Encoder resolution on fast turning shafts

[jhersh]

Originally Posted by Tom Line

There was a very lengthy discussion about jitter, sampling, and RPM calculation in 2012. To make a long discussion short, if you are using the period function in LabVIEW, you may actually be better off with a 1 count per rotation encoder to maximize the period and make your RPM calculation more accurate.

While much of that discussion still holds to some extent, much of it is not all that applicable given the roboRIO's vastly faster DIO, unless you have a blindingly fast encoder signal.

Originally Posted by Tom Line

We used it very successfully in 2012, and 2013. This will also eliminate any worries you may have about loading the roborio.

The roboRIO and the cRIO does / did all quadrature decoding in the FPGA. It incurs no more or less load on the system sitting unswitched vs. switching quickly.