HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 413)

Basis Functions (Software Option 50) 14.2
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TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
413
14.2 Basis Functions (Software Option 50)
Switching between milling/turning mode of operation
The machine has to have been adapted by the
machine manufacturer for turning operations and
switching the mode of operation. Refer to your
machine manual.
To switch between milling and turning operations you must switch
to the specific mode.
You can switch these operating modes with the NC functions
FUNCTION MODE TURN and FUNCTION MODE MILL.
The TNC shows a symbol in the status display when the turning
mode is active
Mode of operation Symbol
Turning mode active: FUNCTION MODE TURN
Milling mode active: FUNCTION MODE MILL No symbol
When the modes of operation are switched between, the TNC
executes a macro that defines the machine-specific settings for the
specific mode of operation.
The preset must be in the center of the turning
spindle in turning mode.
The position of the tool tip must be aligned to
the center of the turning spindle. Position the Y
coordinates in Turning mode to the center of the
turning spindle.
Check the orientation of the tool spindle. The tool tip
must be aligned to the center of the turning spindle
for outside machining. The tool tip must be aligned
opposite to the center of the turning spindle for
inside machining.
Check whether the rotation direction of the turning
spindle is correct for the loaded tool.
If you process heavy workpieces with high speeds
then high physical forces occur. Ensure that the
workpiece is firmly clamped to avoid accidents or
machine damage.