Fagor CNC 8070, Programming Manual, Page: 139 / 556

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Programming manual
CNC 8070
TOOL PAT
H
CONTROL
Ci
rc
ul
ar
i
n
te
rp
ol
a
ti
on
(G
02
/G
03)
6.
(S
OFT
V02.0
X
)
105
6.3.5 Arc center in absolute coordinates (G06/G261/G262)
When defining an arc, one may select whether the center position is
referred to the starting point of the arc or it is defined in absolute
coordinates.
Programming
This selection is made using the following functions:
G06 Arc center in absolute coordinates (not modal).
G261 Arc center in absolute coordinates (modal).
G262 Arc center referred to starting point.
G06-G261 Arc center in absolute coordinates
While one of these functions is active, the CNC interprets that the arc
center coordinates are referred to the active reference system origin
(part zero, polar origin, etc).
Function G261 stays active throughout the program whereas G06
only acts in the block where it has been programmed, therefore it can
only be added to a block where a circular interpolation has been
defined.
G262 Arc center referred to starting point
When this function is active, the CNC interprets that the coordinates
of the arc center are referred to the starting point of the arc.
G261
G90 G02 X50 Y10 I20 J30
G261
G91 G02 X0 Y-40 I20 J30
G90 G06 G02 X50 Y10 I20 J30
G91 G06 G02 X0 Y-40 I20 J30
The example shows 4 different ways to define an arc using absolute center
coordinates.
G262
G90 G02 X50 Y10 I-30 J-20
G262
G91 G02 X0 Y-40 I-30 J-20
The example shows two different ways to define an arc by indicating its
center with respect to the starting point of the arc.