Initiating The Fk Dialog; Pole For Fk Programming - HEIDENHAIN TNC 640 User Manual

7

Initiating the FK dialog

If you press the gray FK path function key, the control displays the
soft keys you can use to initiate the FK dialog. Press the FK key a
second time to deselect the soft keys.
If you initiate the FK dialog with one of these soft keys, the control
shows additional soft-key rows that you can use for entering known
coordinates, directional data and data regarding the course of the
contour.
Soft key FK element
Straight line with tangential connection
Straight line without tangential connection
Circular arc with tangential connection
Circular arc without tangential connection

Pole for FK programming

Pole for FK programming
To display the soft keys for free contour
programming, press the FK key
To initiate the dialog for defining the pole, press
the FPOL soft key
The control displays the axis soft keys of the
active working plane.
Enter the pole coordinates using these soft keys
The pole for FK programming remains active until you
define a new one using FPOL.
316
Programming Contours | Path contours – FK free contour programming
HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017