Bedienungsanleitung Juki TL-98Q (Seite 31 von 34) (Englisch, Französisch, Spanisch)

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1. The needle is bent or the needle point is blunted.

2. The needle has not been attached to the needle

bar properly.

1. The machine head has been threaded incorrectly.

2. The needle thread tension is too high or low.

3. The needle is bent or the needle point is blunted.

4. The needle is not suited to the thread used.

1. The bobbin thread tension is too high.

2. The rubbing of the bobbin case spring has

produced a slot.

3. Scratches on the needle hole in the throat plate.

1. The needle is bent or has been installed

improperly.

2. The needle hits the throat plate or the presser foot.

1. The presser foot applies too much pressure to

the material.

2. The tension of the needle thread is not balanced

with that of the bobbin thread.

3. When the combination of the needle and the

thread is improper.

4. The needle is too thick for the material.

1. The tension of the needle thread is not balanced

with that of the bobbin thread.

1. Dust accumulates in the feed dog

2. The oil in the machine has run out due to a long

period of usage.

3. The oil other than the exclusive sewing machine

oil is used.

4. Thread wastes accumulate in the hook.

1. The thread is entangled and caught in the hook.

1. The stitch length is set “0”.

2. Drop-feed knob is set to “NOT FEED”.

3. The pressure of the presser foot is too low.

1. When the needle has not been raised.

2. When the needle has not been inserted until it can

go no further at the time of attaching the needle.

3. When the sewing machine has been turned with

the needle threader lever lowered (during

threading) by mistake.

Troubles and Corrective Measures

If sewing difficulties occur, make sure the instructions are correctly followed. If a problem still exists, the reminders below help to solve it.

Troubles Case Corrective measures Page

Stitches are

skipped.

Needle thread

breaks.

The bobbin thread

breaks.

The needle breaks.

Stitches are

puckered.

Stitch performance

is bad.

The rotation noise

is too heavy or too

high.

The handwheel

does not rotate

smoothly or does

not turn.

The material

cannot be fed.

Needle threading

cannot be

performed.

· Replace the needle.

· Attach the needle properly to the needle bar.

· Correct the threading.

· Properly adjust the thread tension.

· Replace the needle.

· Replace the needle by the one suited to the thread

used.

· Decrease the tension.

· Replace the bobbin case.

· Replace the throat plate.

· Replace or correctly attach the needle.

· Correctly position the needle, throat plate, or

presser foot.

· Decrease the pressure of the presser foot.

· Balance the tension.

· Properly correct the combination of needle and

the thread.

· Replace the needle by the one suited to the material.

· Balance the tensions.

· Carry out maintenance of your sewing machine.

· Apply the proper sewing machine oil.

· Clean up the sewing machine.

· Lubricate the hook, strongly turn the handwheel

clockwise and counterclockwise several times,

then remove the thread caught in the hook.

· Set the stitch length to an appropriate amount.

· Set the drop-feed knob to “FEED”.

· Turn the presser foot pressure regulator to increase

the pressure properly.

· Turn the handwheel or press the needle up/down

switch to bring the needle to its highest position.

· Attach the needle properly.

· Slightly turn the handwheel by hand to the opposite

side (opposite to the direction at the time of sewing).

16-18

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Juki TL-98Q Seite 31

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