What you're saying sounds logical, and does make sense with some of the error messages that have flagged up, e.g. buffer battery voltage error, but the battery tests ok, and external emergency activated when the emergency stop button has clearly not been pressed. Both these 'hardware' items are quite a distance apart on the machine, so I guess I'm looking for some common area like a multi-pin connection that may carry several of these signal wires.

Another regular message is 'axes (spelt like that!) board voltage error 24V', but the transformer tests good, along with the wires to the DIN rail connections. I'm not sure where there could be a common area that carries all those wires.

Time to get the multimeter on the case!

Thanks for the pointer, it may take some time but I'll get back to you with the results.

Of course your comment on correct parameter set up may also need checking, there are a couple of suspects for other issues in there. I have a manufacturers floppy disk which allegedly contains the factory parameters, but no floppy drive on the machine, and my PC won't read it. Anyhow, I'll leave that one for another day, as that's not causing the issue at hand.

Regards!

Quote Originally Posted by JAZZCNC View Post
I don't know anything about the Fagor Control but I'm not so sure your problem is the Control.? If these errors are Phantom's and the control is reporting these has external control errors like Limit's etc then it's more likely electro/mechanical than software.

Electrical noise (EMF) is major problem for any CNC machine and if your machine is suffering form poor grounding or working on a noisy eletrical line it will be affected by strange random happenings.

Essentially the Controller does just that and controls or responds to external devices ie: Servos, limits, sensors etc. So provided it's got the correct parameters setup and turns on then they usually work fine and often these kind of problems come from faulty sensors/wires etc sending false reports back.
So If the machine is old then wiring could be a problem so checking all cable connections, esp the Ground and shield wires is a good place to start.

Shame your not closer otherwise I'd have come take a look for you.!! . . . Sorry can't help more but Good luck tracking down.!