HEIDENHAIN TNC 320 (340 551-01) - Manual (Page 382)

382 11 Test Run and Program Run
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.1 Gr
aphics
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 time that the TNC calculates from the duration
of tool movements. The time calculated by the TNC can only
conditionally 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