Brother International BAS-342E Instruction Manual - English - Page 61

Troubleshooting

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15. Troubleshooting 15. Troubleshooting Problem Cause Check Remedy Page Presser does not rise. Work clamp operation is sluggish. Presser lifter air tube is bent or damaged. Sliding part of the work clamp lubrication Presser lifter air tube Grease the sliding part of the work clamp. Straighten the bend in the tube or replace the tube. Presser does not drop. Work clamp operation is sluggish. Presser lifter air tube is bent or damaged. Sliding part of the work clamp lubrication Presser lifter air tube Grease the sliding part of the work clamp. Straighten the bend in the tube or replace the tube. Presser lift amount is incorrect. Incorrect position of presser arm lever F. Distance between work clamp and top of needle plate Adjust the work clamp lift amount. 37 Solenoid-type work clamp lifts up without clamping the material. Work clamp pressure is too light. Check the setting of the memory switch (memo-35). Increase the setting value of the memory 49 switch (memo-35). Thread wiper does not operate correctly. The thread wiper is obstructing the needle. Thread wiper position is incorrect. Clearance between thread wiper and needle tip - Thread wiper position Adjust the height of the thread wiper. 38 Adjust the operating distance of the thread 38 wiper. Lower thread winds to one side. Bobbin winder thread tension stud height is incorrect. Bobbin winder thread tension stud height Adjust the height of the thread tension stud. 11 Lower thread winding amount is incorrect. Bobbin presser position is incorrect. Thread winding amount Adjust the position of the bobbin presser. 11 Thread slips out of the needle. Stitches being skipped at the sewing start. Uneven upper thread length. Position of shuttle race thread guide is incorrect Refer to "Skipped stitches occur". Upper thread length Position of shuttle race thread guide Refer to "Skipped stitches occur". Adjust the sub-tension. 12 Adjust the position of the 33 shuttle race thread guide BAS-341E • 342E 54

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15.
Troubleshooting
15.
Troubleshooting
Problem
Presser
does
not
rise.
Presser
does
not
drop.
Presser
lift
amount
is
incorrect.
Solenoid
-type
work
clamp
lifts
up
without
clamping
the
material.
Thread
wiper
does
not
operate
correctly.
Lower
thread
winds
to
one
side.
Lower
thread
winding
amount
is
incorrect.
Thread
slips
out
of
the
needle.
Cause
Work
clamp
operation
is
sluggish.
Presser
lifter
air
tube
is
bent
or
damaged.
Work
clamp
operation
is
sluggish.
Presser
lifter
air
tube
is
bent
or
damaged.
Incorrect
position
of
presser
arm
lever
F.
Work
clamp
pressure
is
too
light.
The
thread
wiper
is
obstructing
the
needle.
Thread
wiper
position
is
incorrect.
Bobbin
winder
thread
tension
stud
height
is
incorrect.
Bobbin
presser
position
is
incorrect.
Stitches
being
skipped
at
the
sewing
start.
Uneven
upper
thread
length.
Position
of
shuttle
race
thread
guide
is
incorrect
Check
Sliding
part
of
the
work
clamp
lubrication
Presser
lifter
air
tube
Sliding
part
of
the
work
clamp
lubrication
Presser
lifter
air
tube
Distance
between
work
clamp
and
top
of
needle
plate
Check
the
setting
of
the
memory
switch
(memo
-35).
Clearance
between
thread
wiper
and
needle
tip
—
Thread
wiper
position
Bobbin
winder
thread
tension
stud
height
Thread
winding
amount
Refer
to
"Skipped
stitches
occur".
Upper
thread
length
Position
of
shuttle
race
thread
guide
Remedy
Page
Grease
the
sliding
part
of
the
work
clamp.
Straighten
the
bend
in
the
tube
or
replace
the
tube.
Grease
the
sliding
part
of
the
work
clamp.
Straighten
the
bend
in
the
tube
or
replace
the
tube.
Adjust
the
work
clamp
lift
amount.
37
Increase
the
setting
value
of
the
memory
switch
(memo
-35).
49
Adjust
the
height
of
the
thread
wiper.
38
Adjust
the
operating
distance
of
the
thread
wiper.
38
Adjust
the
height
of
the
thread
tension
stud.
11
Adjust
the
position
of
the
bobbin
presser.
11
Refer
to
"Skipped
stitches
occur".
Adjust
the
sub
-tension.
12
Adjust
the
position
of
the
shuttle
race
thread
guide
33
54
BAS
-341
E
•
342E