As we touched on before, we won’t be running the power itself for the lasers up to the cutters. Rather, they’ll be relay-controlled.
The lasers already have provisions for this as a 24VDC control line. I think 5V is possible, but not preferable.
The 2 new blowers on hand are 550W 120V =4.6 amps. We’re gonna switch at least one to a 208v 750W soon. The one I looked at just now unfortunately does not have an accessible box to access the hot wire coming off the cord to insert a relay. We don’t want to like butcher the power cord up and electrical tape a relay onto it, although that would technically work and it wouldn’t be the most dicey thing I’ve ever seen.
So, that’s two 24VDC controlled relays switching 4.6A each.
No solid state relays please
No wireless controls please
The relay itself is trivial, it needs an appropriate housing and receptacle and plug. One circuit can handle 2 (potentially 3) blowers, it would be efficient to use one control box, one 120VAC 15A+ power cord, and two blower outlets. A standard electrical utility box- like you normally put the outlets in- could be usable, and has outlets on it. A NEMA enclosure is another option. We could put DIN rail relays on a rail inside a box.
A separate box would be needed for the 208V blower(s).
Someone did mention this:
That looks like a good prebuilt option. But it’s only one relay that switches all the outlets together, so we’d need two. A little pricey for what we need but still ok. Or does someone want to build this simple thing?