Owner's Manual

14. Troubleshooting
54
BAS-343E
14. Troubleshooting
Check RemedyProblem Cause
Page
Auxiliary work clamp
does not rise.
Auxiliary work clamp
regulator setting
Insufficient air pressure
Adjust the air pressure.
6
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Presser lifter air tube
Presser lifter air tube is
bent or damaged.
Straighten the bend in
the tube or replace the
tube.
Auxiliary work clamp
does not drop.
Distance between
work clamp and top of
needle plate
Incorrect position of
presser arm lever F.
Presser lift amount is
incorrect.
37
Adjust the work clamp
lift amount.
Sliding part of the work
clamp lubrication
Work clamp operation is
sluggish.
Grease the sliding part
of the work clamp.
6
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Presser lifter air tube
Presser lifter air tube is
bent or damaged.
Straighten the bend in
the tube or replace the
tube.
Bobbin winder thread
tension stud height
Refer to "Skipped
stitches occur".
Thread wiper position
Clearance between
thread wiper and
needle tip
Thread wiper position
is incorrect.
Uneven upper thread
length.
The thread wiper is
obstructing the needle.
Bobbin winder thread
tension stud height is
incorrect.
Bobbin presser
position is incorrect.
Stitches being skipped
at the sewing start.
38
38
11
Adjust the operating
distance of the thread
wiper.
Adjust the position of
the bobbin presser.
Refer to "Skipped
stitches occur".
Adjust the height of the
thread wiper.
Adjust the height of the
thread tension stud.
Adjust the sub-tension.
Thread wiper does not
operate correctly.
Lower thread winds to
one side.
Thread winding amount
Upper thread length
Lower thread winding
amount is incorrect.
Thread slips out of the
needle.
Position of shuttle race
thread guide is incorrect
Position of shuttle race
thread guide
Adjust the position of the
shuttle race thread guide
10
11
33
Clearance between
thread wiper and work
clamp
Interference between
thread wiper and work
Adjust the height of the
thread wiper.
38
Turn off the power
and check valve 2
manually.
Sensor is not detecting
the cassette.
Cylinder pin is not
working properly.
Cassette is not ejected.
Malfunction of foot
switch
Check the indicator
lamp status.