Calibrate Probe - Radius In Ring (Cycle976) - Siemens SINUMERIK 840D sl Programming Manual

Measuring variants
2.3 Measure workpiece (milling)
2.3.2

Calibrate probe - radius in ring (CYCLE976)

Function
With this measuring version, the skew of the workpiece probe as well as the trigger values
and the radius of the probe ball can be calibrated in a calibration ring (in the axes of the
plane).
The probe calibration in the ring can be on the basis of an unknown or known center point in
the ring. With known center point, this corresponds to the starting point.
Calibration is also possible taking into account a starting angle when using the "start at ring
center" calibration version. Any obstacles in the measuring path or at the measuring point
can be avoided when using a starting angle.
Measuring principle
Calibration always starts in the positive direction of the 1st axis of the actual machining
plane. 8 calibration positions are to be acquired, divided into 2 passes. Depending on the
probe type, the passes are made with a uniform spindle position or a reversal of 180
degrees.
During the calibration process, the center point of the calibration ring (corresponding to the
calibration version) and its distance to the start position are determined.
The calibration data / trigger values are significantly influenced in the result by the following
variables:
● Physical probe ball radius
● Design of the probe
● Measuring velocity
● Calibration ring with corresponding accuracy
● Correct mounting of the calibrating ring
Figure 2-9
86
Calibrate: radius in ring (CYCLE976)
Programming Manual, 02/2011, 6FC5398-4BP40-0BA0
Measuring cycles