Quote:
Originally Posted by 548swimmer
because with 2 cims powering 1 wheel, we will have unlimited power
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...until the wheel slips, at least.
Because of the moment of inertia of a relatively heavy mass swinging around a central axis with little friction (those omnis) you will find such a design difficult to control - even with a wider wheelbase.
Commenting on the sheet metal: Cut the thickness by 30% and put a 1" flange (bent inwards for both) at the top & bottom. Saves weight, adds significant rigidity. Some of the flange can be lost or reduced by the omni wheels for clearance if necessary.
To keep the assembly from racking (parallelogram), consider very thin braces from outside corners, in an X pattern. Even 1/8" wire rope would be fine, since it is in tension.
Your hole pattern could be improved. The solid pieces should all meet at stress points, not tangentially to them. See the small round 'pin' in front, 1/4 way from the left side of the image.
Nice CAD work.
My wife got mad at me when I told her I wanted to name our daughter Lotus. "What you mean the software?" she squawked. "No I mean the flower." I said. geeks, I swear.... - Koko Ed [more] 
07-05-2010, 19:00
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