Quote:
Originally Posted by Jon Stratis
Yup, that is probably the issue. The CIMple box is a 4.67:1 ratio, while the toughbox mini could have been anywhere from 5.95:1 to 12.75:1, depending on the configuration. It sounds like the easy solution is to either go back to the mini's or add another 2:1 or 3:1 reduction somewhere (look at the monk's to see what reduction you previously had!)
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If they reverted back to the Mini's I think there would be serious issues with the CIM's clashing with the ground/defenses. However it is much better to be able to go over a few obstacles vs none at all because of brown-outs.
Looking at the amount of space you have, you should be able to fit a
http://www.andymark.com/product-p/am-tbmicrooptions.htm enabling you to get the necessary reduction, and still have the clearance(in fact they are more compact than the CIMple box).
In regards to accomplishing the reduction outside the gearbox, your drive belt seems to have quite a lot of slack in it anyway. The easiest fix would be to just use #35 chain. Change the pulley on the output shaft for a small hex bore sprocket say 12 or 15 tooth and a change the pulley on the the drive wheel with a larger one say 30t( check that the sprocket is smaller with chain then the wheel diameter), some spacers can then be used to make up for the decreased width of the sprocket vs pulley
Here are a couple or resources, which should assist you in fixing your problem and prevent similar problems in the future.
http://www.wcproducts.net/how-to-belts/
http://www.chiefdelphi.com/media/papers/3188?