YASKAWA YASNAC 3000G

3.
Measuring
of
compensation
amount
4.10
LEADSCREW
ERROR
COMPENSATION
f
A
description
of
the
method
of
measuring
compensation
values
for
X
axis
is
given
be¬
low.
For the
other
axes,
the
same
procedure
should
be
taken.
Errors
in
leadscrew
pitch
can
be
compensated
by
using
this
option
which
provides
storage
for
the
compensation
data.
For
this
operation,
the
con¬
trol
must
be
provided
with
the
return
to
refer¬
ence
zero
option.
A.
Determine
the
value
of
compensation
inter¬
val
by dividing
the
effective
stroke
of
X
axis
into
twenty
equal
parts.
(The
effective
stroke
of
X
axis is
determined
with
the
po¬
sitions
of
overtravel
limit
switches
on
the
negative
and
positive
direction
end
of
X
axis.
1.
Storage
for
leadscrew
error
compensation
20
Sets
of
parameters
(parameter
No.
10
to
No.
29)
are
available
for
storing
the
compen¬
sation
values.
Since
these
parameters
can
be
designated
with
the
axis,
the
compensa¬
tion
values
corresponding
to
20
points
for
each
axis
can
be
stored.
Return
the
machine
to
reference
zero
point
by
manual
operation.
B.
C.
Compensation
points
can
be
determined both
in
negative
and
positive
directions
with
the
interval
of
1/2Pl,
PL,
PL
•--
-
Address
No.
Meanings
X
Y
10
Assign
"10"
to
the
extreme
end
of
compen-
sation
points
in
the
negative
direction
of
X
axis
and
number
the
remaining
points
from
11
to
29
to
the
positive
direction
of
X
axis.
That
is,
for
simplification,
this
compen¬
sation
point
numbers
are
corresponded
to
the
parameter
numbers
for
storing
the
com¬
pensation
values.
D.
Z
a
X
Y
-
Comepnsation
values.
11
Z
a
E.
Move
the machine
by
MDI
operation
by
PL
intervals
and
measure
the
absolute
error
values
at
each
compensation position
using
RASER
measuring
devices
.
X
Y
29
Z
a
Arrange
the
measured
values
so
that
the
error
at
the
reference
zero
point
is
to
be
(Refer
to
Fig.
4.10.2.)
F.
Fig.
4.
10.
t
zero.
2.
Compensation
values
NOTES:
Table
4.
10.
1
shows the
meaning
of
the
con¬
tents
of
parameter
No.
10
to
No.
29.
-
Reference
zero
point
must
be
located
between
the
compensation
points
No.
10
and
No.
29.
•
The
difference
between
two
adjacent
compen¬
sation
points
(e.g.
increment
values)
must
be
less
than
plus
or
minus
7.
Table
4.10.1
Compensation
Values
"1"
=
0.001
mm
Unit
0
to
±133
Setting
Range
Absolute
value
of
error
Absolute
/Incremental
Difference
between
two
adjacent
compensa¬
tion
points
(e.
g.
increment
values)
must
be
less
than
plus
or
minus
7.
116
-