Question about Necchi 3101 Mechanical Sewing Machine

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Thread clogs up bobbin and knots up thread on back side of fabric

Immediately when starting to sew thread knots up and clogs up bobbib

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  • Cheryl Oct 15, 2011

    Did you try and clean out the bobbin, shuttle and race area? If there is the tiniest thread or a bit of lint in there it will throw a hissy fit! Make sure you also put in a new needle. Also rethread it once more after your done. Use a can of air in the bobbin area as it should blow out all the stuff in there.

  • Anne Morton
    Anne Morton Apr 04, 2018

    This is a brand new machine. Can’t be dirty. I don’t understand the manual instructions



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Hi there,
well, common problem when you didn't acquired right set up of tension and clean feed dog,bobbins,shuttle race.on figure right bobbins winding.thread clogs up bobbin and knots up thread on back - d329aa1.jpgset up counter clokwise thread rotation, set dial tension on #3 to #4, dial stich to # 8 to #12
only on cotton fabrics,others fabrics such as silk..etc,gradually adjust tension fine the smoothest adjustment,
on fig,thread looping top side threading50302ec.jpg follow threading so you can have fine sewing.also clean under bobbins from chips fabric and dust.have a nice day,don't forget to rate my fix,ythanks a lot

Posted on May 16, 2009

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I hope this helps: I bought a machine, and had the same problem... I read reviews, found that soOo many people were having this same problem. I thought it was a defect or something with the brand of machine so I exchanged it for another... well, the instruction aren't always clear. Not until I watched a DVD that came with my new machine did I realize I wasn't running the thread through the bobbin correctly. I had been just running it through the hole in the bobbin case... not right. Don't just thread it through the hole from the inside. When you place the bobbin in the case, pull out some of the thread and run it from the side between the little **** / split in the metal and you have to pull it down to the left and UNDER the metal strip held by the tension screw (the little sliver of metal). So, the thread is actually being pressed between two pieces of metal. I felt like a "dingbat" when I realized why I couldn't work it. This is kind of hard to explain, but I hope this helps...

Posted on Jun 01, 2009

  • crochetmama Sep 29, 2010

    I also had this problem and on reading the manual I discovered that if the tension is too tight in the bobbin thread, it will gather and glob and cause a problem. On the bottom of page 12 of the manual it says that "Lower thread tension can be adjusted by turning screw on bobbin case slightly to the right (clockwise) to INCREASE tension. Anti-clockwise to the left to DECREASE tension."

    This one little instruction made all the difference in the world for me, as well as making sure the thread in the bobbin was put into the case correctly. Necchin DVD and manual leave much to be desired, but if you just patiently read each section and play with the parts you're reading about, you can figure it out. (If I can do it, ANYONE can!!) This is a year after you asked your question but I hope this helps someone else.

  • R.A. Ellis
    R.A. Ellis Apr 05, 2018

    Before threading the top thread, be sure to ALWAYS RAISE the presser foot. This allows the thread to seat fully in the tension disk. Failing to do this will frequently cause the top thread to make globs of knots under the fabric.


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Before threading the top thread, be sure to ALWAYS RAISE the presser foot. This allows the thread to seat fully in the tension disk. Failing to do this will frequently cause the top thread to make globs of knots under the fabric.

How to Thread Necchi Sewing Machine


Posted on Apr 05, 2018

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I have a Bernina Deco 330, I am having issues with the Bobbin thread coming through on top of design. It is also tieing the knot in top of the fabric. The design will be flipped, the smooth side on back of...

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Recheck the top thread and bobbin tension for equal balance of thread when sewing. The knotting of thread problem is usually because the tensions are too tight or too loose and/or thread may not be properly threaded. Another reason is when the bobbin thread is wind imbalanced it will cause the thread to knot-up when sewing. This problem is notorious when the bobbin is winded within the bobbin case on some machines. The bobbin thread need to be wind smoothly in the bobbin to avoid this problem.

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Bobbin continues to pose problem - knotting thread underside of fabric,

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ALWAYS be in the habit of threading your machine with presser foot up so that while threading between paths 1 and 2 you are certain to have the thread pass throught the tension disks.

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hi! there wind thread on bobbins winder 4 times by your hand rotate clockwise,insert in shaft bobiins winder on top of your machine near hand wheel push latch to engage loop thread on disc winder tension start your machine on pedal foot automatically winder disengage if already filled up of thead pull this winder and insert to bobbins casing insert thread to slot and pull out winder 6411c87.jpgshould rotate clockwise as shown.insert on shuttle hook casing and close cover needle thread your upper

97b52e8.jpgthreading tension as shown on red threading from spool pull threading and loop to dial tension threading and insert thread to lever needle and to needle hole tip. pull tread under the needle foot and feeder tooth.rotate hand wheel counter clockwise to hook up thread bobbibs and appear at top of needle plate,teo thread shoul appear,set dial tension to # 3 and stich to # 8 range to # 12 depend on fabric and layer of fabrics and set on straight stich sewing,let needle on upper position insert fabric for trial sewiing.put down foot needle lever. manually by hand rotate for assurance needle is free to sew if obtruction on loop bobbins thread occurs adjust all tension gradually then try again until free from sewing w/o problem star sewing.

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