On Tuesday, February 15, 2022 9:23:34 AM EST Thaddeus Waldner wrote: > On a small cnc machine run by a raspberry pi, I’d like to set up the > main power to accomplish the following: > > 1)pressing the power button/flipping the switch turns on the machine > > 2) pressing the off button, the pi should first perform a shutdown then > turn off the main power to all control power supplies. > > 3) shutting down the pi via the user interface turns off main power to > all control power supplies when finished. > > I’m considering installing one of those powered mains disconnect > switches, the likes of what you find in office photocopiers and > industrial cnc machines. > > Any ideas? > I do something similar, except I don't shut down the pi, it draws so little power, monitor and pi are under 25 watts total, and what little it does draw contributes to the total heat need to keep that very well insulated garage warm. What I am doing, is exporting a logic signal to a couple 40 amp 400 volt SSR's that control ALL power to the machine according to the state of the LinuxCNC F2 button. And since these new 3 phase steppers need a power-down to re-enable them if they fault, those faults also turn it all off, automaticly giving that reset. Should it fault, pull the tool holder, hit F2 to turn it back on, rehome the machine, fix the code that caused the fault, replace the tool holder and hit r.
Not quite what you had in mind, but it is one approach that I'm now doing on all my machines. If you then want to shut down the pi, you can and the machine can't be powered without LinuxCNC running and motion enabled by an F2 push. Take care and stay well, Thaddeus. Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
