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Unread 23-01-2017, 17:31
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Re: Minimum Flywheel Encoder CPR

Quote:
Originally Posted by rtse View Post
My team was considering buying cheap 20 CPR encoders for our shooter, reasoning that the encoder on a high-speed flywheel can get away with having less resolution without hurting performance. All the other encoders we have worked with have had 4092 CPR (or 512 CPR on a quadrature), so 20 CPR encoders seemed kinda sketchy to me.

What is a good rule of thumb for minimum CPR for a flywheel of a specific maximum velocity?
If I recall correctly, in 2012 we had 1 count per revolution on our shooter wheel. The trick then becomes smoothing the counts with a low pass filter.

This year, you may want a little higher resolution (due to trying to shoot more balls per second), but I'd imagine 20 counts per revolution would work just fine.
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