Siemens SINUMERIK 840D sl Programming Manual page 246

Measuring Cycles for Milling and Machining Centers
5.10 CYCLE996 workpiece: Measure kinematics
The probe must be able to reach the ball
equator of the calibration ball.
The 1st measurement must take place in the
kinematics initial state.
If a rotary axis rotates parallel to the spindle
without offset in a head kinematics (fork
head), the 1st measurement can be made
with spring-loaded probe. The rotary axis
that is not to be measured is not in the initial
position of the kinematics.
At the end of the 3rd measurement, a call calculates the vectors of the measured rotary
axes. The prerequisite for this is that all three measurements have been carried out for the
rotary axis concerned, and that the corresponding measurement results (center points of the
calibration ball) have been saved. The vectors of the machine kinematics are then calculated
in full when both rotary axes have been measured. The measurement counter, parameter
OVR[40], is displayed in the result bit or in the protocol.
For "1st, 2nd, 3rd measurement" or "Calculate kinematics" coding, see parameter _MVAR.
The help displays show the three starting positions (P1, P2, P3) of the probe, based on the
kinematics type of the swivel data record.
Measurement for kinematics with swivel head:
With the 2nd and 3rd measurements, the rotary axis to be measured is rotated around the
largest possible angle. The position of the calibration ball must be stationary during
measurement (1st, 2nd, 3rd).
246
Call 1st measurement
Call 2nd measurement
Call 3rd measurement
1. Measurement P1
(initial state)
2. Measurement P2
Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
3. Measurement P3
Measuring cycles