| The precise qualification of the styli ("calibration") is the basic requirement of all measuring processes. Inaccuracies during qualification affect all measuring results - sometimes with disastrous consequences!
This is why it is indispensable to carry out the qualification process as carefully as possible.
Here are a few further tips for avoiding calibration deviations (taken from the book "Genau messen mit Koordinatenmessgeräten" (Correct measurement with coordinate measuring machines) by Hans-Gerd Pressel, expert-verlag, 1997):
- stylus systems: The perfect mechanical condition of joints, such as screw-on surfaces and threads, is as important as the intactness of the stylus spheres. Damaged extensions, cubes, joints and azimuth pieces are a frequent cause of large above-average scattering during qualification.
- stylus systems: Especially the number and condition of the joints play an important
role. The plane surfaces must not be damaged or soiled. Otherwise, the bending behavior of the measuring stylus system can no longer be corrected (see Stylus tip bending correction).
- Reference sphere: The contact surfaces of the reference sphere must be kept meticulously clean, because a tiltable mounting of the reference sphere caused by dirt or mechanical damage has the same effect as a poorly mounted stylus tip.
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