The flatness of the optically flat surfaces are measured by techniques using the cmm stylus the stylus can be operated or programmed to take specific accurate measurements along the surface of the object and compare the data automatically to produce a report on the flatness of the object. Do flatness with a cmm do flatness with a cmm chapter 1 do flatness with a cmm how do cmms measure flatness find out with qct cmm the flatness of the optically flat surfaces are measured by techniques using the cmm stylus the stylus can be operated or programmed to take specific accurate measurements along the surface of the object and. The flatness of the optically flat surfaces are measured by techniques using the cmm stylus the stylus can be operated or programmed to take specific accurate measurements along the surface of the object and compare the data automatically to produce a report on the flatness of the object click to see full answer. Do flatness with a cmm bal tec all ball bar information bal tec alphabetical index the vault the tool and die guy profile with no datums drafting standards gd amp t concentricity vs the cmm concentricity is evil ansi y14 5m 1982 geometric dimensioning amp tolerancing pc dmis cmm operation instruction for manual measurement