Question about Bernina Virtuosa 160

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Bobbin tension Help! I live in the TRNC (Northern Cyprus) where there are no service engineers at all. My bobbin tension on the above machine seems to miss all the time - the lower stitch is looping and not connecting with the upper stitch; timing? I've cleaned it thoroughly for lint to no avail - I'm desperate.

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May i know the exact model/maker of your sewing machine?

Posted on Sep 09, 2008

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    micromaster Sep 09, 2008

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    TENSION: As you change projects and start sewing on different
    weight materials, you should test stitch on a piece of scrap material
    of the same weight before beginning the actual project so you can
    adjust your upper tension to that particular fabric. As an example, if
    you're changing from a denim type fabric to a silky fabric, you would
    definitely want to make sure the tension is correct and the stitching
    looks right before you start to sew the garment.

    To determine whether the upper tension is too tight or too loose for
    the fabric you're wanting to use, try the following test. Take a small
    scrap of the fabric, fold it, and stitch a line ON THE BIAS of the
    fabric, using different colours of thread in the bobbin and on top.
    Grasp the bias line of stitching between the thumb and the index
    finger. Space the hands about 3 inches apart and pull with an even,
    quick force until one thread breaks. If the broken thread is the colour
    of the thread in the needle, it means that the upper tension is too
    tight. If the broken thread is the colour of the bobbin thread, the
    upper tension is too loose. If both threads break together and take
    more force to break, it means that the tensions are balanced.

    BOBBIN: The most probable cause of the lower thread breaking is
    an improperly wound bobbin. Regardless of where you wind the bobbin,
    inside the machine, on the top of the hand wheel or on the front side
    near the hand wheel, the basic "bobbin" rules apply.

    Always start with an empty bobbin. Never wind one colour over another colour.

    Don't wind the bobbin so full that it would be tight and hard to insert
    into the bobbin case. Most machines have an automatic "shut off" when
    the bobbin gets full, but if yours does not, be careful not to fill it
    too full.

    Wind the bobbin evenly across and in level layers.

    Never mix different sizes of thread in the bobbin and on the spool,
    unless you're doing sewing machine embroidery or some specialty type of
    sewing. Using different weights of thread on the spool and in the
    bobbin for general sewing will cause ragged stitches as well as other
    stitching problems.



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Brand new machine, do I need to oil it? singer talent 3321 is suppose to be EASY...needle broke, now it will not sew, seems to be stuck and bobbin seems to not work.

1. You need to remove the bobbin case and adjust the tension. The tension should allow the thread to move with a slight tension. Clean the area with a qtip. The bobbin case sits in a an area that is called the race. The race needs one drop of oil. Replace everything.
2. Replace the needle. Make sure it is in the right direction. Thread the top while the foot is up. If the thread gets stuck while threading there is a problem. The thread should move easily while the foot is up. After you thread the machine except the needle you can put the foot down. Now pull on the thread. It should give you a slight amount of tension. Usually four is a good number. If the tension is too tight you can adjust as needed. Now, thread the needle. Hold the thread under the foot while you turn the hand wheel. The bobbin thread should come up.
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I cannot adjust my tension. Have had this machine for over 20 yrs & no problems. I have tried different needles, different thread, re threading several times, tried adjusting bobbin case & top...

try this suggestions
take the thread out of the needle, now hold the needle thread in
your right hand,, with your left hand hold the thread above where it
goes into the top tension guide and floss the tension guide,,like you
would your teeth, and see if that stops the what's called bird nest on
the bottom of the fabric.
also clean under the needle plate and in the bobbin area for lint
make sure the needle is inserted correctly
make sure the bobbin is turned the right way in the bobbin case.
if it doesn't help,,then the machine needs to be taken to a sewing
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Usually, it is the top thread causing the problem. Rethread entire machine. Then, pull both threads (upper and lower) with the presser foot up and leave a 6" tail. Make sure that you do not miss any guides, check your manual to make sure that you haven't missed a guide in your threading, and the direction of your thread on both bobbin and upper going the right way Youtube has excellent videos on threading for free..

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Buy a new bobbin case. It is the fastest,easiest way to fix the problem.

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