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2.7
COORDINATE SYSTEM
(Cont'd)
(3)
Return
to
reference coordinate
system
(G52)
[G52-1
With the above command, it is possible
to
cancel the
currently
selected
work
coordinate
system
and
return
to
the reference
coordinate
system.
<S>
The
G52 command is
a
modal command.
<0)-
If the work coordinate
system
shift
quantity is
changed after
G54
to
G59
is executed and
a work
coordinate
system
is selected, whether
or
not
that shift
quantity immediately
becomes valid for
operation
(withoutG54toG59commands)is
determined
by a
parameter
(pm4012D0).
>?> To
change
a
coordinate
system
by
G54
to
G59
command, create
a
program
so that
a new
coordinate
system
is entered in the G90 mode
and then
return to
the reference cordinate
system
in the G90 mode.
<§>
Even
if G54
to
G59
is
instructed while tool
length
offset
or
tool
position
offset is applied, the corrected quantity is
not
canceled. It
is usually
necessary to
instruct
G54
to
G50 after
canceling
the tool
length
offset
or tool position
offset.
WORK COORDINATE
SYSTEM POSITION
Z100.
(143
ZO
HOI :
G54
;
WORK COORDINATE
SYSTEM
POSITION
Z1100.
G90 Z1000.
Actual Z-axis
movement
quantity
becomes
1400.
G54 shift quantity Z
=
-300.
Offset HOI = 100.
Do
not
normally
use G92 in
G54
to
G59.
If G92 is instructed
during
execution in
a
coordinate
system set
by
G54
to
G59,
G54
to
G59 and reference coordinate
system
are
shifted
so
that the
current
position becomes the position
instructed
by G92.
tfo> Be
sure to
instruct
G54
to
G59
in
the G00
or
G01 mode.
Command in
any
other mode results in alarm "322."
ffl) Temporary
movement
in machine
coordinate
system (G53)
A
temporary movement
on the
machine coordinate
system
can be
instructed
by using G53 command. G53 is
a
non-modal
G
code.
(Program example)
I
G53
(G90)
GOO
X
Y
jj
(o
1
Commanding
J2
or
above
in Option 1.
J10
or
above
in Option
2,
or
J28
or
above
in Op¬
tion 3 results
in an
alarm.
-
80
-
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