JUKI 6100 Technical Manual page 40

6.1.7 Carriage unit positioning
Obtain a print
sample
either
by running
self-test
or
by
running an appropriate
program from
a
system.
The
sample should print as
many
of the available
daisy
wheel
characters as
possible.
Check
the print
sample
for
character
cut-off, light
printing
and
for
any
noticeable
tilt
in
the print
line.
Character
cut-off
should be
more
evident
on
the
taller
characters
such
as
the
"1" and some
special
characters
(
|
(
(
[ ]
).
Print line
tilt
may
only be evident
on preprinted forms.
If
you
are satisfied
with
the quality of the print
sample then
you
need not proceed
with
the adjustments.
If
you
are
not
satisfied
with
the quality
of the print
sample
there are
two
items
you
should
check
before beginning the
adjustment proce-
dure.
1.
Be
sure
your
daisy
wheel
is
not
worn
or
does not have chipped
charac-
ters. 2.
Check
the
linear
motor
rail
and
carriage
frame adjustment (Page 34).
There
are
two adjustments
which
affect print quality,
Linear
motor
rail
height
and
the positioning of the
motor
rail
brackets.
The two
adjustments
are inter-
related
and
care
must
be taken
when
performing these adjustments.
A
brief
summary
of the
two
adjustments follows:
(1)
Linear
motor
rail
height:
Perform
this
adjustment to correct for small
amounts
of
tilt.
Linear
motor
rail
spacers
can be
inserted or
removed
bet-
ween
the
rail
and the
motor
bracket
to
compensate
for
tilt.
Performing
this
adjustment causes the daisy
wheel
character to
move up and
down
in rela-
tion to
the platen.
(2)
Motor
bracket:
Perform
this
adjustment to correct for large
amounts
of
tilt,
character cut-off or for light
printing
on one
or
both ends of the print
line.
The adjustment
is
done by loosening the
two motor
bracket setscrews
and turning the eccentric adjusting
nut to
compensate
for
tilt,
cut-off or
light
printing.
This
adjustment
causes the daisy
wheel character to
move
either
up and
away
from the platen or
down
and toward the
platen.
When
performing
this
adjustment, always
move
the eccentric adjusting
nut
in
small increments,
then obtain a print
sample before adjusting further.
Using
this
adjustment to
compensate
for
tilt
may
cause printing to
be
lighter
on
the
end being
adjusted.
Before proceeding with any adjustments,
check the
symptom/fix
list
on page 38
for the
problem you
are
experiencing,
then follow the
recommended
steps.
NOTE: When
experiencing
print quality
problems be sure to
check both the
left
and
right
motor
brackets for loose setscrews, this
problem
can cause
erratic print quality.
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37
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