Hi Hood
No the machine hadn't been homed, this one doesn't have switches as I wanted to keep it simple, but I'd sent it to work zero before shutting down on Friday and I checked it again before starting today.
Which has just made me think, your right. I'd checked the work coordinates were zero but the machine coordinates will have been at the same zero hence the move into the material.
Good thinking Hood, that's that one down to operator error

Now about to start again after being bothered by customers wanting to collect and PAY for jobs, don't they know their supposed to leave it at least 90 days before bothering with that sort of thing!
Spell checked this time :-)
Steve