The frame is made of 2x1x1/8 c channel. The gussets are 1/8 inch and we use 1/4 20s. We direct drive the middle wheel with standard Andymark Super shifters. I put in the bellypan as .25 plywood, but it is really just a space saver for now.
Center drop: 1/8"
I know there are a couple problems with it already. Using the extended output shaft, we still don’t have enough room in the wheel well to run 2 loops of chain. Other than machining a longer outputshaft, are ther other easy fixes? Also, I am not completely familiar with how to use some of the stuff from Andymark: do I need to use 2 hubs on the driven wheel, or do I just need a hub on one side? If I only need one hub, I think we can make the chains fit, but it will still be close.
Are the gussets enough to keep it square? Are there any other problems I should be aware of?
We have never used more than one AM hub per AM wheel. We have used plaction, plastic omni-wheels and mecanum wheels with this setup and have never had a problem.