HEIDENHAIN TNC 370 User Manual page 136

5 Programming Tool Movements
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5.6 Path Contours - FK Free Contour Programming
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Initiating FK contour programming
You can program free contour elements with the following soft keys:
Cantour element Soft key
Straight line with tangential connection FLT
lFLT\
Straight line without tangential connection FL
Circular arc with tangential connection FCT
Circular arc without tangential connection FC
FPOL defines the pole for FK polar coordinates.
FPOL is set with Cartesian coordinates and remains effective until it is
redefined.
Pole for programming FK polar coordinates FPOL
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TNC 370 5-37