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Chapter 3 G Commands
99
Ⅰ
Programming
In N3 block, a local coordinate system is created according to G55 workpiece coordinate system,
and it is cancelled in the block N7.
3.20 Workpiece Coordinate System G54
~
G59
Command format
:
G54 workpiece coordinate system 1
G55 workpiece coordinate system 2
G56 workpiece coordinate system 3
G57 workpiece coordinate system 4
G58 workpiece coordinate system 5
G59 workpiece coordinate system 6
Command function:
one of G54
~
G59 is specified, one of workpiece coordinate system 1
~
6 is
selected. After a workpiece coordinate system is specified, the specified
point is in the specified workpiece coordinate system till a new workpiece
coordinate system is set.
Explanation:
G54
~
G59 are modal.
In the system, each coordinate system should correspond to ZOFS1~ ZOFS6 of zero offset
value of one workpiece coordinate system, relation between ZOFS1~ ZOFS6 and previous
workpiece is shown below:
When
№
11.7
(
APRS
)
is set to 1, an absolute coordinate system is set after machine zero return,
and then EXOFS and ZOFSn setting values are offset. Current workpiece coordinate setting after
zero return is shown: new workpiece coordinates=current absolute coordinates-
(
ZOFSn + EXOFS
)
.
G54
~
G59 workpiece coordinate system switch
Specifying G54~G59 can switch 6 workpiece coordinate systems to make the system work in
EXOFS
:
external workpiece coordinate zero
(
it is added to zero offset value of each workpiece
coordinate system, its value is a part of tool compensation->setting in the workpiece coordinate
system
)
ZOFSn
:
zero offset value of each workpiece coordinate system ZOFS1
~
ZOFS6
(
its value is a
part of tool compensation->setting in the workpiece coordinate system
)
Workpiece
coordinate
system 1 G54
Workpiece
coordinate
system 2 G55
Workpiece
coordinate
system 3 G56
Workpiece
coordinate
system 4 G57
Workpiece
coordinate
system 5
G58
Workpiece
coordinate
system 6 G59
EXOFS
ZOFS1
ZOFS2
ZOFS3
ZOFS4
ZOFS5
ZOFS6
Absolute coordinate at machine zero