HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 414)

Programming: Turning Operations
14.2 Basis Functions (Software Option 50)
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TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
In Turning mode, diameter values are displayed on
the X axis position display. The TNC then shows a
diameter symbol on the position display.
In Turning mode, the spindle potentiometer is
effective on the turning spindle (rotary table).
Switching mode is not possible if "Tilting the working
plane" or TCPM is active.
In Turning mode, no coordinate conversions are
permitted except for the datum shift cycle.
You can also use the smartSelect function for
defining the turning functions, See "Overview of
special functions".
Entering the operation mode:
Show the soft-key row with special functions
Select the menu for TURNING PROGRAM
FUNCTIONS
Select
BASIC FUNCTIONS
Select FUNCTION MODE
Select the function for Turning or Milling mode
NC syntax
11 FUNCTION MODE TURN; ACTIVATE TURNING MODE
12 FUNCTION MODE MILL; ACTIVATE MILLING MODE