> -----Original Message-----
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]


> The STM32 has no problem with MHz level bit flipping.   Reading or
> creating is MHz level is not hard.
> And the Pi3 has to be about the most well understood and documented
> machines on Earth.  they
> are ultra-common.
> 
> The pi still is beat by an Intel desktop PC but the Pi has that GPIO
> header and you can get at signals.  The OS causes unpredictable
> latency so use the STM32 if that matters.
> 
> As for compute power if the Pi is not enough you offload from the Pi
> to the bigger box.    But for machine tools the Pi is overkill unless
> you are doing vision.
> 
And the STM32s are so inexpensive that the STMBL AC Servo drive uses two of 
them.  One to handle the actual 3 phase drive output and one to deal with the 
encoders and user interface etc.  It's a nice solution where the computer side 
(LinuxCNC) is electrically isolated from the 350V Motor side.


John Dammeyer
http://www.autoartisans.com

> 
> 
> --
> 
> Chris Albertson
> Redondo Beach, California
> 
> 
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