Brother International BAS-342E Instruction Manual - English - Page 40

Adjusting, needle, clearance, driver, gurard, shuttle, thread, guide

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9-3. Adjusting the needle clearance 0.01 - 0.08mm 9. Standard adjutsments Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw 0 and turn the eccentric shaft 0 to adjust so that the clearance between the needle and the rotary hook is 0.01 - 0.08 mm. 9-4. Adjusting the driver needle gurard 6 Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw 0 and turn the eccentric shaft 0 to adjust so that the driver needle guard 0 contacts the needle. If the needle contact pressure is too great, skipped stitches may occur. On the other hand, if the driver needle guard 0 is not touching the needle, the tip of the inner rotary hook will obstruct the needle, resulting in an excessively high amount of friction. 9-5. Adjusting the shuttle race thread guide O O O The needle groove of the shuttle race thread guide 0 should be aligned with the center of the needle plate hole, and the needle center and the angled section ® should be aligned. NOTE If the shuttle race thread guide is in the wrong position, thread breakages, soiled thread or catching of the thread may occur. BAS-341E • 342E 33

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9.
Standard
adjutsments
9-3.
Adjusting
the
needle
clearance
0.01
-
0.08mm
Turn
the
machine
pulley
to
align
the
tip
of
the
rotary
hook
with
the
needle
center
line.
Then
loosen
the
set
screw
0
and
turn
the
eccentric
shaft
0
to
adjust
so
that
the
clearance
between
the
needle
and
the
rotary
hook
is
0.01
-
0.08
mm.
9-4.
Adjusting
the
driver
needle
gurard
Turn
the
machine
pulley
to
align
the
tip
of
the
rotary
hook
with
the
needle
center
line.
Then
loosen
the
set
screw
0
and
turn
the
eccentric
shaft
0
to
adjust
so
that
the
driver
needle
guard
0
contacts
the
needle.
If
the
needle
contact
pressure
is
too
great,
skipped
stitches
may
occur.
On
the
other
hand,
if
the
driver
needle
guard
0
is
not
touching
the
needle,
the
tip
of
the
inner
rotary
hook
will
obstruct
the
needle,
resulting
in
an
excessively
high
amount
of
friction.
9-5.
Adjusting
the
shuttle
race
thread
guide
O
O
O
The
needle
groove
of
the
shuttle
race
thread
guide
0
should
be
aligned
with
the
center
of
the
needle
plate
hole,
and
the
needle
center
and
the
angled
section
®
should
be
aligned.
NOTE
If
the
shuttle
race
thread
guide
is
in
the
wrong
position,
thread
breakages,
soiled
thread
or
catching
of
the
thread
may
occur.
BAS
-341
E
•
342E
33