HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 223)

Processing DXF Files (Software Option) 7.1
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TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
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Element information
At the bottom left of the screen, the TNC shows how far the
reference point you haven chosen is located from the drawing
datum.
Selecting and saving a contour
You must use the touchpad on the TNC keyboard or a
mouse attached via the USB port in order to select a
contour.
If you are not using the contour program in the
operating mode, you must specify the machining
sequence when selecting the contour that it matches
the desired machining direction.
Select the first contour element such that approach
without collision is possible.
If the contour elements are very close to one
another, use the zoom function.