5 Measuring Cycles for Milling Machines and Machining Centres 08.96
5.2.8 L977 ZO determination on a web (paraxial)
5.2.8 L977 ZO determination on a web (paraxial)
Function and application
The measuring cycle measures points P1 and P2 in the measuring axis on two parallel
surfaces (web). The two measured values are used to calculate the position of the centre point
in the measuring axis in relation to the workpiece zero point (see Fig. 5.16).
The difference is calculated from the set centre point (start position) and the centre point
determined.
The multiplication factor for measurement path ”2a” makes it possible to take into account the
variation range of the blanks (set value).
The probe is located above the centre point of the parallel surfaces on completion of
measurement.
No automatic ZO entry is carried out or alternatively additive input of the measuring axis
difference is performed in the ZO memory specified, depending on the definition of R10.
Preconditions:
• The probe must be called with tool offset and without G53.
• The spindle centre point must be positioned at the centre point of the parallel surfaces in
the measuring axis, the probe ball being positioned above the parallel surfaces in the
applicate.
• R19 is calculated incrementally from the starting position.
The following parameters must be defined prior to call:
Parameters Description
R10 = 0
= 1...4
= 5
No automatic ZO determination
Automatic ZO entry in ZO G54 ... G57
Automatic ZO entry in ZO G58
R13 = 0...359.5 Compensation angle position for monodirectional probe (see
Section 2.5)
R19 Incremental infeed of applicate with sign (travel over the web)
R22 Probe type/probe number (see Section 2.6)
R23 = 32 Measure web
R25
R25 = 0
Variable measuring speed in mm/min
Standard cycle value
R27 = 1...R
max
Number of measurements at same location (typically 1...3)
R28 = 1...R
max
Multiplication factor for measurement path ”2a”
R30 = 1...3 Number of measuring axis (see Section 2.12)
R32 Set value web width
R36 Safe area (centre point coordinate)
See Section 10.2 for result display parameters.
5–40 ©
Siemens AG 1990 All Rights Reserved 6FC5197- AB70
SINUMERIK 840/850/880 (BN)
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