Siemens SINUMERIK 802D sl Programming Manual page 138

Enhanced Level Commands
4.6 Polar coordinate interpolation (G12.1, G13.1)
are dependent on the first axis in the plane (linear axis).
-- I and J in the Xp--Yp plane whenever the linear axis is the X axis
or, alternatively, an axis parallel to the X axis.
-- J and K in the Yp--Zp plane whenever the linear axis is the Y axis
or, alternatively, an axis parallel to the Y axis.
-- K and I in the Zp--Xp plane whenever the linear axis is the Z axis
or, alternatively, an axis parallel to the Z axis.
Address R can also be used to specify the radius of an arc.
Example
X axis (linear axis), C axis (rotary axis)
Fig. 4-22
N010 T0101;
N0100 G90 G00 X60.0 C0 Z..;
N0200 G12.1;
N0201 G42 G01 X20.0 F1000;
N0202 C10.0;
N0203 G03 X10.0 C20.0 R10.0
N0204 G01 X-20.0;
N0205 C-10.0;
N0206 G03 X-10.0 C-20.0 I10.0 J0;
N0207 G01 X20.0;
N0208 C0;
N0209 G40 X60.0;
N0210 G13.1;
N0300 Z..;
N0400 X.. C..;
N0900 M30;
4-138
SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) -- 04.07 Edition
N205
N206
Example of polar coordinate interpolation
Polar coordinate interpolation ON
Polar coordinate interpolation OFF
Rotary axis C
N204
N203
N202 N201
N208
N207
© Siemens AG 2007 All rights reserved
04.07
N200
X axis
Z axis