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
See also
Variable measuring velocity: _VMS (Page 2-14)
Offset angle position: _CORA (Page 2-14)
Tolerance parameters: _TZL, _TMV, _TUL, _TLL, _TDIF and _TSA (Page 2-15)
Measurement path: _FA (Page 2-16)
Probe type, probe number: _PRNUM (Page 2-17)
Empirical value, mean value: _EVNUM (Page 2-18)
Multiple measurement at the same location: _NMSP (Page 2-19)
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)
5-74
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Measuring cycles