HEIDENHAIN TNC 640, User Manual, Page: 711 / 948

Turning | Turning program functions (option 50)
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
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Cutting force monitoring with the AFC function
Refer to your machine manual.
This feature must be enabled and adapted by the
machine tool builder.
You can also use the
AFC
function (option 45) in turning mode and
thus monitor the complete machining process. In turning mode, the
control checks for tool wear and tool breakage.
For this purpose, the control uses the reference load
Pref
, the
minimum load
Pmin
and the maximum load
Pmax
.
Cutting force monitoring with
AFC
basically works like adaptive
feed control in milling mode. The control requires slightly different
data, which you provide via the table AFC.TAB.
Further information: "Application", page 536
Defining the AFC basic settings
The table AFC.TAB is valid for milling and turning mode. For turning
mode, you define your own monitoring settings (line in the table).
Enter the following data in the table:
Column Function
NR
Consecutive line number in table
AFC
Name of the monitoring setting. You enter this name
in the
AFC
column of the tool table. It specifies the
assignment to the tool.
FMIN
Feed rate at which the control is to perform an
overload reaction.
Input value in turning mode: 0 (not required in
turning mode)
FMAX
Maximum feed rate in the material up to which the
control can automatically increase the feed rate.
Input value in turning mode: 0 (not required in
turning mode)
FIDL
Feed rate for traverse when the tool is not cutting
(feed rate in the air).
Input value in turning mode: 0 (not required in
turning mode)
FENT
Feed rate at which the control is to traverse when
the tool enters or exits the material.
Input value in turning mode: 0 (not required in
turning mode)
OVLD
Desired reaction of the control to overload:
S
/
E
/
F
: Display error message on the screen
L
: Disable active tool
-
: No overload reaction
In turning mode it is not possible to insert replace-
ment tools. If you define the overload reaction
M
,
the control outputs an error message.
POUT
Entering the minimum load
Pmin
for tool breakage
monitoring