Tension to tight

If your Singer Heavy Duty 4423 is jamming when you try to sew in reverse, it may be due to a few issues:

1. Thread tension: Make sure your thread tension is not too tight, which can cause the thread to bunch up and jam the machine. Try loosening the tension slightly.
2. Needle: Make sure you are using the correct needle for the fabric you are sewing. A dull or damaged needle can cause the machine to jam.
3. Bobbin: Check your bobbin to make sure it is threaded correctly and is not damaged.
4. Machine maintenance: It's important to keep your machine clean and well-oiled. A buildup of lint or dirt can cause the machine to jam.
5. Sewing speed: Slow down when sewing in reverse. Sometimes going too fast in reverse can cause the machine to jam.

If none of these solutions work, it may be a mechanical issue with the machine and it's best to take it to a professional for repair

It sounds like the bobbin tension is too tight or the top tension is too loose. It is a delicate pulling game that needs to be just right. Bird nesting is a sure sign of tension issues.

https://www.google.com/search?q=setting+bobbin+tension

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It simpy needs service and changing minor parts hear and there

Slow down the movement of the needle. Make movement of the fabric a little faster. If this happens when you are sewing fabric with the feed dog operating then the bobbin tension is too tight (top set at four). Also, make sure the pressure foot isn't set too tight. If the material is thin you will probably need to use stabilizer.

check again how it is threaded as the thread can get behind the tension plates and jam around the threaded bolt mostly unnoticed during the process

Is the tension too tight? Are the tension discs clean? Remove bobbin case, clean it and re-thread as this may be jammed.

Good day!

please try this simple tips:

Good day!

A sewing machine operator can often help themselves when their machine does not operate properly.
Here are some simple instructions, which if properly used can save time and mechanics service calls.
TROUBLE;UPPER THREAD KEEPS BREAKING;
This could be trouble;================Do this;
1.Top tension to tight================loosen tension 1 turn
2.Machine improperly threaded=========check threading
3.Thread twisted on guide post========"
4.Thread twisted out of tension======="
5.Take up spring bent or broken=======Check action of spring
6.Thread jumped off pull off finger===Check threading
7.Needle bent or burred===============new needle
8.Bad cone of thread==================try another cone
TROUBLE;LOWER THREAD KEEPS BREAKING;
1.Bobbin tensionspring to tight=======Loosen tension slightly
2.Bobbin threaded wrong===============check threading
3.Bobbin wound to tight or uneven=====try new bobbin
4.lint or thread on bobbin case=======clean inside case
5.Lint or thread inside hook==========clean inside hook
6.Bobbin case nicked bent or burred===check/change case
TROUBLE;MACHINE STARTED SKIPPING STITCHES;
1.Needle bent or burred===============change
2.Needle set in crooked===============Check
3.Thread jumped off take up spring====check threading
4.Thread jumped off pull off finger===check threading
TROUBLE STITCHES SHOWING LOOPS;
1.Forming loops on top of cloth=======Tighten bobbin tension
======================================or loosen top tension.
2.forming loops on bottom of cloth====Tighten top tension
3.Bobbin placed in case incorrectly===remove and replace
4.Bobbin thread slipped from under====check threading of
tension===============================bobbin case
5.Lint or thread in top tension=======clean between tension discs


Thank you and good luck.

It sounds like the tension setting is too tight. The tension mechanism consists of two metal disks; the thread runs between these disks. When the pressure foot is down, the disks come together, trapping the thread between them. When the pressure foot is up, the disks separate and the thread can flow freely. (BTW, this is why you adjust the tension with the pressure foot down.)

Take a look at your tension setting and try loosening it. That should resolve the problem.

Let me know if this helps, ok?


Robbie

take the bobbin out check for debris (pieces of thread, lint, etc.) that may be jamming the bobbin. check under the feed plate for a thread jam or debris. check if your bobbin is wound too tightly. it can happen! then it will keep breaking. the other adjustments are mainly for thread tension- the spool on top. if they're too tight, the thread will keep breaking. you can tell- once they're properly adjusted- by the quality of the stitch. check the bobbin first! if it's too tightly wound, you can probably adjust the winding tension on top. try a different bobbin. if that works then 'rinse and repeat!'.
good luck!

what you have is known as bird nesting and is from the needle tension not being tight enough
before you thread the needle pull the thread and the correct tension is when there is noticeable resistance to pulling the thread
always check adjustments using scrap material