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Unread 16-04-2007, 14:17
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Re: pic: 1683 Concept 8 Wheel Drive

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Originally Posted by sdcantrell56 View Post
8 wheel drive can be very maneuverable if the middle 4 wheels are dropped. For instance I have them dropped 1/8" which is the same drop that we have on our 6 wheel drive robots creating a rocking effect and eliminating scrub steer. Polish I do agree we could always have more wheels. Actually my brother is pushing for 10 wheels so that one can be lowered in the center. I did see your robot at the championship and that takes it to the max. I wish we could do something like that however I don't know how much more it would help us and we do not know how to properly tolerance for a gear drive like that. I also forgot my whole reasoning for having the braces offset into the frame. If you notice the front and back of the side plates are angled to provide clearance for climbing any ramp. In order to put channel on the front I would have to get rid of the slope unless there is some other way that I am missing
The 14 wheeler is an extreme but it works for us. Something that we did that may work for you is rather then offsetting the middle wheel 1/8" (or wheels) is off setting all the wheels on an arc. On my robot, we set the axis of the wheels on a radius of a 38 foot arc.

On another thing. Orginally our gearbox was also intregrated to be a part of side panels, later we found out it was pain when we had to make a fix to the gear box. This year, we made the entire gearbox modulur. All we do is pull off 4 bolts and unwire the motors and the whole gearbox comes out.
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Unread 16-04-2007, 14:22
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Re: pic: 1683 Concept 8 Wheel Drive

That arc idea sounds interesting however with only 8 wheels I think setting them on an arc would be the same as lowering the 4 middle wheels. Also about integrating the transmission into the side plates, I posted some pictures of what im talking about and they would also come off with 4 bolts. I greatly appreciate your ideas though as I really love your robot.
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