Moving up to a bigger machine...

[Davek0974]

Ah, but you have not used a Bridgeport ;)

The head is mounted on a swivelling, ram that can (and does) move in any position - the chances of the macro finding the fixed plate are practically zero after the head has been moved ;)

[magicniner]

Offsets ;-)

[Davek0974]

Yes but how?

There is no toolholder as such - just a collet.
The Knee height (i'll call it Z2) is adjustable 300mm.
Only the quill- Z1 Is homed and controlled.

Seems too many variables for a simple offset, unless I am not seeing the whole picture yet;)