HEIDENHAIN TNC 640 (34059x-02) - Manual (Page 383)

Adaptive Feed Control Software Option (AFC) 11.3
11
TNC 640 | User's Manual
HEIDENHAIN Conversational Programming | 5/2013
383
Remember the following before you record a teach-in cut:
If required, adapt the control settings in the AFC.TAB table
Enter the desired control setting for all tools in the
AFC column
of the tool table TOOL.T
Select the program for teach-in
Activate the adaptive feed control by soft key, See "Activating/
deactivating AFC", page 385
When you are performing a teach-in cut, the TNC
shows the spindle reference power determined until
this time in a pop-up window.
You can reset the reference power at any time by
pressing the PREF RESET soft key. The TNC then
restarts the learning phase.
When you record a teach-in cut, the TNC internally
sets the spindle override to 100 %. Then you can no
longer change the spindle speed.
During the teach-in cut, you can influence the
measured reference load by using the feed rate
override to make any changes to the contouring feed
rate.
You do not have to run the entire machining step in
the learning mode. If the cutting conditions do not
change significantly, you can switch to the control
mode immediately. Press the EXIT LEARNING soft
key, and the status changes from
L to C.
You can repeat a teach-in cut as often as desired.
Manually change the status from
ST back to L. It
may be necessary to repeat the teach-in cut if the
programmed feed rate is far too fast, and forces you
to sharply decrease the feed rate override during the
machining step.
The TNC changes the status from teach-in
(L) to
controlling
(C) only when the recorded reference
load is greater than 2 %. Adaptive feed control is not
possible for smaller values.