Hello chaps. Im looking for some info on something i have obtained.

I bid on a liquidation sale recently and amongst the stuff i won was a Renishaw QC10 ballbar.

I have no idea what its for, but someone said it might be used for calibrating cnc equipment. it obviously plugs into a pc as it has an install cd. Theres loads of other gizmos that go with it, i just wondered if any one can tell me what it does and is there a market for this stuff

Regards
CC