L977 Zo Determination In Hole (Paraxial) - Siemens SINUMERIK 840 User Manual

08.96
5.2.5

L977 ZO determination in hole (paraxial)

Function and application
The measuring cycle measures points P1, P2, P3 and P4 in the abscissa and ordinate. These
four measured values are used to calculate the position of the hole centre point in the
abscissa and ordinate in relation to the workpiece zero point (see Fig. 5.13).
The centre point of the abscissa is calculated from points P1 and P2. The probe is then
positioned at the centre point calculated and points P3 and P4 are measured. These two
points provide the hole centre point of the ordinate.
The difference is determined 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 at the centre of the hole when measurement is completed.
No automatic ZO entry is carried out or alternatively additive input of the difference between
the two measuring axes in the ZO memory specified is performed, 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 hole centre point in the abscissa and
ordinate, the probe ball being positioned inside the hole in the applicate.
The following must be defined prior to call:
Parameters Description
R10 = 0 No automatic ZO determination
= 1...4 Automatic ZO entry in ZO G54 ... G57
= 5 Automatic ZO entry in ZO G58
R13 = 0...359.5 Compensation angle position for monodirectional probe (see Section 2.5)
R22 Probe type/probe number (see Section 2.6)
R23 = 21 ZO determination in hole
R25 Variable measuring speed in mm/min
R25 = 0 Standard cycle value
R27 = 1...R Number of measurements at same location (typically 1...3)
max
R28 = 1...R Multiplication factor for measurement path "2a"
max
R32 Set value diameter
R36 Safe area (centre point coordinates)
See Section 10.2 for result display parameters.
©
Siemens AG 1990 All Rights Reserved
SINUMERIK 840/850/880 (BN)
5 Measuring Cycles for Milling Machines and Machining Centres
5.2.5 L977 ZO determination in hole (paraxial)
6FC5197- AB70
5–31