HEIDENHAIN TNC 426 (280 476) Pilot - Manual (Page 24)

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FK Free Contour Programming
FK Free Contour Programming
See “Programming Tool Movements – 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.
These dimensions can be programmed with FK