Singer Quantum 9940 Computerized Sewing Machine - Answered Questions & Fixed issues

Please explain. Need more info.

.. Singer 9920 Service Manual To Turn Off The Audible Beep

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.

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. ..

try these links http://www.singerco.com/uploads/download/3bba0bd12a49d22b1f93ff737973976f32bbcd05.pdf http://www.singerco.com/uploads/download/187_9940_wkbk.pdf

Look to see if spring is broken or disconnected.

here is a link for some parts http://www.sewingpartsonline.com/singer-9940-sewing-machine-parts.aspx you can also try ebay for parts

try this link for parts

Hi you can download a free manual from Singer.
http://www.singerco.com/accessories/manuals.html
Just type in 9960 in the search box and click on search.
It should give detailed instructions on winding a bobbin.
If this does not help, try this video from youtube:
http://www.youtube.com/watch?v=DlrTnW_FUqA

When you pull the needle threader down it seems like it is pulled all the way down but it isn't. Pull it a little harder and it will turn and go down all the way to match up with the needle eye. I was a little scared to apply the extra "force", thinking I could break my new machine. Just be easy with it and it will work just like the manual says.Good luck....

Your Singer 9960 uses Style 15J bobbins, they cost around $1.50 each. You can get them at most Fabric Stores, Ebay and Amazon . You have a great sewing machine enjoy it and have fun. Good luck

check with youtube for a video

try youtube

glad you got it working.happy sewing

some of the manuals are showing people all the helpful informationthey need to know.

Your needle may be new, but Is needle correct size for fabric you are sewing? If so, is needle all the way up as far as it will go in needle bar shaft, flat side in back & more rounded side facing you? Stretch knits and wovens, denims, and leather do not use same needle size. Jimmy

It sounds like the main control circuit board (the brains) is defective/burned out

Have you actually put fabric under the foot, and started sewing a few stitches? On some machines the feed dogs do not reengage until the machine has gone through a full stitch sequence. So it looks like they are still down and nothing is happening until you've actually pressed the pedal and tried to stitch again. Also some computerised machines, try turning off and leaving off for 30 seconds, then turn on and try to stitch, sometimes this will work too.

Go to http://www.singerco.com/accessories/instruction-manuals/search and enter "9940." You can download the manual for free for the machine, which should tell you exactly how to load the bobbin.

It's a good idea to have the user's manual, anyways, and the downloaded one is more complete than the printed one of Singer's manuals in any case.

Good day!

please try this simple tips:

Good day!

A sewing machine operator can often help themselves when their machine does not operate properly.
Here are some simple instructions, which if properly used can save time and mechanics service calls.
TROUBLE;UPPER THREAD KEEPS BREAKING;
This could be trouble;================Do this;
1.Top tension to tight================loosen tension 1 turn
2.Machine improperly threaded=========check threading
3.Thread twisted on guide post========"
4.Thread twisted out of tension======="
5.Take up spring bent or broken=======Check action of spring
6.Thread jumped off pull off finger===Check threading
7.Needle bent or burred===============new needle
8.Bad cone of thread==================try another cone
TROUBLE;LOWER THREAD KEEPS BREAKING;
1.Bobbin tensionspring to tight=======Loosen tension slightly
2.Bobbin threaded wrong===============check threading
3.Bobbin wound to tight or uneven=====try new bobbin
4.lint or thread on bobbin case=======clean inside case
5.Lint or thread inside hook==========clean inside hook
6.Bobbin case nicked bent or burred===check/change case
TROUBLE;MACHINE STARTED SKIPPING STITCHES;
1.Needle bent or burred===============change
2.Needle set in crooked===============Check
3.Thread jumped off take up spring====check threading
4.Thread jumped off pull off finger===check threading
TROUBLE STITCHES SHOWING LOOPS;
1.Forming loops on top of cloth=======Tighten bobbin tension
======================================or loosen top tension.
2.forming loops on bottom of cloth====Tighten top tension
3.Bobbin placed in case incorrectly===remove and replace
4.Bobbin thread slipped from under====check threading of
tension===============================bobbin case
5.Lint or thread in top tension=======clean between tension discs


Thank you and good luck.