Siemens SINUMERIK 840 User Manual page 225

8 Automatic Workpiece Measurement in JOG Mode (SINUMERIK 840 SW2)
8.4.1 Measuring a hole
Prog. Para. Sett. Data
JOG
Program reset
Workpiece measurement: Measure hole
Measure.
start
When you press the softkey "MEASUREMENT START" the control automatically switches to
"AUTOMATIC" mode and measuring cycle L887 is selected which runs in the automatic
channel defined by the machine tool manufacturer. The measuring cycle is processed on NC
START.
The measuring cycle measures points P1, P2, P3 and P4 in the hole in the abscissa and
ordinate. The actual value of the hole diameter and the position of the centre point of the hole
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 hole centre
point along the ordinate and the hole diameter are calculated from these two points.
The probe is at the determined hole 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 hole (actual dimension)
• Deviation from set diameter (difference)
• Centre point of hole in abscissa and ordinate in machine or workpiece coordinates
8–10
Data I/O Program.
POSITION PROBE
INTO THE HOLE
©
Siemens AG 1990 All Rights Reserved
08.96
Diagnostic User
Mode grp.: 1
Channel : 1
6FC5197- AB70
SINUMERIK 840/850/880 (BN)