System information

SECTION FOUR - PREPARATORY FUNCTIONS (G CODES)
The polar format for arcs can be mixed with the Cartesian formats. The following are legal
formats.
G17 G2 X_____ Y_____ AA_____ R_____
end point start angle
G17 G2 AB_____ XC_____ YC_____ R_____
end angle center point
G17 G2 I_____ J_____ AB_____
center point
The above formats are written for the XY plane but are valid in any plane or direction. Trig Help
is only valid in polar when using an arc with valid center point and radius.
Program 1
The following programs will all produce the same part. The programming method used is totally
optional.
1. Absolute coordinates (Polar No Trig Help)
G90
G1 X0 Y0
X4.2929 Y4.2929
G3 R3 AA295.53 AB357.59
G2 R4 AA77.56 AB318.59
G1 Y0
X0
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