Performance Check List - JUKI HZL-F Serie Manual De Instrucciones

Performance check list

If sewing difficulties occur, make sure the instructions are correctly followed.
If a problem still exists, the reminders below may help solve it.
Case
● The machine stops sewing
suddenly.
(This is in case you can
turn hand wheel by hand.)
● The machine will not
work even when started.
● The machine will not work
even when start/stop
button is pressed.
(This is in case sewing
light is still on.)
● Needle breaks.
● Loud noise and/or keen
noise while sewing
● Machine fails to feed
fabrics.
● Needle can not be
threaded. (This is in case
needle threader will not
turn.)
● The hook of needle
threader does not go
through the needle eye.
149
Cause (Reason)
● The machine sews at slow speed
continuously.
(The machine has a mechanism to
automatically cut off the power to prevent
the motor from overheating.)
● Presser foot is in up position.
● The needle hits presser foot due to an
installation of incorrect presser foot.
● The needle fell into the hook area and
tried to start.
● Thick material is sewn with a thin needle.
● The needle is not inserted fully.
● The needle setscrew is not securely
tightened.
● The wrong presser foot is used for a
certain pattern.
● Lint or dust has accumulated in the
feed dog.
● Lint or dust has accumulated in the hook.
● The stitch length is set at "0".
● Soft fabrics such as towels are being
sewn.
● The machine is set in drop feed
condition. (the drop feed knob is on the
right side)
● The needle is not in the up position.
(When needle is not in the up position,
needle threader will not turn.
This is to avoid damages to the hook.)
● The needle is not inserted fully.
Solution
● Turn off the power and wait for a
while (about 10 minutes). The safety
mechanism will be reset and the
machine will return to normal.
● Lower the presser foot and start to
sew.
● Use the appropriate presser foot
to the selected stitch pattern.
● Remove the needle from the hook
area.
● Check the combination of fabric,
thread and needle.
● Check the installation of needle.
● Securely tighten the needle
setscrew.
● Check the combination of stitch
pattern and presser foot to be used.
● Clean the feed dog area.
● Clean the hook area.
● When the stitch pattern is
reselected, the machine goes back
to the default setting.
● Set the stitch length to 3 - 5.
● Set the drop feed knob to left side.
● Rotate the hand wheel and lift the
needle upwards.
● Check the installation of the needle.
Refer-
ence
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