), or both, which will help but not be as optimal as 4-wheel independents steering.