Thread: Minibot motors
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Unread 16-03-2011, 04:11
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Re: Minibot motors

Quote:
Originally Posted by Ether View Post
Tom, you said the 10.4:1 mod was easy. Would you be willing to post a bit more detail how you did this? Thank you!

Here is how we make 10.4 to 1 gear boxes.

We make a spacer out of legal material that fits between the gear on the output shaft and the output end bushing that makes that gear mesh with the input gear.

Then you must machine the input end of the output shaft to fit in the bushing and provide the proper thrust clearance.

The input gear stays on its' original idler shaft with the original spacers and there is no need to modify the case. This keeps the machined lip that keeps the end plate square.

The down side to this method is that the output shaft is a precision polished piece and you can't replicate that surface finish. That means accelerated wear of the input end bushing.

In our prototype boxes there is noticeable wear, however that includes a number of minutes of run-in time and dozens of runs between the different wheels and frames we tried. That set is getting retired since we have more transmissions than motors, having let the magic smoke out of a couple.

We also tried the rod wheels w/o the trans and we are not going that route. Yes the direct drive gave us our record time but was no where near as consistent.
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