Question about Necchi 3101 Mechanical Sewing Machine

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Upper tension dial fell off

I have a coil, a spring, 3 washers. how does it fit on? A diagram would be helpful.

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Me too i have coil.spring,3 washers how does it fit on? diagram be helpful

Posted on Jan 06, 2010

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How does the bottom bobbin tension spring g back in?


the long bit faces the slot by which you pull the bobbin thread
the other end will have a small lip that will fit in the bobbin case near the screw hole
with the screw , it requires only a small turn to make large tension changes on the thread so it is not done up tight
the spring virtually just sits on the bobbin carrier case

Feb 06, 2016 | Sewing Machines

1 Answer

How do I rebuild the upper tension mechanism for a singer sewing machine model 507?


It's far too complicated to explain on here. You need to get a service manual for your model, or find one with a similar dial. Make sure the manual covers tension dials. Getting the spring wound correctly can be a challenge. Have you checked to see the if the presser foot lever is pressing against the tension dial from the inside of the machine?

Mar 01, 2015 | Singer Sewing Machines

1 Answer

How to adjust tension on lervia sewing machine


Tension is a balancing act between the upper tension and the bobbin tension. Balanced tension (which is not always necessary) is when the two threads meet between the layers of fabric. Not all unbalanced stitches are a tension problem. You can have loops under the fabric from a failed take up lever, improper clearance between the positioning finger or even a burr or lint. First I check the upper tension. If you can not make the upper tension normal pinching the thread after it comes off the spool will act as a tension device. If this solves your problem then start with cleaning.

You may have lint between the tension discs at the top next to the take up lever. Clean this out with the presser foot up. Next install a new needle size 80 and thread the machine. When you lower the presser foot and pull the thread the spring steel the needle is made of should bend 1/8 of an inch at normal tension. Between 3-5. If this does not happen turn to a larger number on the tension assembly. If this does not deflect the needle as you pull the thread to the left rear of the machine your tension assembly needs repair or replacement.

The bobbin tension is controlled by a spring on the bobbin case or bobbin basket (depends on the sewing machine). This spring can also get lint under it. The lint can hold the tension discs open causing no tension. This may be the problem if you see the lower thread pulling up to the top of the fabric. Normal tension on the lower thread is usually 150-200 grains. That may not mean much to you and you may not have a scale to measure that. One simple trick is to take a wooden clothes pin and glue 3 pennies to it. I then use this as a weight to set the bobbin tension. I clip the clothes pin to the thread and set it on the work bench. Next raise the bobbin case or bobbin basket without touching the thread or bobbin. Then tighten the tension screw on the bobbin case until the clothes pin lifts off the work bench.

This gives you a good place to start on balancing the tensions. Set up a straight stitch at the mid range of 2-3mm long and sew. Turn the upper tension dial to the mid range 3-5 and observe the stitch. If the bottom of the fabric shows too much top thread tighten the upper tension. If the top of the fabric shows too much lower thread loosen the upper tension. I recommend playing with your tensions to learn what too loose and too tight a tension look like. Sometimes we want the upper tension really loose to do a basting stitch. If you want to pucker (gather) you can create a long stitch and play with the tensions. A tight upper tension will pucker thin fabric. You can also gather fabric manually by using a long stitch and a loose upper tension then bunch the fabric together on the loose threads.

After all that it may be easier to take this to your local dealer and ask for advice.
Have a great day and keep on sewing.

Jun 22, 2014 | Sewing Machines

4 Answers

How do I tighten the stitch when the loop coming down around the bobbin thread is loose?


Hi there, there are a number of possible issues/solutions if your top stitch is loose 1. check to make sure it is actually in between the pressure discs on the tension dial...it's sneaky and will sometimes jump out to the front or the back but look like it's still in place. 2. Loosen the bobbin tension, sometimes even if the top is loose, you can counter that with a more loose bobbin tension. 3. Check the spring in the tension dial. PAY ATTENTION TO HOW THINGS COME OFF,THEY HAVE TO GO BACK ON IN REVERSE ORDER...With that being said, twist the knob counter clockwise until it comes off, then check the spring to see if it is damaged or if the 'spring' in the spring has gone on vacation. While you're there, clean all the bits with a clean dry cloth. Some threads are bonded/coated and leave a residue behind that can affect tension. 4. Another option is to wrap the thread around the tension dial twice, you may have to loosen the tension at that point ...just a bit at a time. 5. Make sure it is threaded properly, you may have missed something along the way (I am notorious for that, even though I've been doing this for a few centuries), the thread broke, or came out of the needle, it may have undone itself further back than you realized. That's all I've got, hope something helps, good luck.

Jun 12, 2014 | Juki DDL-8700

2 Answers

I unscrewed the part over the light bulb, than the smaller part that holds the thread tension bit and a small coil fell off, I don't know where it goes back, can I find anywhere a diagram of the machi


I cannot help and doubt a diagram could be found with that much detail but you could try the manufacturer. I suspect that the coil had been around the screw you removed or in the screw hole.

Dec 01, 2011 | Janome Harmony 2039 Mechanical Sewing...

1 Answer

I have a pfaff 1525 and My bobbin thread forms a loop every 2-3 inches and I am trying to make a veil. I am using a ball point needle size 9 and adjusted the tension wheel to a 6 since the lower the number...


check to make sure that around the tension dial there is no lint or dust
the upper tension spring could be bad
a sewing machine repair shop could tell about the tension spring

Aug 02, 2011 | PfaFF Sewing Machines

1 Answer

Can't balance top/bottom thread tension-model 158.Bottom thread is a straight line. Have increased top tension to the stop. No effect.Have reduced bobbin tension until bobbin and case fall freely when held...


I disassembled the top thread tension controller consisting of 12-13 pieces, including 2 springs. Since they all fell out on the table I spent about 2 hours learning the proper stacking order on the central shaft.
With a combination of reasoning based on each unique piece shape and trial and error I put it back together, adjusted top and bottom tensions according to the instruction booklet for the machine, tested some stitching, made final adjustments and all worked well.
I don't know what was changed in the process but it worked.
Don

Sep 03, 2009 | Kenmore Sewing Machines

1 Answer

Thread tension dial


Hi , the two washer are assemble the curve should be back each other , first put a piece of thin tosser like a small nail put spacer can struck the tosser ,put washer back to back cone retainer next spring next cover with number indicating tensioner of thread next the knob.Put the tread between two cuve for enough tension.

Feb 22, 2008 | Euro-Pro Dressmaker 998B

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