PROGRAMMING7. COORDINATE SYSTEM
B–64124EN/01
90
X
XȀ
YȀY
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
Ȁ
X
600.0
600.0
1200.0
Z’
ZȀ
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 (600.0,1200.0) can be set with
the following command if the relative
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.
Examples