Measuring Principle; Probe Signal Evaluation - Siemens SINUMERIK 840 User Manual

1 Introduction

1.5 Measuring principle

1.5 Measuring principle
1.5.1

Probe signal evaluation

Two inputs for connecting touch trigger probes are provided on the SINUMERIK interface
module.
If a measuring point is to be approached, a travel command is transmitted to the position
control loop and the probe is moved towards the measuring point. A point behind the expected
measuring point is defined as the position setpoint value. The actual axis value at the time of
the switching position is measured and the drive is stopped as soon as the probe makes
contact. The remaining "distance to go" is deleted.
NC
Measuring
cycle
Delete
Actual
distance
value
to go
Actual value
measurement
Position control
Fig. 1.15 Probe signal evaluation
1–14 ©
Siemens AG 1990 All Rights Reserved
SINUMERIK 840/850/880 (BN)
07.90
Probe
6FC5197- AB70