Operational Sequence - Siemens SINUMERIK 840D sl Programming Manual

Explanation of example
The spindle is positioned at 15 degrees with SPOS. Measuring point P1 is approached first.
The measuring process is initiated in the negative Z direction (_MA=1, starting position) with
measuring velocity 300 mm/min (_VMS=0, _FA>1). The switching signal is expected by the
probe 1 (_PRNUM=1) within a distance of 2 x _FA=2 mm. Otherwise, an alarm will be
triggered. Measurement is performed once (_NMSP=1). After successful measurement, tool
T3 is _FA=3 mm + tool radius in front of the probe.
The probe is then traveled around as shown in the figure. On the opposite side of the probe
(P2) measurement is performed with a rotated spindle (by 180 degrees). The same cutting
edge is then measured. Measurement is performed with the spindle stopped and without
reversal. After successful measurement, tool T3 is _FA=3 mm + tool radius in front of the
probe. The spindle remains in this position.
The radius and length L2 are determined precisely and tool parameters DP6 and DP4 of T3,
D1 are entered. The values in result parameter array OVR[ ] are also entered.
In block N180, N190, the tool returns to the starting position and the program then ends.
6.3.3.3

Operational sequence

Position before measuring cycle call
Before the cycle is called, the tool must be moved to the starting position, as shown in the
diagram for turning tools. The measuring cycle then calculates the approach position
automatically. This position determines the measuring direction in the measuring axis _MA.
For milling tools, the measuring point on the tool is determined by entered lengths 1 and 2
(please note: SD 42950: TOOL_LENGTH_TYPE). If the radius value is not equal to zero, this
is also a determining factor. The measuring point is then located on the side which the
measuring probe faces (+R or –R). The axial or radial position of the tool must be specified
(_MVAR). This starting position must ensure collision-free approach.
Measuring cycles
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Measuring Cycles for Turning Machines
6.3 CYCLE982 tool: Measure turning and milling tools
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