HEIDENHAIN iTNC 530 (340 49x-03) Pilot - Manual (Page 31)

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FK Free Contour Programming
If the end point coordinates are not given in the workpiece drawing or if
the drawing gives dimensions that cannot be entered with the gray path
function keys, you can still program the part by using the “FK Free
Contour Programming.”
Possible data on a contour element:
„ Known coordinates of the end point
„ Auxiliary points on the contour element
„
Auxiliary points near the contour element
„ A reference to another contour element
„
Directional data (angle) / position data
„ Data regarding the course of the contour
To use FK programming properly:
„
All contour elements must lie in the working plane.
„ Enter all available data on each contour element.
„ If a program contains both FK and conventional blocks, the FK contour
must be fully defined before you can return to conventional
programming. Only then will the TNC allow you to enter conventional
path functions.
See “Programming Tool Movements—FK Free Contour
Programming.”