HEIDENHAIN TNC 640 (34059x-05) - Manual (Page 408)

Programming: Special functions
11.3 Adaptive feed control AFC (Option #45)
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TNC 640 | User's Manual
HEIDENHAIN Conversational Programming | 1/2015
The adaptive feed control remains active until you
deactivate it by soft key. The TNC remembers
the setting of the soft key even if the power is
interrupted.
If the adaptive feed control is active in the control
mode, the TNC internally sets the spindle override to
100 %. Then you can no longer change the spindle
speed.
If the adaptive feed control is active in the
control
mode, the TNC takes over the feed rate override
function:
If you increase the feed rate override, it has no
influence on the control.
If you decrease the feed rate override by more
than
10% with respect to the maximum setting,
the TNC switches the adaptive feed control off.
In this case the TNC displays a window to inform
you.
In NC blocks containing
FMAX, the adaptive feed
control is not active .
Mid-program startup is allowed during active feed
control and the TNC takes the cut number of the
startup point into account.
In the additional status display, the TNC displays
various information when the adaptive feed control
is active, see "Additional status displays", page 79.
In addition, the TNC shows the symbol in the
position display.