HEIDENHAIN TNC 640, User Manual, Page: 311 / 948

Programming Contours | Path contours – Polar coordinates
7
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
311
Datum for polar coordinates: pole CC
You can set the pole CC at any point in the machining program,
before indicating points in polar coordinates. Set the pole in the
same way as you would program the circle center.
Coordinates
: Enter Cartesian coordinates for the
pole or, if you want to use the last programmed
position, do not enter any coordinates. Before
programming polar coordinates, define the
pole. You can only define the pole in Cartesian
coordinates. The pole remains in effect until you
define a new pole.
Example
12 CC X+45 Y+25
Straight line LP
The tool moves in a straight line from its current position to the
straight-line end point. The starting point is the end point of the
preceding block.
Polar coordinate radius PR
: Enter the distance
from the pole CC to the straight-line end point.
Polar coordinate angle PA
: Angular position of
the straight-line end point between –360° and
+360°
The sign of
PA
depends on the angle reference axis:
If the angle from the angle reference axis to
PR
is
counterclockwise:
PA
>0
If the angle from the angle reference axis to
PR
is clockwise:
PA
<0
Example
12 CC X+45 Y+25
13 LP PR+30 PA+0 RR F300 M3
14 LP PA+60
15 LP IPA+60
16 LP PA+180