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Circle center i, j – HEIDENHAIN TNC 620 (73498x-02) ISO programming User Manual

Page 188

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Programming: Programming contours

6.4

Path contours - Cartesian coordinates

6

188

TNC 620 | User's Manual for DIN/ISO Programming | 5/2013

Circle center I, J

You can define a circle center for circles that you have programmed
with the

G02, G03 or G05 function. This is done in the following

ways:

Entering the Cartesian coordinates of the circle center in the
working plane, or

Using the circle center defined in an earlier block, or

Capturing the coordinates with the ACTUAL-POSITION-
CAPTURE key

To program the circle center, press the SPEC FCT
key

Press the PROGRAM FUNCTIONS soft key

Press the DIN/ISO soft key

Press the I or J soft key

Enter coordinates for the circle center or, if you
want to use the last programmed position,

G29

coordinates

Example NC blocks

N50 I+25 J+25 *

or

N10 G00 G40 X+25 Y+25 *
N20 G29 *

The program blocks 10 and 11 do not refer to the illustration.

Validity

The circle center definition remains in effect until a new circle
center is programmed.

Entering the circle center incrementally

If you enter the circle center with incremental coordinates, you
have programmed it relative to the last programmed position of the
tool.

The only effect of CC is to define a position as circle
center: The tool does not move to this position.

The circle center is also the pole for polar
coordinates.