# CMM Accuracy Formula

J

#### jmh

From various CMM manufactures, most list their accuracy as MPE and give a formula. How do they determine these formulas?

#### antoine.dias

##### Quite Involved in Discussions
Please check if this site is of any help for you.
They explain MPEE - MPEP & MPETHP
MPEE

Best regards,
Antoine

J

#### jmh

It makes sense, but how are the A and K values determined? That's my main question.

#### antoine.dias

##### Quite Involved in Discussions
I could not find.
Apparently both are constants inherent in the machine (and given by the manufacturer).
Can not help any further

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