Turning Circles And Arcs (G02/G03) - Siemens SINUMERIK User Manual

For more information, see Sections "Tool radius compensation OFF: G40 (Page 121)" and "Selecting the tool radius
compensation: G41, G42 (Page 118)".
7.2.3.6

Turning circles and arcs (G02/G03)

The following gives an example of machining arc with specified program code:
N10 G18 G90 G500 G71
N20 T1 D1
N30 S5000 M3 G95 F0.3
N40 G00 X0 Z2
N50 G01 Z0
N60 G42 X50
N70 G00 X300 Z500
N80 G03 X75 Z-35 I-12 K-35
N90 G01 Z-130
N100 G40 X120 Z-140
* Note that N80 block as above can also be written as "N80 G03 X75 Z-35 CR=37".
When turning circles and arcs, you must define the circle center point and the distance between the start point, end point,
and the center point in the relative coordinate system.
When using the XZ coordinate system, the interpolation parameters I and K are available.
There are two common ways of defining circles and arcs:
● G02/G03 X... Z... I... K...
● G02/G03 X... Z... CR=...
Use positive value in CR with arcs ≤ 180°, and negative value with arcs > 180°.
SP Start point of circle
CP Center point of circle
EP End point of circle
I Incremental distance from SP to CP in X axis
K Incremental distance from SP to CP in Z axis
G2 Traversing direction of the circle (clockwise)
G3 Traversing direction of the circle (counter-clockwise)
For more information, see Section "Circular interpolation: G2, G3 (Page 87)".
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Programming and Operating Manual (Turning)
01/2017