HEIDENHAIN TNC 640, User Manual, Page: 707 / 948

Turning | Turning program functions (option 50)
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
707
M128
Alternately, you can use the
M128
function for simultaneous
turning
The following constraints apply for M128:
Only for NC programs programmed on the path of the tool
center.
Only for button turning tools with TO 9
The tool must be measured at the center of the tool-tip radius
Using a facing slide
Application
Refer to your machine manual.
This feature must be enabled and adapted by the
machine tool builder.
With a facing slide, also called boring head, you can perform almost
all turning operations with fewer different tools. The slide position
of the facing slide in the X direction can be programmed. On the
facing slide you mount, for example, a longitudinal turning tool that
you call with a TOOL CALL block.
Machining also works with a tilted working plane and on
workpieces that are not rotationally symmetric.
Please note while programming
The following constraints apply to the use of a facing slide:
Miscellaneous functions
M91
and
M92
cannot be used
Retraction with
M140
is not possible
TCPM
or
M128
are not possible
DCM
collision monitoring cannot be used
Cycles 800, 801 and 880 cannot be used
If you are using the facing slide in the tilted working plane, please
note the following:
The control calculates the tilted working plane as in milling
mode. The
COORD ROT
and
TABLE ROT
functions, as well as
SEQ
refer to the XY plane.
HEIDENHAIN recommends using the
TURN
positioning
behavior. The
MOVE
positioning behavior is not the best option
in combination with the facing slide.