Siemens SINUMERIK 840 User Manual page 227

8 Automatic Workpiece Measurement in JOG Mode (SINUMERIK 840 SW2)
8.4.2 Measuring a shaft
The following parameters have to be set:
• The infeed along the applicate axis with sign
• Set diameter of the shaft.
When you press the softkey "MEASURE", a selection display appears requesting you to
position the probe above the centre of the shaft.
Prog. Para. Sett. Data
JOG
Program reset
Workpiece measurement: Measure shaft
Measure.
start
When you press the softkey "MEASUREMENT START" the control automatically switches to
"AUTOMATIC" mode and measuring cycle L887 is selected. The measuring cycle is
processed on NC START.
The measuring cycle measures points P1, P2, P3 and P4 along the abscissa and ordinate. The
actual shaft diameter as well as the position of the centre of the shaft in the abscissa and
ordinate are calculated from these four measured values with reference to the workpiece zero.
The centre point of the abscissa is calculated from points P1 and P2. Then the probe is
positioned to the calculated centre point and points P3 and P4 are measured. The shaft centre
point along the ordinate and the shaft diameter are calculated from these two points.
The probe is at the determined shaft centre on completion of measurement.
The control automatically switches to JOG mode and the selection display "WORKPIECE
MEASUREMENT" appears on the screen with the following results
• Diameter of shaft (actual dimension)
• Deviation from set diameter (difference)
• Centre point of shaft in abscissa and ordinate in machine or workpiece coordinates
8–12
Data I/O Program.
POSITION PROBE
ABOVE SHAFT
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Siemens AG 1990 All Rights Reserved
08.96
Diagnostic User
Mode grp.: 1
Channel : 1
6FC5197- AB70
SINUMERIK 840/850/880 (BN)