System information

SECTION FOUR - PREPARATORY FUNCTIONS (G CODES)
The above formats for helical milling illustrate the general concept. Any of the previous arc
formats can be used to do helical cutting by simply adding the third axis end point to the arc
command.
An F address specifies a feedrate along a circular arc. Therefore, the feedrate of the linear axis is
as follows.
Length of linear axis
F x ______________________
Length of circular arc
Determine the feedrate so the linear axis feedrate does not exceed any of the various limit values.
Dwell command (G04)
The G4 code must be immediately followed by an FXXX.X instruction. This instruction will
then cause the program to stop or dwell for XXX.X seconds.
General Format:
G4F2.5 will cause the program to dwell for 2.5 seconds.
G4F25 will cause the program to dwell for 25 seconds.
Note: A, P, or X can be used in place of F following the G4 command.
Exact stop (G09)
Moves commanded in blocks with G09 decelerate at the end point, and in-position check is
performed. This function is used when sharp edges are required for workpiece corners in cutting
feed.
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