HEIDENHAIN TNC 370 User Manual page 143

5
Programming Tool Movements
5.6 Path Contours - FK Free Contour Programming
Free programming of circular arcs
Center of free-programmed circles
The TNC calculates a circle center for free-programmed arcs (FC and
FCT blocks). This makes is possible to program full circles in an FK
program block.
A circle center that was previously entered or calculated is then no longer
valid.
If, for example, you enter conventional polar coordinates that refer to a
pole from a CC block preceding an FC or FCT block, then you must enter
the pole again.
4
d
--,
input procedures and soft keys not described here have the mne functions as fw straight lines.
Direct input for an arc or arc end point
Rotational direction of the arc
ROTATION CLOCKWISE: DR- ?
-
Radius of the arc CIRCLE RADIUS ?
Angle of leading axis to arc
end point
ANGLE FOR CIRCLE END POINT ?
Data on a circle center
Known data Dielag S&t key
X coordinate of the
circle center
CIRCLE CENTER X COORDINATE ?
r-
cc)( \
+I/
Y coordinate of the
circle center
CIRCLE CENTER Y COORDINATE ?
Polar coordinate radius
of the circle center
CIRCLE CENTER POLAR RADIUS ?
Polar coordinate angle
of the circle center
CIRCLE CENTER POLAR ANGLE ?
5-44 TNC 370 -