System information

SECTION FOUR - PREPARATORY FUNCTIONS (G CODES)
The block X2 Y6 is pulled in tangent to the arc. The cutter compensation has already taken into
consideration the previous two lines, and it has calculated the compensated point based on the
original line rather than the tangent line. The compensated path for this program will not cut the
correct part. To avoid this problem, you must verify the program with cutter compensation
off (or 0 tool radius). Note the actual tangent point (X4.8276, Y5.0690). Substitute this point for
the estimated point (X2 Y6).
This is not a problem for the other tangent line in the program.
Method IV
Describing an Arc Using Polar Definitions
The polar definitions do not change from absolute to incremental. The center of the arc is always
considered the pole and all angles are related to it. The basic polar definition is as follows.
G17 G2
G18 or AA_____ AB_____ R_____
G19 G3 start angle end angle radius
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