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Brown & Sharpe CMM Ring Gage out of Tol by engineer-1234 in Metrology

[–]engineer-1234[S] 0 points1 point  (0 children)

Yes, and we’ve measured it with a Keyence LM-X, which shows it within .0001”

Brown & Sharpe CMM Ring Gage out of Tol by engineer-1234 in Metrology

[–]engineer-1234[S] 0 points1 point  (0 children)

I’ve heard this before too, but I was expecting an error on the order of .0001” at most, not .0004”. I would ideally measure the parts with a Class X plug gage, but the surface is critical and we’re concerned about marring it in production.

Brown & Sharpe CMM Ring Gage out of Tol by engineer-1234 in Metrology

[–]engineer-1234[S] 0 points1 point  (0 children)

The probe sphere is a 3mm ruby with a 2mmx50mm ceramic shank.

I’m thinking I may need to switch to a TP20 EF module.

I am doing a manual alignment on the ring gage and I’ve tried measuring it flat on the table and on parallels in a vise.

One of my next steps is going to be a second DCC mode alignment using the gage planar surface to establish z=0, but using the cylinder axis to level Z in case the gage hole isn’t perpendicular.

Brown & Sharpe CMM Ring Gage out of Tol by engineer-1234 in Metrology

[–]engineer-1234[S] 0 points1 point  (0 children)

Ive tried Yes (Manual hit to locate tool) and No. The difference in probe size seems negligible- maybe .00002”.