Pitfalls of using the granite (NOT THE PART) as a Datum Alignment Feature

I can't point you towards a specific article. I can tell you exactly why its bad, though.

If you're in an industry that procedurally requires the use of calibrated measurement equipment (AS9100, ISO 13485, ISO 9001, etc...) then you can't use the CMM's granite table as a datum simulator because it isn't calibrated as a part of the machine (or at all). The table is just that. A table. By design, it is a reference only surface that you are ONLY to put stuff on for the machine to then measure. It is pretty flat (my table is 0.0025 across the entire surface and I have a 7107) but without that precision lapping and certification from a 17025 facility, its just a rock.

What I advise in this situation:
You could also have your company make an inspection fixture, measure the fixture itself & create an origin, THEN load your part onto it and go to town.

I can't point you towards a specific article. I can tell you exactly why its bad, though.

If you're in an industry that procedurally requires the use of calibrated measurement equipment (AS9100, ISO 13485, ISO 9001, etc...) then you can't use the CMM's granite table as a datum simulator because it isn't calibrated as a part of the machine (or at all). The table is just that. A table. By design, it is a reference only surface that you are ONLY to put stuff on for the machine to then measure. It is pretty flat (my table is 0.0025 across the entire surface and I have a 7107) but without that precision lapping and certification from a 17025 facility, its just a rock.

What I advise in this situation:
You could also have your company make an inspection fixture, measure the fixture itself & create an origin, THEN load your part onto it and go to town.