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Shark 801B sewing machine jam

I properly thread it and test tention, yet everytime I start to sew it gets completely jammed or makes one huge knot.

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5 Suggested Answers

kent581
  • 87 Answers

SOURCE: Upper thread knots up with bobbin thread when sewing a stich

Thread test
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no mater how much thread you pull, your thread is good. If that your machine passes that test, then let me know, we can go to step 2. If not, try different spool of thread, same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Step 2:
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.
Thread knotting on the bobbin can be a lot of things but here's some guidance:
Tension:
If the thread is loose on the bottom of the fabric, it's actually the top thread is too loose. Think of 2 little elves playing tug of war in your machine, one on toip and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension)
Jamming bobbin case:
If it is damaged from turning out of place once, it could have rough spots on it that makes the thread hang on it, and keeps making it turn over and over. Use a finger nail board (fine sanding) and smoothall rough spots. Then reset the bobbin case taking care to put the notch in the bobbin case in alignment with the proper spot in the machine (basically 5 o’clock) when looking at the round area where the bobbin case goes.

Posted on Mar 18, 2009

Sunshinegal
  • 1 Answer

SOURCE: Fabric not feeding and jamming occurs

When this happens it is because the thread tension was not right so it gets stuck under the bobbin case and the feed dogs. Use a bigger lint brush and take out the bobbin casing and clean out the shuttle. When you rethread pull slightly on the thread before you feed it through the needle. This will make sure the thread is properly in the tension discs.

Posted on Apr 09, 2007

  • 192 Answers

SOURCE: Designer 1

Please, take this machine to an authorized technician before you attempt to set the timing on your own. An authorized technician will have a device to quickly tell you whether or not the timing is incorrect. If you change the timing yourself and that isn't your problem, you will spend far more money getting 2 problems fixed than the one original problem.
If the machine is making what I describe as a chattering sound, you may be able to clean the bobbin case and the ledge that it sets on and the problem will go away. This bobbin case should be operated with no lubrication. Some repairmen recommend " a drop of oil to make it run quieter". This generally makes it chatter louder. If there is any lube on the bottom of the black bobbin case, wipe it off and wipe the ledge that it rests on.
By the way, if the needle is hitting the raceway, you will be able to see the marks where it is hitting. In a Viking machine, this is normally caused by the "needle to hook clearance", not timing.

Posted on Feb 19, 2008

  • 2 Answers

SOURCE: Shark Euro-Pro Sewing Machine

I had the same problem with my Shark Euro Pro 7133. My problem was in threading the upper thread. The manual does not quite explain so I had to figure this out the hard way.

In threading the upper thread . the thread first goes down from the spool througt a groove. When it comes up it must catch a silver lever that moves up and down before moving it down againPlease let me know whether this helps.

Posted on Jul 26, 2008

  • 1 Answer

SOURCE: thread knotting around bobbin case

hello, I had the exact same problem and could not find the solution until i took my machine to my sewing sensei and i solved my tedious problem. It was actually not a tension problem at all but a threading problem. Make sure you have threaded your bobbin correctly and that when you pull on the bobbin thread that the bobbin turns the right way. (mine must spin anti clockwise to work)  Make sure that when you pull up the bobbin thread using the needle that it is not over the feed dogs connective bar but under it. A big problem when the thread gets caught around the bobbin case wheel is that the thread is looped around the feed dogs once and that causes the thread to get caught around the bobbin wheel. In conclusion, thread the bobbin correctly and read over your instruction book before spending the money to get it fixe in s shop.

Posted on Mar 31, 2009

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1 Answer

Why is the top thread not picking up the bottom thread?


use new needle,
check if the top thread is between tension discs,
increase top tension a little.

