HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 514)

Test run and program run
17.1 Graphics
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TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
Measurement of 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 for the duration
of tool movements that are executed at feed rate. Dwell times
are included in the calculation by the TNC. 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 row until the soft-key for the
stopwatch functions appears
Select the stopwatch functions
Select the desired function by soft key, e.g. saving
the displayed time
Stopwatch functions Soft key
Store displayed time
Display the sum of stored time
and displayed time
Clear displayed time
During the test run, the TNC resets the machining
time as soon as a new
G30/G31 blank form is
evaluated.