On Mon, 25 May 2020 at 02:03, R C <cjv...@gmail.com> wrote: > So I decided to use an RPI (because it is easy to use GPIO pins to read > signals) and write some code to read these encoder signals.
It's pretty easy to read GPIO with LinuxCNC, and at least as easily as with a Pi. Now, an Arduino with dedicated quadrature hardware counters might make sense, but the Pi can't do anything that LinuxCNC can't do, _How_ are you reading the encoder on the Pi? If it is not in the context of a realtime thread then it might be _fast_ but it won't be accurate. I have read encoders at impressive speed inside Excel VBA. It works great except that every few seconds, it doesn't. Because the OS finds something better to do. If your Pi isn't running something realtime-patched (like, for example, LinuxCNC and the preempt-rt kernel) then it might count fast, but it wont count accurate. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
