07.90 1 Introduction
1.3 Probe
1.3 Probe
For determining tool and workpiece dimensions a touch trigger probe is required which
supplies a constant signal (no pulse) when deflected.
The probe must switch with almost no bounce. This is generally achieved by adjusting the
probe mechanically. In addition, ”Software debouncing” is carried out in the NC.
Various types of probe of different make are available on the market. Probes are therefore
classified in three groups according to the number of directions in which the probe can be
deflected (see figure below).
Fig. 1.7 Types of probe
Multidirectional
probe
Bidirectional
probe
Monodirectional
probe
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Milling machines and machining
centres
Turning machine
Multidirectional
probe
Bidirectional
probe
Monodirectional
probe
Tool mea-
surement
Workpiece
measurement
Tool mea-
surement
Workpiece
measurement
yes yes
yes
yes yes
yes
yes
While on turning machines a bidirectional probe can be used, milling machines and machining
centres also permit the use of a monodirectional probe for workpiece measurement. In the
cycles for milling machines and machining centres, the probe type is to be specified by an
R parameter.
©
Siemens AG 1990 All Rights Reserved 6FC5197- AB70 1–7
SINUMERIK 840/850/880 (BN)
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