Siemens SINUMERIK 840D sl Commissioning Manual page 189

Preconditions for starting measuring functions
To ensure that no erroneous traversing movements due to part programs can be carried out,
the measuring functions have to be started in <JOG> mode.
CAUTION
When traversing movements are carried out within the framework of measuring functions,
no software limit switches and working area limitations are monitored, since these are
carried out in follow-up mode.
Prior to starting traversing movements, the user must therefore ensure that the axes are
positioned such that the traversing limits specified within the framework of the measuring
functions are sufficient to prevent collision with the machine.
Starting measuring functions
Measuring functions initiating a traversing movement are only selected using the specific
softkey. The actual start of the measuring function and thus of the traversing movement is
always carried out with <NC-START> on the machine control panel.
If the main screen of the measuring function is quitted without the traversing movement
being initiated, the selection of the traversing function is canceled.
Once the traversing function has been started, the main screen can be exited without any
affect on the traversing movement.
Note
<JOG> mode must be selected when measuring functions are started.
Further safety notices
The user must ensure that when the measuring functions are used:
● The <EMERGENCY STOP> button is always within reach.
● No obstacles are in the traversing range.
Canceling measuring functions
The following events will cancel active measuring functions:
● Hardware limit switch reached
● Traversing range limits exceeded
● Emergency stop
● Reset (mode group, channel)
● NC STOP
● No controller enabling command
● Canceling drive enable
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
Optimize the drive.
11.1 Measuring functions
189