YASKAWA YASNAC 3000G - Page 148

7.4
PREPARATION FOR
LEADSCREW
ERROR
COMPENSATION
AND
STROKE
CHECK
4
7.5
PREPARATION FOR
AUTOMATIC
OPERATION
The
machine
must
be
positioned
properly
accord¬
ing
to
the
part
program
prior
to
the
start
of
auto¬
matic
operation.
After
positioning
the
absolute
coordinate
system
for
the
machining
must
be
set
properly
by
manual
operation
or
programming.
1.
Return
to
reference
zero
The
control
with
Leadscrew
Error
Compen¬
sation
option
or
Stroke Check
option
requires
any
of
the
following
operations
for
returning
the
machine
to
the
reference
zero
point,
be¬
cause
the
data
for
operation
of
both
options
are
referenced
from
this
point.
a.
Return
the
tool
to
the
reference
zero
point
by
manual
operation.
(Refer
to
6.2.
1
MANUAL
ZERO
RETURN)
b.
Execute
"G91
G28
XO
YO
ZO
*"
in MDI
mode.
1.
When
G92
is
not
programmed
in
a
tape
or
memory.
•
Return
the
machine
manually
to
the
refer¬
ence zero
point.
(Refer
to
6.
2.
1
MANUAL
ZERO
RETURN
.
)
The
G92
command
according
to
the
part
pro¬
gram
should
be
executed
by
MDI.
G92
X-
• •
Y-
•
*
2.
Check
of
parameter
No.
03
or
No.
05
After
return
to
reference
zero,
when
the
contents
of
parameter
No.
03
are
"l,"
Stroke Check
is
in
effect.
when the
contents
of
parameter
No.
05
are
"
l,"
Leadscrew Error
Compensation
is
in
effect.
when
the
contents
of
each
parameter
are
"0,"
each
option
is
effect.
X
—
—I
REFERENCE
ZERO
~TT
Y
+X
ABSOLUTE
ZERO
POINT
(0,
0)
3.
Check of
parameter
No.
06
Fig.
7.
5.
1
When
the
contents
of
parameter
No.
06
are
"
1”
(Return
to
reference
zero
is
required
before
Cycle
Start),
if
the
CYCLE
START
button is
depressed
without
return
to
refer¬
ence
zero
after
power
on,
the
alarm
code
"23"
will
be
displayed.
(Alarm
code
"23":
Return
to
reference
zero
is
unready).
It
is
recommendable
to
set
the
contents
of
param¬
eter
No.
06
to
"l,"
when
the
control
is
pro¬
vided
with
Leadscrew Error
Compensation
option
or
Stroke
Check
option
because
these
options
require
return
to
reference
zero
point
before
operation.
(Leadscrew
Error
Compensation
will
not
be
performed
if
CY¬
CLE
START
button
is
depressed
without
return
to
reference
zero
when
the
contents
of
parameter
No.
06
are
"0"
even
if
the
con¬
tents
of
parameter
No.
05
are
"
l
."
The
same
can
be
said
for
the
Stroke
Check
option.
If
"G92
X0 Y0
Z0
*"
setting
is
required
the
coordinate
of
each axis
can
be
set
to
”0"
easily using
ORG
key.
Refer
to
4.
1
.
13
ORG
KEY.
EXAMPLE
EOR
*
N
1
GOO
X-
-
.
Y-
•
•
Z
•
•
*
Fig.
7.5.2
t-:
141
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