Programming Example - Siemens SINUMERIK 840D sl Programming Manual

Measuring Cycles for Milling and Machining Centers
5.5 CYCLE978 workpiece: Measuring a surface parallel to the axis
5.5.3.2

Programming example

ZO calculation at a workpiece with CYCLE978
A rectangular workpiece is clamped in the G17 plane. The ZO in axes X and Y is to be
checked. Any deviation from the active values should be automatically corrected in settable
ZO G54. The corrected ZO should also be activated so that machining of the workpiece can
start directly after.
The empirical value entered in array _EV[9] (data block GUD5) for the X axis and _EV[10] for
the Y axis are to be included in the measuring results.
The permissible deviation is 3 mm from the setpoint value is assumed. To obtain a minimum
measurement path of 1 mm to the surface, the measurement path is programmed with
_FA=3+1=4 mm (max. total measurement path = 8 mm).
The value of the positional deviation should not be monitored. Therefore _TSA > _FA is set.
Clamping for workpiece:
Zero offset, with settable ZO G54: NVx, NVy, ... (values when measuring)
Workpiece probe 1, used as tool T9, D1, is
to be used.
The probe is already calibrated. Arrays for
workpiece probe 1: _WP[0, ...]
The following is entered under T9, D1 in
the tool offset memory:
Tool type (DP1):
Length 1 - geometry (DP3):
Radius - geometry (DP6):
Length 1 (L1) must refer to the center of
the probe ball (_CBIT[14]=0), as for
calibration.
Careful when positioning! Radius R in
length (L1) is ignored.
166
710
L1 = 50.000
R = 3.000
Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
Measuring cycles