HEIDENHAIN TNC 640 (34059x-05) ISO programming - Manual (Page 245)

Path contours – FK free contour programming 6.6
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TNC 640 | User's ManualDIN/ISO Programming | 1/2015
245
Input options
End point coordinates
Soft keys Known data
Cartesian coordinates X and Y
Polar coordinates referenced to FPOL
Example NC blocks
N70 FPOL X+20 Y+30
N80 FL IX+10 Y+20 G42 F100
N90 FCT PR+15 IPA+30 DR+ R15
Direction and length of contour elements
Soft keys Known data
Length of a straight line
Gradient angle of a straight line
Chord length LEN of an arc
Gradient angle AN of an entry tangent
Center angle of an arc
Caution: Danger to the workpiece and tool!
Gradient angles that you defined incrementally ( IAN)
are referenced to the direction of the last positioning
block by the TNC. Programs that contain incremental
gradient angles and were created on an iTNC 530 or
on earlier TNCs are not compatible.
Example NC blocks
N20 FLT X+25 LEN 12.5 AN+35 G41 F200
N30 FC DR+ R6 LEN 10 AN-45
N40 FCT DR- R15 LEN 15