Hi Kip,

It's all built into Mach3. The video window has a cross hair and you can superimpose the desired tool size on the display. The traditional way seems to be to mount the camera in the spindle but I'd like a more permanent setup.

I've been following a thread on CNCZONE which links to this site with details of how to use the camera to edge and centre find. Works a treat!

Oh well, looks like another learning curve to climb :)

Regards, Jeff.