Quote Originally Posted by m_c View Post
Are you using a charge pump?
If not, it sounds like the parallel port doing random things as things boot up.
If you've not got a charge pump, a quick fix would be an extra switch to keep the lathe powered of until the PC has booted. It's not ideal, but it would work, provided you remember to turn things on in the correct order.
Not sure what a charge pump is. It has a normal 24V contractor that fires up the coolant pump (single phase probably around 0.3KW). I may disconnect the main motor drivers and see if it still does it. Something seems to want to initialise. It could be the PC too, its not a good machine as such but we are fairly limited with the older interfaces (unless there are trust worthy add on cards for newer machines).