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Path contours – fk free contour programming 6.6 – HEIDENHAIN TNC 320 (34055x-06) User Manual

Page 209

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Path contours – FK free contour programming

6.6

6

TNC 320 | User's Manual HEIDENHAIN Conversational Programming | 5/2013

209

Circle center CC, radius and direction of rotation in the FC/FCT
block

The TNC calculates a circle center for free-programmed arcs from
the data you enter. This makes it possible to program full circles in
an FK program block.

If you wish to define the circle center in polar coordinates you must
use FPOL, not CC, to define the pole. FPOL is entered in Cartesian
coordinates and remains in effect until the control encounters a
block in which another FPOL is defined.

A circle center that was calculated or programmed
conventionally is then no longer valid as a pole or
circle center for the new FK contour: If you enter
conventional polar coordinates that refer to a pole
from a CC block you have defined previously, then
you must enter the pole again in a CC block after the
FK contour.

Known data

Soft keys

Circle center in Cartesian coordinates

Center point in polar coordinates

Rotational direction of the arc

Radius of an arc

Example NC blocks

10 FC CCX+20 CCY+15 DR+ R15
11 FPOL X+20 Y+15
12 FL AN+40
13 FC DR+ R15 CCPR+35 CCPA+40