Programming manual.
CNC 8070
PATH CONTROL.
8.
Circular interpolation (G02/G03).
·147·
(REF: 1709)
8.3.1 Cartesian coordinates (Arc center programming).
The arc is defined by programming function G02 or G03 followed by the coordinates of the
arc's end point and those of its center (referred to the starting point of the arc) according to
the axes of the active work plane.
Programming format.
The programming format is the following; the arguments appear between curly brackets and
the optional ones, between angle brackets.
G02/G03 <X..C{end_point}> <I..K{center}>
End point of the arc.
The end point is defined with its coordinates along the axes of the active work plane and may
be given in either absolute (G90) or incremental (G91) coordinates. If they are not
programmed or are the same as the starting point, a full circle will be executed.
Arc center referred to starting point.
The coordinates of the center are measured according to the starting point. The arc center
must be defined in cartesian coordinates by the letters "I", "J" or "K" depending on the active
plane. When one of the center coordinates is zero, it does not have to be programmed. These
coordinates are not affected by functions G90 and G91.
X..C{end_point} Optional. End point of the arc.
Units: Millimeters, inches or degrees.
I..K{center} Optional. Arc center referred to starting point.
Units: mm or inches.
G02 X50 Y0 I28 J13
Plane. Programming the center.
G17 G18 G19 Letters "I", "J" and "K" are associated with the first, second and third axis of the
channel respectively.
G17 (XY plane) G02/G03 X... Y... I... J...
G18 (ZX plane) G02/G03 X... Z... I... K...
G19 (YZ plane) G02/G03 R... Z... J... K...
G20 Letters "I", "J" and "K" are associated with the abscissa, ordinate and
perpendicular axes of the defined plane.
#FACE [X, C, Z]
#CYL [Z, C, X, R]
The active trihedron is formed by the axes defined in the activation instruction
of the C axis. The "I", "J", and "K" centers are associated with the axes in the same
order that they were defined when activating the C axis.
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