Siemens SINUMERIK 840D sl Programming Manual page 111

Special features of measurement with rotating spindle
● An additional compensation can be activated with variable _MT_COMP>0. (See
● By default, the cycle-internal calculation of feed and speed is executed from the limit
● The operator can deactivate the cycle-internal calculation via the measuring cycle bit
● If the spindle is motionless when the measuring cycle is called, the direction of rotation is
Measuring cycles
Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
Measuring and compensation strategy chapter).
values defined in array _CM[] for peripheral speed, rotation speed, minimum feed,
maximum feed and measuring accuracy, as well as the intended direction of spindle
rotation for measurement.
Measuring is conducted by probing twice; the first probing action causes a higher
feedrate. A maximum of three probing operations are possible for measuring.
If probing is performed several times the speed is additionally reduced on the last probing
operation. This speed reduction can be suppressed by setting channel-related bit
_CHBIT[22].
_CBIT[12]=1 and specify his or her own values for feed and speed.
Array _MFS[ ] is for entering the values. If the bit is set, the values from _MFS[0/1] are
valid for the first probing and the values from _MFS[2/3] (speed/feedrate) for the second.
If _MFS[2] = 0 only one probing action is performed. If _MFS[4]> 0 and_MFS[2]> 0,
probing is performed in three probing actions; the values from _MFS[4/5] are valid in the
third action.
The monitoring functions from array _CM[] are not active!
determined from _CM[5].
Measuring Cycles for Milling and Machining Centers
5.2 CYCLE971 tool: Measuring milling tools, drills
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