HEIDENHAIN TNC 620 Programming Station

Programming contours | Path contours – Polar coordinates
5
Circular path CP around pole CC
The polar coordinate radius PR is also the radius of the arc. PR is
defined by the distance from the starting point to the pole CC. The
last programmed tool position will be the starting point of the arc.
Polar-coordinates angle PA: Angular position
of the arc end point between –99999.9999° and
+99999.9999°
Direction of rotation DR
18 LP PR+20 PA+0 RR F250 M3
19 CC X+25 Y+25
20 CP PA+180 DR+
With incremental entries you must use the same
algebraic sign for DR and PA.
Consider this behavior when importing NC programs
from earlier controls, and adapt the NC programs if
necessary.
Circle CTP with tangential connection
The tool moves on a circular path, starting tangentially from a
preceding contour element.
Polar coordinate radius PR: Distance between
the arc end point and the pole CC
Polar coordinate angle PA: Angular position of
the arc end point.
The pole is not the center of the contour circle!
12 L X+0 Y+35 RL F250 M3
13 CC X+40 Y+35
14 LP PR+25 PA+120
15 CTP PR+30 PA+30
16 L Y+0
170
HEIDENHAIN | TNC620 | Klartext Programming User's Manual | 01/2022