Filter
Top Products
12. TROUBLESHOOTING
BAS-300G, BAS-311G, BAS-326G
71
12. TROUBLESHOOTING
• Please check the following points before calling for repairs or service.
• If the following remedies do not fix the problem, turn off the power switch and consult a qualified technician or the place of
purchase.
CAUTION
Turn off the power switch and disconnect the power cord before carrying out troubleshooting.
If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.
Problem Cause Remedy Reference
Work clamp moves stiffly.
Apply a suitable amount of grease to the
sliding parts of the work clamp.
Work clamp does not
lift.
Work clamp does not
drop.
Air tube of presser lifter cylinder is bent
or damaged (pneumatic work clamp
specifications).
Straighten the bend in the tube or
replace the tube.
Work clamp lift amount setting at
operation panel is incorrect
(motor-driven work clamp
specifications).
Change the work clamp lift amount
setting.
P. 31
Work clamp lift amount
is incorrect.
Work clamp arm lever position is
incorrect. (pneumatic work clamp
specifications)
Adjust the position of the work clamp
arm lever.
P. 66
Work clamp arm stopper position is
incorrect (motor-driven work clamp
specifications).
Adjust the position of the stopper.
Work clamp does not
lift to the maximum
height.
Cylinder joint position is incorrect.
(pneumatic work clamp specifications)
Adjust the position of the cylinder joint.
Adjust the height of the thread wiper. P. 63
The thread wiper is obstructing the
needle.
Adjust the stroke of the thread wiper. P. 63
Thread wiper does
not operate correctly.
Thread wiper position is incorrect. Adjust the stroke of the thread wiper. P. 63
Lower thread winds
to one side.
Bobbin winder tension assembly height
is incorrect.
Adjust the height of the bobbin winder
tension assembly.
P. 22
Lower thread winding
amount is incorrect.
Bobbin presser position is incorrect. Adjust the position of the bobbin presser. P. 22
Stitches being skipped at the sewing
start.
Refer to "Skipped stitches occur". P. 72
Thread slips out of
the needle.
Upper thread trailing length is uneven. Adjust the sub-tension. P. 24