HEIDENHAIN TNC 410 ISO Programming - Manual (Page 396)

370 11 Test Run and Program Run
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Measuring the machining time
Program Run modes of operation
The timer counts and displays the time from
program start to program end. The timer stops
whenever machining is interrupted.
Test Run
The timer displays the approximate time which the
TNC calculates from the duration of tool
movements. The time calculated by the TNC cannot
be used for calculating the production time because
the TNC does not account for the duration of
machine-dependent interruptions, such as tool
change.
Activating the stopwatch function
Shift the soft-key rows until the TNC displays the
following soft keys with the stopwatch functions:
Stopwatch functions Soft key
Store displayed time
Display the sum of stored time
and displayed time
Clear displayed time
The soft keys available to the left of the
stopwatch functions depend on the
selected screen layout.