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Re: pic: 1097 Direct Drive 01
Well, to answer the efficiency question, it's very efficient. The miter gears are aligned within .0005" and transfer the power better than chains. We have had chain problems before. Last year we threw Motorcycle (40 gauge) chain many times, so it removes the need to tension or worry about chains. We went through the entire sac regional without damaging it at all. The ony thing we had to do was check the set-screws to be safe.
As for the drive-shafts, they are .049" wall steel tubing.
As for the efficiency on the miter gears, they are just as effieient as straight-cut spur gears.
We lightened all the gears in the gearbox with 6 holes in each, similar to the wheels if you have seen them. Overall, the entire robot weighs 106.8 lbs, so we have no weight concerns.
And, as Sanddrag said, we did it mainly since no one else has done it.
My mechanic told me to tell you that there are 46 bearings and 42 set-screws in the drive-train.
And as for shaft-drive/direct-drive, we've always seen shaft-drive as a sub-set of direct-drive.
-Tony K
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Horray for most things! -George Carlin
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