1234 HEIDENHAIN Technical Manual iTNC 530 HSCI
Initial learning and
controlling with
AFC
After you have entered the settings described above, proceed as follows to
carry out a learning phase for an NC program:
In the Program Run, Full Sequence operating mode, load the NC program
for which the learning procedure is to be carried out, e.g. <NC name.H.>
Activate AFC with the ADAPTIVE FEED CONTROL and FEED CONTROL ON soft
keys. This creates and displays the <NC name.H.AFC.DEP> table of control
settings.
Start the NC program.
The learning procedure is performed automatically for each individual
machining cut.
The spindle reference power determined with the teach-in cut until this time
is displayed in a pop-up window.
All control settings for the individual cuts of an NC program are saved as a
table in the <NC name>.H.AFC.DEP file (SETTINGS TABLE soft key), where they
are used for future machining.
The status of each cutting data block changes from L (learning) to C
(controlling) after a successful teach-in cut.
The data determined in the learning phase is saved in the <NC
name>.H.AFC2.DEP file (EVALUATION TABLE soft key).
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.
At any time during the teach-in cut, you can change the machining feed rate
with the feed-rate override potentiometer any way you want, and so
influence the ascertained reference load.
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 PREF RESET soft key enables you to reset the spindle reference power
determined by the teach-in cut until this moment, and to restart reference-
value determination.
You can teach any number of machining steps for a tool. A machining step
always starts with M3 or M4, and ends with M5. For machining steps in which
the tool remains the same, but it appears useful to define multiple cuts for
AFC, you can repeat the corresponding FN 17 function. A new cut is started
with each FN 17:SYSWRITE ID 622 NR0 IDX 0.0 =+1 and is ended with FN
17:SYSWRITE ID 622 NR0 IDX 0.0 =+0.
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