Quote:
Originally Posted by Max Boord
Built your chassis slightly floppy. This allows all the wheels to touch the ground on imperfect terrain (like carpet.)
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the times we've built mechanum, we've discovered its been really important for all four wheels to be on the ground. If your 'after school project' has the ability to have independent suspension, I recommend it. We built a robot with simple gas struts on the four corners and it kept the wheels on the floor. Even with a flat floor, when you corner, stop, etc, you can lift wheels and lose control.
As for which gearbox, even when we've done Andymark wheels it made sense to use Banebot planetary gear boxes. Since you need a motor on each wheel anyway, these work great and make a nice installation. Unless you need more power, like two CIMS on each wheel.
http://banebots.com/c/P80K-S4 just something different to consider.
And as for motors, everyone here is used to FRC rules, so we don't suggest alot of motors that aren't FRC legal, but there are many motors out there. The CIM at a mere 337 watts isn't close to the most powerful available. It's just what we know. Most scooters are in the 500w range and hub motors go alot higher. Depends on what you need power-wise. CIMS are a great value, but don't be afraid to look around.