HEIDENHAIN TNC 620 (81760x-01) - Manual (Page 226)

Programming: Programming contours
6.6 Path contours – FK free contour programming (Advanced
Programming Features software option)
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TNC 620 | User's Manual
HEIDENHAIN Conversational Programming | 3/2014
Input options
End point coordinates
Known data Soft keys
Cartesian coordinates X and Y
Polar coordinates referenced to FPOL
Example NC blocks
7 FPOL X+20 Y+30
8 FL IX+10 Y+20 RR F100
9 FCT PR+15 IPA+30 DR+ R15
Direction and length of contour elements
Known data Soft keys
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
27 FLT X+25 LEN 12.5 AN+35 RL F200
28 FC DR+ R6 LEN 10 AN-45
29 FCT DR- R15 LEN 15