5 Measuring Cycles for Milling Machines and Machining Centres 08.96
5.1.2 L976 Calibrating workpiece probe in reference hole (applicate)
5.1.2 L976 Calibrating workpiece probe in reference hole (applicate)
Function and application
The measuring cycle makes it possible to calibrate the probe in the applicate in a reference
hole, and thus to determine the trigger length. The cycle positions the probe automatically into
the reference hole selected, positioning being paraxial with linear interpolation over the shortest
distance.
As from Version 3.5, the length in the TOA memory can refer to the probe end (MDC
7004.5=1), otherwise it refers to the ball centre (see also Section 1.4.3).
The probe is located above the calibration surface by the amount ”a” on completion of cali-
bration.
Preconditions:
• The probe must be called with tool offset and G53.
• The dimensions of the reference hole in relation to the machine zero point must have been
input in the MDC area.
• The valid reference hole is specified with R12.
• Random start point
• The probe ball must be located above the upper edge of the reference hole.
The following parameters must be defined prior to call:
Parameters Description
R12 Selection of reference hole
R13 = 0...359.5 Compensation angle
position for monodirectional probe (see Section 2.5)
R22 Probe type/probe number (see Section 2.6)
R23 = 1 Calibrating in reference hole (applicate) (see Section 2.7.4)
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 Measuring axis (definition depending on R23)
R31
= 0
= 1
Axial direction (definition depending on R23)
Positive axial direction
Negative axial direction
R33 Zero offset range
R36 Safe area
See Section 10.2 for result display parameters.
5–6 ©
Siemens AG 1990 All Rights Reserved 6FC5197- AB70
SINUMERIK 840/850/880 (BN)
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