Oct 02, 2015 | Sewing Machines

1 Answer

Upper thread gets jammed in bobbin area


Try these suggestions
1. Change the needle--use a needle that's for the fabric being sewed
2. Rethread the machine--top --make sure to use every thread guide
3. try a different bobbin--make sure bobbin is inserted correctly into the bobbin case, & make sure the bobbin is turned the correct way in the bobbin case
4. make sure the thread has not come off the thread take up lever
5. Clean under the needle plate & in the bobbin area for lint or threads

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I hit a pin with my Singer Stylist 7258. It jammed. I changed the needle, rethreaded it, and turned it off and on, but it snarls up thread under the fabric, and seems that the thread does not always loop...


Good that you changed the needle. Did you rethread just the needle or did you rethread the machine? You may have already taken these steps, but if not, here is what I would suggest:

1. Replace the old needle (which you did), even if it looks ok, as it may be bent or have a tiny burr or other damage that isn't easily visible. Make sure the needle is seated properly - facing forward and fully inserted.
2. **Completely rethread the machine, making sure the thread is going through the take-up lever. It can easily pop out when the machine jams, and you can't always see that the thread is out of place. That could explain why the thread doesn't loop properly around the bobbin.
3. Remove the bobbin and clean any knotted thread or lint from around the bobbin carrier. Canned air is great for cleaning the lint.
4. Replace the bobbin, making sure the thread-end is clipped neat, not frayed or knotted.
5. Try sewing on some practice fabric to make sure the stitches are going to form properly before returning to your sewing project.
Good luck!

Apr 01, 2011 | Singer Sewing Machines

1 Answer

Have a new NECCHI 681c sewing machine.. I've threadd ir according to the video but it jams and doesn't do anyrhing and I end up with huge clumps of thread on the inside.... Help!


It will always jam if the tread isn't seated in the tension disc. put one hand on each side of the the tention disc whn you are threading and make sure that thread seats

Aug 14, 2010 | Necchi Sewing Machines

1 Answer

Sewing machine jams


does it jam up on the top or bottom?? if it shows on top it is the bottom thread if it jams on the bottom it is the top thread

Oct 12, 2009 | Husqvarna Viking 1

1 Answer

The thread keeps jamming under the fabric and making a large knot. the needle seems to get bent quite frequently and the foot drop peddle is broken - do you know how to fix any of these?


It is either incorrectly threaded and/or the top tension is too loose. Rethread carefully and start with the tension dial on no 4. Make sure thread is between the tension discs.Re the foot I assume you mean the foot which you can change for buttonholes etc. These are generally fairly interchangeable and any sewing machine supplier should have them.Im assuming you do not mean the foot pedal which you operate the speed of the machine with.

Jun 07, 2009 | Euro-Pro Shark 80 - 7133

1 Answer

Upper thread knots up with bobbin thread when sewing a stich


Thread test
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no mater how much thread you pull, your thread is good. If that your machine passes that test, then let me know, we can go to step 2. If not, try different spool of thread, same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Step 2:
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.
Thread knotting on the bobbin can be a lot of things but here's some guidance:
Tension:
If the thread is loose on the bottom of the fabric, it's actually the top thread is too loose. Think of 2 little elves playing tug of war in your machine, one on toip and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension)
Jamming bobbin case:
If it is damaged from turning out of place once, it could have rough spots on it that makes the thread hang on it, and keeps making it turn over and over. Use a finger nail board (fine sanding) and smoothall rough spots. Then reset the bobbin case taking care to put the notch in the bobbin case in alignment with the proper spot in the machine (basically 5 o’clock) when looking at the round area where the bobbin case goes.

Mar 16, 2009 | Sewing Machines

3 Answers

Fabric not feeding and jamming occurs


When this happens it is because the thread tension was not right so it gets stuck under the bobbin case and the feed dogs. Use a bigger lint brush and take out the bobbin casing and clean out the shuttle. When you rethread pull slightly on the thread before you feed it through the needle. This will make sure the thread is properly in the tension discs.

Jun 13, 2006 | Kenmore 19233 Computerized Sewing Machine

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