Patent ID: 8744160

Claim:
A method of measuring thread parameters of a threaded object coated by at least one layer of coating material, comprising: obtaining a shape of the threaded object including a nose; identifying a first spatial reference system for the threaded object comprising first co-ordinate axes X′, Y′, Z′; identifying a second spatial reference system comprising second co-ordinate axes X, Y, Z; determining at least one trajectory on the threaded object in the second spatial reference system, the trajectory including selected measurement points; obtaining first position data for the threaded object at the predefined measurement points of the at least one trajectory in the second spatial reference system; converting the first position data for the threaded object from the second spatial reference system to the first spatial reference system to yield first measurement results; coating at least a portion of the threaded object with a selected coating; obtaining second position data for the coated, threaded object at the predefined measurement points of the at least one trajectory in the second spatial reference system; converting the second position data for the coated, threaded object from the second spatial reference system to the first spatial reference system to yield second measurement results; and determining the thickness of the coating from a comparison of the first and second measurement results.