STYLUS ORIENTATION

摘要

A measurement probe ( 10 ) has a stylus part ( 12 ) connected to it by means of a ball and cup universal joint ( 24/25 FIGS. 2 and 3 ). The stylus part ( 12 ) is reorientable relative to the probe and during reorientation is held by means of magnetism or suction to an at tractor ( 50 ) whilst the probe ( 10 ) is moved. The stylus part ( 12 ) is held in static relation to the probe during measurement by means of magnetism or vacuum. The stylus part ( 12 ) may be exchanged for another, e.g. 12 a or 12 b' at rack ( 100 ). During exchange the magnetism or vacuum holding ( 15 ) the probe and stylus part in static relation is reduced.