HEIDENHAIN TNC 426 (280 476) Pilot - Manual (Page 25)

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FK Free Contour Programming
Standard colors of the interactive graphics
Fully defined contour element
The displayed element is one of a limited number of
possible solutions
The element is one of an infinite number of solutions
Contour element from a subprogram
Working with the Interactive Graphics
Select the PGM+GRAPHICS screen layout!
The interactive graphics show the contour as you are programming it.
If the data you enter can apply to more than one solution, the following
soft keys will appear:
To show the possible solutions
To enter the displayed solution in the part program
To enter data for subsequent contour elements
To graphically display the next programmed block