Question about Singer Quantum 9940 Computerized Sewing Machine

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I have always had singer machines, now have a Quantum 9940, very disappointed in it. It does not sew smoothly, After pulling bobbin thread up to sew,after a few stitches, it breaks bobbin thread. It Is just a joke.

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Go to website www.singerco,com and call their customer service. They are topnotch, with that machine why not take it where you bought it, just curious?

Posted on Aug 24, 2010

  • Jan M Jones Sep 26, 2010

    I did take it back, suposedly worked on it . Got it back and they didn't even put needle threader on right,
    Will try going to web site,Thank you.

  • Mary Dunn Sep 26, 2010

    I sure hope they can help you, it is so discouraging to buy what you think is great only to have it be a pain in the neck. You deserve some good old fashioned customer service, good luck. Let me know how you make out.



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My machine will not pick up the bobbin thread

Install a brand new needle (verify it is facing the proper direction).

Remove all the thread from the machine. ALWAYS RAISE the presser foot when threading. Rethread the machine from the beginning--verify the thread path is correct. Leave at least 4-6" of thread tail. from the needle (Avoid using old or bargain bin thread.)

Insert the bobbin in the bobbin case (make sure the bobbin is turning the correct direction) and thread the bobbin case. Load the bobbin case in the machine. Leave at least 4-6" of thread tail.

Set the upper tension to the midway point.

Retest your machine. Turn the handwheel toward you manually until the needle completes one full cycle of going down and up.

If it is still not picking up the bobbin thread, it may have a needle/hook timing issue. Take it for service.


Jun 08, 2016 | Singer Quantum 9940 Computerized Sewing...

1 Answer

On a Singer Quantum 9940, the upper thread will not 'catch' the bobbin thread. What should I try to do?

Make sure that your needle is all the way up. With many needle clamps, loosening it enough to remove a needle is not enough to insert one -- you have to loosen it a little bit more. You can determine that by looking right above the clamp on the shaft -- there is what looks like a grey bar and the end of the needle should be right under it. If your needle is too low, it will not catch the thread.

May 24, 2014 | Singer Quantum 9940 Computerized Sewing...

1 Answer

I have recently bought Singer Quantum 9940 and I am not happy with the stitch. For zigzag stitch, I can see too much of the upper thread on the bottom side. This happens unequally: more on the right hand...

1. Make sure your needle is correct for the fabric. Go buy some good needles in several sizes. You'll need a 90 for jeans, rounded points for fine fabrics... get a few sizes. Your manual should provided you with clues to the right needle for the fabrics. (BTW... there really is no such thing as a Universal Needle... toss it.)

2. Re-read your manual and carefully follow the instructions on threading the bobbin and the upper thread...

3. Check your tension on the upper thread... it is too loose for the application. The tension on the bottom thread is handled by a spring on your bobbin case or race. If you do not have that threaded properly you'll have problems. Same with the direction the bobbin turns... have in it backwards... problems.

Barring all these things... It might be time for a qualified Singer repair person to look at it. Sadly Singer has seriously lowered it's standards in the last 20 years.

Feb 05, 2011 | Singer Quantum 9940 Computerized Sewing...

1 Answer

My thread got caught up under the bobbin plate and I got it out, but now the machine won't sew.

Could be a bent needle. Maybe there is still thread under the plate over the feed dogs. I am not familiar with your machine but I have had this problem with many other machines. You got all the thread out of the works.

Nov 27, 2010 | Singer Quantum 9940 Computerized Sewing...

1 Answer

My Singer Quantum 9940 keeps stopping and displaying threading problem. I've re-threaded it 100's of times but it still stops after one inch of sewing!

There may be something in the tensioners. Try to clean between the tension discs with a business card. Maybe this will help

Aug 23, 2010 | Singer Quantum 9940 Computerized Sewing...

1 Answer

Won't pick up bobbin thread

Refer to your manual to be sure the needle and bobbin are installed correctly.

If the needle is in wrong, the thread will not guide down the groove on the needle shaft and through the eye as it should in order to form stitches with the bobbin thread.

Apr 29, 2010 | Singer Quantum 9940 Computerized Sewing...

1 Answer

Small loops forming on bottom stitches under fabric

Thread the machine with the presser foot up. This opens the tension so the thread can properly enter and be feed to the needle according to the tension setting.

When you thread a sewing machine with the presser foot down, the thread does not enter the tension control as it should and the control has no control.

No control of the top thread and it cannot "knit" with the bobbin thread and you get loosey-goosey-loopy stitches that appear to be the fault of the bobbin.

Feb 28, 2010 | Singer Quantum 9940 Computerized Sewing...

1 Answer

Electronic alert keeps coming on but the machine is running fine?

Try replacing the needle. it may be just ever so slightly bent. You can not tell. causing more downforce on the machine.

Jan 06, 2007 | Singer Quantum 9940 Computerized Sewing...

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