> > -----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.
There are good reason to place Micro controller on rectified negative rail while other signal need to be electrical isolated. This might be the reason two micro controllers are used. Nicklas Karlsson _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
