Probe - Siemens SINUMERIK 840 User Manual

07.90
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).
Multidirectional
probe
Fig. 1.7 Types of probe
Tool mea-
surement
Multidirectional
yes
probe
Bidirectional
probe
Monodirectional
probe
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
SINUMERIK 840/850/880 (BN)
Bidirectional
probe
Turning machine
Workpiece
measurement
yes
yes
6FC5197- AB70
Monodirectional
probe
Milling machines and machining
centres
Tool mea- Workpiece
surement measurement
yes yes
yes
yes
1 Introduction
1.3 Probe
1–7