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View Poll Results: What PPR (CPR * 4) do you use?
1-127 2 6.45%
128-255 3 9.68%
256-511 8 25.81%
512-1023 2 6.45%
1024-2047 7 22.58%
2048-8191 6 19.35%
8192+ 1 3.23%
None, we're too cool for encoders. 2 6.45%
Voters: 31. You may not vote on this poll

 
 
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Unread 06-09-2016, 13:30
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Re: How much PPR do you use on your encoders?

I
Quote:
Originally Posted by Ether View Post
I did not say that. Neither does US Digital.

I said CPR (=Cycles Per Rev per US Digital) is never greater than PPR.

See attachment.


Okay then what exactly is 'cycles per revolution' in that context?

I can see a 100 cycles per revolution encoder yielding 400 pulses per revolution.

I can see a 360 cycles per revolution encoder yielding 1440 pulses per revolution.

Those are all multiples of 4.
I have taken a ton of PCB out of these encoders (they fail a lot and not just in FIRST robots but on my MaxNC CNC tools) and there is no decoding in them.

Are they just being cute and declaring the pulses you could get in the decoder circuit with a 4x decode? Effectively exchanging the meaning of PPR and CPS as other companies use it?

Last edited by techhelpbb : 06-09-2016 at 13:39.
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