HEIDENHAIN ITNC 530 - 6-2010 DIN-ISO PROGRAMMING, User Manual

Page: 210 / 618

210 Programming: Programming Contours
6.5 P
a
th Cont
ours—P
o
lar Coor
dinat
e
s
Zero point for polar coordinates: pole I, J
You can define the pole CC anywhere in the part program before
blocks containing polar coordinates. Set the pole in the same way as
you would program the circle center.
U
Coordinates : Enter Cartesian coordinates for the pole
or, if you want to use the last programmed position,
enter
G29 . 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 NC blocks
Straight line at rapid traverse G10
Straight line with feed rate G11 F
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.
U
Polar coordinate radius R
: Enter the distance from
the pole CC to the straight-line end point
U
Polar coordinate angle H
: Angular position of the
straight-line end point between –360° and +360°
The sign of H depends on the angle reference axis:
„
If the angle from the angle reference axis to
R
is counterclockwise:
H >0
„
If the angle from the angle reference axis to R is clockwise: H <0
Example NC blocks
X
Y
X=I
Y=J
N120 I+45 J+45 *
X
Y
45
25
60°
60°
30
CC
N120 I+45 J+45 *
N130 G11 G42 R+30 H+0 F300 M3 *
N140 H+60 *
N150 G91 H+60 *
N160 G90 H+180 *
11