Operational Sequence - Siemens SINUMERIK 840D sl Programming Manual

Measuring Cycles for Milling and Machining Centers
5.2 CYCLE971 tool: Measuring milling tools, drills
Explanation of example 2
The tool moves in N40 (in cycle) with its point from the starting position in N16 in Y to the
center of the probe (_TPW[0,2] + (_TPW[0,3]) / 2); then in the measuring axis X (_MA=1,
G17) to position (_TPW[0,0] + _FA + R). Here it is lowered to the position in Z (_TPW[0,4] -
_TPW[0,9]. Then measuring is performed in the minus X direction. At the end, the tool
(radius) is again positioned distance _FA in X in front of the probe. In block N50 the tool is
raised 20 mm in Z above the probe. Then the program is ended (N60).
The difference in radius (derived in block N40) of the active tool (T4, D1) is subtracted from
the wear and entered (_CHBIT[3]=1), if they
• deviate by more than 0.04 mm (_TZL=0.04) and
• less than 0.6 mm (_TDIF=0.6).
If the difference is ≥ _TDIF or _TSA, alarms are output.
Values are corrected without empirical values (_EVNUM=0).
5.2.5.4

Operational sequence

Position before measuring cycle call
Before cycle call a starting position must be taken up from which approach to the probe is
possible without collision. The measuring cycle calculates the continued approach path and
generates the necessary travel blocks.
Position after end of measuring cycle
On completion of the cycle, the tool nose or tool radius is positioned facing the measuring
surface at a distance corresponding to _FA.
5-28
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Measuring cycles