Patent ID: 6854193

Claim:
A method for determining corrective parameters of a rotating swivel unit to which a sensor of a coordinating measuring apparatus is attached with said sensor measuring in at least one dimension, the rotating swivel unit having a swivel joint and the method comprising the steps of: carrying out a calibration of said sensor for at least three rotational positions of said swivel joint; computing at least parameters of a first parameter field (M S ) for each of said rotational positions with said first parameter field (M S ) describing the transformation of a sensor coordinate system (u,v,w) into a machine coordinate system (X M , Y M , Z M ) of the coordinate measuring apparatus; computing parameters of a second parameter field (p s ) describing an offset of said sensor coordinate system (u,v,w) with respect to a point (AB) in said machine coordinate system (X M , Y M , Z M ); and, determining corrective parameters of said swivel joint from said parameters of said first and second parameter fields.