Fagor 8055 M - Arc Defined by Three Points (G09)

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Programming manual
CNC 8055
CNC 8055i
6.
PATH CONTROL
·M· & ·EN· MODELS
SOFT: V02.2X
Arc defined by three points (G09)
6.6 Arc defined by three points (G09)
Through function G09 you can define an arc by programming the endpoint and an intermediate point
(the starting point of the arc is the starting point of the movement). In other words, instead of
programming the coordinates of the center, you program any intermediate point.
The endpoint of the arc is defined in Cartesian or polar coordinates, and the intermediate point is
always defined in Cartesian coordinates by the letters I,J, or K, each one being associated to the
axes as follows:
In Cartesian coordinates:
Polar coordinates:
Example:
Being initial point X-50 Y0.
G09 X35 Y20 I-15 J25
Function G09 is not modal, so it should always be programmed if you wish to execute an arc defined
by three points. Function G09 can be programmed as G9.
When G09 is programmed it is not necessary to program the direction of movement (G02 or G03).
Function G09 does not alter the history of the program. The same G01, G02 or G03 function stays
active after finishing the block.
Axes X, U, A ==> I
Axes Y, V, B ==> J
Axes Z, W, C ==> K
G17 G09 X±5.5 Y±5.5 I±5.5 J±5.5
G17 G09 R±5.5 Q±5.5 I±5.5 J±5.5
Function G09 may not be used to programmed a full circle because all three points must be different.
The CNC displays the corresponding error code.