gage r&r

[[Jo...]]

Have a new engineer here wanting to do a gage R&R on the cmm. Wants to do it on a raw casting. My opinion bad idea seeing as i check castings everyday. What is others opinion? Have the zeiss training block could do it on.

[[DW...]]

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 If he is trying to prove the CMM is repeatable, no to the casting. There's too much variability with raw parts. Use a more refined, known artifact like your training block. If he is looking at production measurement system capability, then let him use the castings. I'd do both, so you can show the variability that exists between them.