FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

PROGRAMMING
8. COORDINATE SYSTEM
B–62764EN/01
116
X
X
YY
A
160
100
100
100
200
If G92X100Y100; is commanded when the tool
is positioned at (200, 160) in G54 mode, work-
piece coordinate system 1 (X’ – Y’) shifted by
vector A is created.
60
G54 workpiece coordinate system
Tool position
New workpiece coordinate system
Original workpiece coordinate system
1200.0
Z
Z
X
X
600.0
600.0
1200.0
Z’
Z
X
X
X’ – Z’ New workpiece coordinate system
X – Z Original workpiece coordinate system
A : Offset value created by G92
B : Workpiece zero point offset value in theG54
C : Workpiece zero point offset value in the G55
A
B
C
A
G54 Workpiece
coordinate system
G55 Workpiece
coordinate system
Suppose that a G54 workpiece coordi-
nate system is specified. Then, a G55
workpiece coordinate system where
the black circle on the tool (figure at the
left) is at (600.0,12000.0) can be set
with the following command if the rela-
tive relationship between the G54 work-
piece coordinate system and G55
workpiece coordinate system is set cor-
rectly:G92X600.0Z1200.0;Also, sup-
pose that pallets are loaded at two dif-
ferent positions. If the relative relation-
ship of the coordinate systems of the
pallets at the two positions is correctly
set by handling the coordinate systems
as the G54 workpiece coordinate sys-
tem and G55 workpiece coordinate
system, a coordinate system shift with
G92 in one pallet causes the same
coordinate system shift in the other pal-
let. This means that workpieces on two
pallets can be machined with the same
program just by specifying G54 or G55.
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