Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 618)

L-force | PLC Designer
General Editors
616 DMS 4.1 EN 03/2011 TD29
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Example for a semi-circle:
N10 G1 X100 Y100 F100
N20 G2 X200 Y100 R50
If a circular arc with an opening angle >180° is desired, that must be defined via (I/J/K).
This method is unique, except for the case that start- and endpoint of the circle are
identical. There either a null- or a full-circle could rise. In this case the system will insert
a full-circle.
Center method
Also, when using the(I/J/K)-method, regard that it is decisive whether the I/J/K
(G98/G99) are given relatively or absolutely. If I and J are not given correctly (the
distance between the center and start resp. end point must be identical), then no
circular arc is possible and the system will replace it by a line.
Example for the same semi-circle (as shown above), specified via the relative center:
G-Code
N10 G1 X100 Y100 F100
N15 G99
N20 G2 X200 Y100 I50 J0
Example for the same semi circle (as shown above), specified via the absolute center:
N10 G1 X100 Y100 F100
N15 G98
N15 G98
N20 G2 X200 Y100 I150 J100