pic: Robot Concept CAD

[scottydoh]

Originally Posted by MikeBrock

This is very true. How about waterjetting 1/8" plates for the top and bottom to hold together 2x1 tubing?

I see to need for a plate on both the top and the bottom. 1/8th or 3/16th plate on top of 1x1 tubing would be plenty. Or better yet, why not just use the provided kit bot frame? For the past 3 years my team has been using the kit bot frame with a water jet cut top plate for mounting and to keep things square (mind you, prior to 2008 they insisted upon custom building an entire frame, bottom plate + 6 walls out of 3/16 water jet cut plate...so much excess weight and time wasted on design). With the kit bot frame, we can usually have the chassis set up within the first week.

EDIT: Also, just another thought, I don't know how familiar you are with the Mecanum system, but each wheel needs to be powered individually, that means each wheel gets its own motor and gearbox. And from the looks of your drawing (which by the way is indeed very nice) Your wheels are outside the frame perimeter and thus illegal, unless of course your frame was smaller than 28x38.