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?



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