How do i fix the top thread just tangling, looping on the shutter race?

This means the rotary hook is not catching the top thread and looping it around the bobbin.

Be sure the needle is not bent and top thread is properly threaded. Be sure needle is properly oriented and seated in the needle bar.

Be sure you have bobbin properly wound, inserted, and threaded per machine instructions.

Download your owners manual from the Singer website at...

https://res.cloudinary.com/singer-sewing/image/upload/fl_attachment/Singer-Website-Library/outdated_product/3cf22829df0e29cefa14c8141bd10ddccf20d614_0.pdf

Try cleaning hook and race area if still having trouble.

If it was working fine and it recently broke a needle and/or jammed, the timing may have slipped.

Could be

• bent needle
• needle not properly inserted into holder or loose
• bobbin spool wrong way in case
• bobbin case
• debris in shuttle hook race
• shuttle hook damaged
• timing has slipped

Try observing shuttle hook movement as it rotates to capture the top thread loop behind the needle as the needle rises from bottom of stroke. See animation https://www.youtube.com/watch?v=zqRvljnNLFk

comment here for further assistance.

Can be several causes. In typical probable order for rotary hook machines;
1.Top thread tension is too high (lower tension)
2.Top thread snagging at spool or elsewhere (for hoizontal spool use larger spool cap and/or machine not threaded per specific instructions)
3.Bent needle or barbed needle point (replace needle)
4.Needle not properly inserted into holder (see specific machine instructions)
5.Debris in shuttle hook/race (clean bobbin, hook, race)
6.Wrong bobbin (replace with proper machine bobbin)
7.Bobbin thread tension too high (reduce bobbin spring pressure, likewise top thread tension)
8.Poor quality or extremely light thread (if using cotton only thread, test sew with a polyester blend and see if problem goes away)
9.Bobbin case (replace bobbin case)
10.Machine timing. (check/adjust timing)
11.Burr in hook race, this can happen if a broken needle point jams in the race (remove burr or replace race)
12.Machine timing. (adjust timing)
13.Hook is worn or damaged (typically not a worn hook unless a few hundred hours of use, look for a barbed or bent hook point) Watch following Singer video... see testing top thread tension.
https://www.youtube.com/watch?v=O7N4XaIV6ms
and following animation on generic rotary hook sewing https://www.youtube.com/watch?v=zqRvljnNLFk

Bottom tension issue or needle timing issue

1. There are many bobbin cases. Make sure the right one is installed. Also, once you have it installed check the handle of the bobbin case to make sure it is going flat with the bobbin case.
2. Check the bobbin you are using. If it is too long it will protrude the length of the bobbin case. It must be able to spin freely.
3. Check the bobbin case on the outside for any rough edges that could hang up on thread.
4. The bobbin tension should be checked. I've attached a guide for this. Your's is the older style.
5. Make sure the top is threaded properly. Especially make sure the thread is going through the thread in the right direction.

1. There are many bobbin cases. Make sure the right one is installed. Also, once you have it installed check the handle of the bobbin case to make sure it is going flat with the bobbin case.
2. Check the bobbin you are using. If it is too long it will protrude the length of the bobbin case. It must be able to spin freely.
3. Check the bobbin case on the outside for any rough edges that could hang up on thread.
4. The bobbin tension should be checked. I've attached a guide for this. Your's is the older style.
5. Make sure the top is threaded properly. Especially make sure the thread is going through the thread in the right direction.

Clean out the bobbin area if there are any thread tangles there.

Refer to the maintenance section of the manual - see the configuration of the bobbin case and shuttle race? The bobbin case as an extending arm and the race a notch. When inserting the bobbin case into the shuttle, turn the handwheel so the needle is at it's highest position. Then lift the lever on the back of the bobbin case and insert the cast into the shuttle, arm pointing straight up toward the bed of the sewing machine.

Now thread the machine with the presser foot up - always - and see if the tangling stops.

When you forget to lift the presser foot before threading the machine, the tension control does not open to capture the thread. Then when you begin to sew, the top thread has no tension, and the bobbin thread, which does have tension, pulls the top thread to the bottom in messy loops.

You need to sew the first stitch slowly. Lower the needle by hand and take up carefully. Pull the needle thread up and the bobbin thread should be caught in the formed loop and come with it. Pull them both to the back of the machine and sew.

check that the needle is in the right way round i.e. with cut out on the needle facing into the machine. if this is fine then check that as the needle comes back up from the lowest point that it goes to, that the point on the bobbin case passes just above the hole in the needle, i.e. in the middle of the cut out.(if not it needs re timing) if threaded a small loop should appear at this point for the bottom bobbin to catch if not slacken the top thread and try again.

can not thread bobbin...bobbin on top