Programming Example - Siemens SINUMERIK 840D sl Programming Manual

Measuring Cycles for Milling and Machining Centers
5.7 CYCLE998 workpiece: Angle measurement and ZO determination
The following additional parameters are also valid:
_VMS, _CORA, _TSA, _FA, _PRNUM, _EVNUM and _NMSP
_CORA only relevant for monodirectional probe.
With _TSA, the difference of the angle is monitored and this value is additionally traversed to
_STA1 with intermediate positioning at an angle. _TSA has the dimension unit degrees in
this case!
Notice
Precise angle definition requires a minimum surface finish at least at the measuring points.
The distances between the measuring points must be selected as large as possible.
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)
5.7.2.2

Programming example

1-angle measurement with CYCLE998
A rectangular workpiece (60 x 40 mm) is clamped in the G17 plane on a rotary table. The
intention is to orient it with its edges running parallel with axes X and Y.
An angular deviation detected is to be compensated automatically through additive ZO
compensation of the rotary axes. The maximum possible angular deviation is taken as _TSA
= 5°. The measuring path is programmed as _FA = 8 mm (max. total measurement path = 16
mm). The measuring points should be 40 mm apart. Intermediate positioning is to be at an
angle.
The rotary table is the 4th axis in the channel (C axis).
Clamping for workpiece:
Zero offset, with settable ZO G54: NVx, NVy, NVz, NVc
5-100
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Measuring cycles