Alignment problem while measuring thread pitch of large thread gauges on the profile-measuring machines

Abstract

The problem described in this paper arises while measuring pitch of the large-scale thread gauges with a profile-measuring machine. Analytic estimate of the thread gauge alignment uncertainty is given, which results in the accumulated error of the thread pitch measurement. The results proposed in this paper should be considered as an additional source of uncertainty while inspecting the thread pitch on profile-measuring machines.