FANUC Series 16/18/160/180-Model C for Lathe Operator Manual

PROGRAMMING
B–62754EN/01
8. COORDINATE SYSTEM
93
With the G10 command, each workpiece coordinate system can be
changed separately.
By specifying G50IP_;, a workpiece coordinate system (selected with a
code from G54 to G59) is shifted to set a new workpiece coordinate
system so that the current tool position matches the specified coordinates
(IP_).
If IP is an incremental command value, the work coordinate system is
defined so that the current tool position coincides with the result of adding
the specified incremental value to the coordinates of the previous tool
position.
Then, the amount of coordinate system shift is added to all the workpiece
zero point offset values. This means that all the workpiece coordinate
systems are shifted by the same amount.
XXȀ
A
160
100
100
100
200
If G50X100Z100; is commanded when the tool
is positioned at (200, 160) in G54 mode, work-
piece coordinate system 1 (X’ – Z’) shifted by
vector A is created.
60
G54 workpiece coordinate system
Tool position
New workpiece coordinate system
Original workpiece coordinate system
Z’
Z
X’ – Z’ New workpiece coordinate system
X – Z Original workpiece coordinate system
A : Offset value created by G50
B : Workpiece zero point offset value in G54
C : Workpiece zero point offset value in G55
<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
relative relationship between the G54
workpiece coordinate system and
G55 workpiece coordinate system is
set correctly:G50X600.0Z1200.0;Also,
suppose that pallets are loaded at two
different positions. If the relative rela-
tionship of the coordinate systems of
the pallets at the two positions is cor-
rectly set by handling the coordinate
systems as the G54 workpiece coordi-
nate system and G55 workpiece coor-
dinate system, a coordinate system
shift with G50 in one pallet causes the
same coordinate system shift in the
other pallet. This means that work-
pieces on two pallets can be ma-
chined with the same program just by
specifying G54 or G55.
Z
Z
X’
600.0
Z’
Z’
X
X
A
B
C
A
X’
1200.0
1200.0
600.0
Explanations
D Changing by G10
D Changing by G50
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