Thread: Drivetrain help
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Unread 08-01-2002, 21:54
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Kit Gerhart Kit Gerhart is offline
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Quote:
Originally posted by Michael Krass
By coupling the Chiphua motor to the drill motor before the transmission, am I correct in believing you're attempting to couple a shaft to that tiny little nub of the drill shaft that protrudes from the back? . . . like the TechnoKats motor mounts from last season?

I'm a bit scared of doing that with my team, so we were considering gearing the Chiphua motor output to the drill motor output after the output stages of the drill gearbox. As such, we'd have to keep the drill in either a low or high position with no possibility of shifting via the transmission, though we don't expect that to be a problem for us.

Are there any inherent risks or problems to this approach that I'm ignoring completely? I'd like to think this is easier than coupling before the drill transmission, but my experience with drive trains is limited, to say the least.
If you want to run without gear change, running the output of the drill transmission and a geared down output from Chiphua motor together should work well. If you are using four wheel drive, you could run the output of the drill gear box to the front wheels and the Chiphua motor output, geared down to match, to the rear wheels or vice versa. If you are using a track drive, you can connect one set of motors to each end or combine the outputs at some central point.

The benefit of using gear change is that you can gear high enough to go very fast in high gear, as long as you are not towing three goals, there are not tugging matches, etc. but in low gear you have tremendous push without tripping breakers, overheating motors, etc.

I suspect that we may have a new 'capability' this year, that of tripping the 60A breakers if we run the drill motors along with the Chiphua motors for our drive train, and are geared too high. This would not be fun, as you watch your robot sit 'dead in the water' for the last 2/3 of a match.
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