Rotation Of Work Coordinate - YASKAWA yasnac i80m Instruction Manual

2.7
COORDINATE SYSTEM (Cont'd)
*
A"
GS4
ROTATION
COORDINATE
SYSTEM
lj'i4
A
\
O.'.-IR
G54
WORK
COORDINATE
SYSTEM
SHIF T Y
C.SC- REFERENCE
COORDINATE
SYSTEM
C54 WORK COORDINATE SYSTEM SHIFT X
Fig. 2.7.8 Rotation of Work Coordinate
System
NOTE
O
When coordinate rotation is performed by G54 command, the G2S G30
command performs
rotation
at
an
intermediate positioning point, but does
not
perform coordinate rotation
at
the
reference point. G53 does
not
perform coordinate rotation either.
©
The plane of
coordinate rotation for this specification is fixed
to
the G 17
plane.
©
For cancellation after coordinate rotation by the G54 command, clear the
shift quantity of
the work coordinate
system
being instructed or that
of
the
G52 command
to
0.
O
Combination with the mirror image, scaling, and coordinate rotation functions
The above G codes
must
be arranged in the specified order. Otherwise, alarm 285 occurs. Work
coordinate rotation
(G54)
»
Mirror image (M95)
)
Scaling (G51)
)
Coordinate rotation
(G68)
©
Reset during coordinate rotation by
G54
Intervention
to
coordinate rotation by resetting affects the programmed trajectory thereafter.
This is because of the following
two
specifications!
1) By resetting, the current position is fetched into NC as an NC- instruction position,
to set
it again.
2)
In coordinate
rotation, an
axis motion length is calculated from the NC instruction position
to
the
center
of rotation.
©
For
specifying rotating
coordinate
system, execute
both X-and Y-axis specifications
as
the
first
move
command of the
new
coordinate.
When only
one
axis is specified by
©
2). inadvertant
movement
is
sometimes performed.
-
90
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