Programming manual
CNC 8070
TOOL PATH CONTROL
Arc defined by three points (G09)
6.
(SOFT V02.0X)
109
6.5 Arc defined by three points (G09)
G09 may be used to define an arc by programming the end point and
an intermediate point (the initial point of the arc is the starting point
of the move). In other words, instead of programming the center
coordinates, any intermediate point is programmed.
Coordinates of the end point
It may defined in cartesian or polar coordinates both absolute and
incremental.
Coordinates of the intermediate point
It must be defined in cartesian coordinates by the letters "I", "J" or "K"
depending on the active plane.
These coordinates are affected by functions G90 and G91.
The programming format depends on the active work plane. In the XY
plane is:
Programming G09 does not require programming the direction of the
movement (G02 or G03).
G17 G18 G19 Letters "I", "J" and "K" are associated with the X, Y
and Z axes respectively.
G20 Letters "I" and "J" are associated with the abscissa
and ordinate axes of the defined plane.
XY plane (G17) G02/G03 X... Y... I... J...
G02/G03 R... Q... I... J...
Where X-50 Y0 is the starting point.
G09 X35 Y20 I-15 J25
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