Thanks for all the replies guys!

This is the machine, but no model number anywhere:

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ID:	5220 A floor print of 6' x 4' x 5 1/2' tall. I haven't fully stroked the drives as I was scared of sending a reverse voltage through the driver board, but I'm estimating 600x600x200mm.

So far HME haven't come back to me, but I'm thinking along the same lines as you guys. As Jazz says, it is crawling with safety interlocks that I will disconnect to save my sanity, but I have gone through the safety circuitry & it is all in place. When all contacts are closed the driver board axes all light up green.

The steppers are Astrosyn L281 & they sent me this data sheet: http://www.slideshare.net/v8wgm/astr...-stepper-motor

The transformer is an Intron 25647 but I think I'll need to contact the maker for a data sheet.

I already have a Heiz High-Z S-1000/T router running with Heiz's own Zero2 controller & Win PC-NC. The steppers on the Heiz machine are Sanyo Denki StepSyn NEMA 23's. I was wondering, if compatible, I could purchase another Zero2 controller from them & another seat of Win PC-NC to standardise things, as I'd be keen on another Heiz machine in the future.
The manual for the controller is here: http://www.slideshare.net/v8wgm/heiz-controller-zero2

I asked Heiz what they thought and got the response 'I think your stepper-motor have only 1,7A and our controller have 2,2A.You must try it and check how it works.' If the current supply is higher, is that normally not OK? I'm not sure if I want to risk experimenting with the controller off the Heiz in case I end up with both machines down

I hope the links work OK.

Gavin