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Chaps, thank you all for your help! I've now resolved the issue and it wasn't anything to do with the bed limits I'm embarrassed to say; it was all down to the material size and how I was proposing to machine it.

Across the X co-ordinate, my finished piece was to be say 195mm. I was cutting it out using a 6mm end mill on an outside profile tool-path. My material size therefore needed to be specified as a minimum of 207mm (195 + 6 + 6) across its X axis but in set-up, I had set it as 205mm, hence it showed as 2mm outside the limits of the material!

A silly mistake but one I've have learned a great deal from, thanks to you chaps and to sitting down and actually thinking about the problem! Please don't let this demonstration of my stupidity stop you from attempting to help me again in the future; I'll almost certainly need it!

Once again, thank you so much for your help!

Regards,

Nigel

nigbing wrote:
I think you still might have the wrong end of the stick, as LinuxCNC has absolutely no idea how big your material is, or where it is. It just waves the cutter about and doesn't care if it is material, air, or the machine itself that it is cutting through.