Checking/Measuring The Machine With The Kinematics Measuring Cycle Cycle996 - Siemens SINUMERIK 828D Manual

2.9
General information on workpiece production
2.9.2 Checking/measuring the machine with the
kinematics measuring cycle CYCLE996
The requirements associated with 5-axis machining can only be met by means of high-precision
machines. As regard to the kinematic transformation, this means that the centers of rotation and
the vectors for NC-controlled or manually alignable rotary axes must be determined and entered
into the control. CYCLE996 is a special measuring cycle that has been designed specifically for
this purpose. It uses a calibration sphere and a calibrated probe to measure the rotary axis
vectors automatically. In practical applications, the cycle makes control easier and improves the
quality of the process, as compensations of the rotary axis vectors (due, for example, to
temperature fluctuations, or other influential factors) can be checked automatically.
For measurement purposes, a calibration sphere is mounted on the table. The sphere is
measured with the probe at three separate swivel positions of the rotary axis and the values
obtained are recorded. CYCLE996 must be called three times for each rotary axis using different
rotary axis positions. The kinematics calculation is performed in full once all the rotary axes have
been measured.
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