Hi Lee,

Something like that, yes... not entirely sure if it's contactor or a relay... The electrical schematics are in the bottom of one of the electrical cabinets.... and are extremely well soused in decades of oil (cutting oil or lubricating oil, or a mix...) I think if I try to touch them they'll just disintegrate :(

The mill is, unfortunately, up for sale ATM, as I'm closing my big workshop, and I've nowhere to put it & no way of moving it. If anyone's interested in it, drop me a line.