Fagor CNC 8070, Programming Manual

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Programming manual
CNC 8070
COORDI
NATE SYSTEM
Absol
u
te
(
G
90)
or
i
n
c
rem
en
ta
l
(G
91)
c
oor
di
nat
e
s
3.
(S
OFT
V02.0
X
)
35
3.3 Absolute (G90) or incremental (G91) coordinates
The coordinates of the various points may be defined in absolute
coordinates (referred to the active origin point) or incremental
coordinates (referred to the current position). The type of coordinates
may be selected by program using the following functions:
G90 Programming in absolute coordinates.
G91 Programming in incremental coordinates.
Both functions may be programmed anywhere in the program; they do
not have to go alone in the block.
Operation
After executing one of these functions, the CNC assumes that
programming mode for the following blocks. If none of these functions
is programmed, the CNC uses the work mode selected by machine
manufacturer [G.M.P. "ISYSTEM"].
Depending on the active work mode (G90/G91), the coordinates of the
points are defined as follows:
• When programming in absolute coordinates (G90), the
coordinates of the point are referred to the current origin of the
coordinate system, usually the part zero.
• When programming in incremental coordinates (G91), the
coordinates of the point are referred to the current tool position.
The preceding sign indicates the direction of the movement.
N10 G00 G71 G90 X0 Y0
N20 G01 X35 Y55 F450
N30 X75 Y25
N40 X0 Y0
N50 M30
Programming in absolute coordinates.
N10 G00 G71 G90 X0 Y0
N20 G01 G91 X35 Y55 F450
N30 X40 Y-30
N40 X-75 Y-25
N50 M30
Programming in incremental coordinates.