I’ve been having a look at what I have from the old system and if I could use any of it for the E stop circuit and how to go about it. Just wanted your opinions to see if this would work and not cause any damage to anything… or if its just stupid!

I’ve got at the moment a phase and neutral from the 3 phase supply coming into the cabinet that go into fuses, which then go into a large contactor. I was wondering if I could use that contactor set up with a momentary switch, E stop, and relay (which I have from the old setup which are all rated to 600Vac). Then on one of the switched terminals from the contactor could I then feed the 230Vac supply to the transformer which will power the drivers, and on another the supply that goes up to the spindle start button.

With the spindle I should mention it is currently still set up as it would have been when in manual operation. So it is not linked to the CNC side of the machine other than it used to run through a relay so you could only turn the spindle on when the pendant was powered up.

Just reading through what I have written, I guess I could just run the spindle feed through the same relay as the e stop and just switch the 230 through the contactor…

Hopefully someone can make sense of my awful explanation!