Thread: Determining Motor Speed?
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Unread 14-02-2012, 13:25
theprgramerdude theprgramerdude is offline
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Re: Determining Motor Speed?
Quote:
Originally Posted by Ether View Post
You're not suggesting that they're gearing down 2.7:1 and then gearing back up 1:3 are you? What would be the point of that?


But suppose they were.

775-18 free speed is 13000 rpm.

13000/2.7*3 = 14444 rpm.

So if the output is 10000 rpm then the 775-18 would be spinning at 69% of its free speed. It would be pulling 28 amps and burning over a hundred watts of waste heat. (I'm assuming here that the OP meant 10000 rpm at 12 volts; maybe that's not what he meant).

In any event, the tangential speed of an 8" diameter wheel at 10000 rpm is 238 miles per hour.
I'm pretty sure the photosensors for counting shots will still register individual chunks of ball landing in the nets, even if the rest of the ball is obliterated on launch
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