Tangled thread on wrong side of fabric (2024)

SM2700

Date: 05/27/2024
ID: faqh00100036_030

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Tangled thread on wrong side of fabric

Symptom

The thread becomes tangled on the wrong side of the fabric.
After starting sewing, a rattling noise is made and sewing cannot continue.
Looking under the fabric, there is tangled thread in the bobbin case.

Cause

Incorrect upper threading

If the upper thread is incorrectly threaded, the upper thread passed through the fabric cannot be firmly pulled up and the upper thread becomes tangled in the bobbin case, causing a rattling noise.

Remedy/check details

Remove the tangled thread, and then correct the upper threading.

Removing the tangled thread

Turn off the sewing machine.
Remove the tangled thread. If it cannot be removed, cut the thread with scissors.

For details, refer to "How do I clean the machine? (Cleaning the race)".
If the threads remain under the needle plate, remove the needle plate, and then remove the threads.
Raise the presser foot lever to raise the presser foot.
Remove the upper thread from the machine.
If the needle plate and the bobbin case were removed from the machine, correctly install the bobbin case and attach the needle plate.

For details, refer to "How do I clean the machine? (Cleaning the race)".
If the bobbin was removed from the bobbin case, correctly install the bobbin.

For details, refer to "How do I install the bobbin wound with thread? (For models equipped with a quick-set bobbin)".

Threading the upper thread

[1] Preparing for threading

Turn off the sewing machine.
Raise the presser foot lever to raise the presser foot.

Raise the needle to its highest position by turning the handwheel toward you (counterclockwise).

(1) Turn toward you so that this mark points up to the highest position.
Be sure that the presser foot is raise and the needle is correctly raised. If the operation is not performed properly, it may cause troubles during sewing and poor sewing results.

[2] Threading the upper thread

Correctly setthe spool of thread to the spool pin.
- If the spool of thread is in the wrong place, or is set incorrectly, the thread may tangle on the spool pin and cause the needle to break.
While holding the thread from the spool with your right hand, pass the thread toward you, in the groove on the thread guide.

(1) Spring
- Make sure that the spring in the groove catches the thread.

Feed the upper thread as shown in the following illustration.

(1) Thread take-up lever
- Make sure you guide the thread through the thread take-up lever from right to left as shown in the illustration above.
Put the thread behind the guide above the needle.

(1) Needle bar thread guide

[3] Threading the needle

Lower the presser foot lever.
Make sure that the mark on the wheel points up as shown in the following illustration.

(1) Mark on the wheel

While lowering the needle threader lever, hook the thread onto the guide.

(1) Needle holder
(2) Needle threader lever
(3)Guide

Pull down the needle threader lever as much as possible, and then turn the lever toward the back of the machine (away from you). Make sure that the hook passes through the eye of the needle and grabs the thread.

(1) Hook

(2) Thread

While lightly holding the thread, turn the needle threader lever toward the front of the machine (toward you). The hook will pull the thread through the needle.

Raise the needle threader lever.

Pull the loop of the thread passed through the eye of the needle toward the rear of the machine.

(1) Loop of thread

Raise the presser foot lever.

Pass the end of the thread through and under the presser foot, and then pull out about 10 cm (approx. 4 inches) of thread toward the rear of the machine.

(1) 10 cm (4 inches)