L976 Calibrating The Workpiece Probe - Siemens SINUMERIK 840 User Manual

5 Measuring Cycles for Milling Machines and Machining Centres
5.1 L975 Calibrating the workpiece probe
5.1

L976 Calibrating the workpiece probe

On milling machines and machining centres, the probe is usually loaded into the spindle from a
tool magazine. This may lead to errors in further measurements caused by clamping toleran-
ces of the probe in the spindle.
In addition, the probe trigger point must be precisely determined in relation to the spindle
centre. This is achieved by the calibration cycle which makes it possible to calibrate the probe
either in a hole (plane) or at a surface (applicate).
The measuring variant is selected by defining R23:
Definition of R23
R23 = xxx00
R23 = xxx10
R23 = xxx20
R23 = xxx01
R23 = xxx02
R23 = xxx23
Applicable types of probe: (see Section 1.3)
• In the case of milling and machining centres the probe must be entered as type 30 in the
TOA memory.
• Multidirectional probe
• Monodirectional probe
• Bidirectional probe
The various probe types are differentiated by defining R22 (see Section 2.6):
The probe ball diameter must only be calculated when the following cycles (measurement
variants) are used:
L978 With differential measurement
L979 Workpiece measurement hole/shaft/slot/web at random angle
5–2
Workpiece probe type 30 calibration
In reference hole (plane)
On reference ball (plane)
On reference cube, surface (plane)
In reference hole (applicate)
In random hole (plane)
On any cube, surface (applicate)
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Siemens AG 1990 All Rights Reserved
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SINUMERIK 840/850/880 (BN)