Question about Singer Quantum 9940 Computerized Sewing Machine

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HOW DO YOU GET TO THE AREA IN THE MACHINE TO CORRECT THE TIMING

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Unless there is an access area either directly under the raceway or an access point behind the raceway on the body you will have no option but to take the body apart which is a major task in itself.

Posted on Jul 01, 2009

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Posted on Jan 02, 2017

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My top thread is getting tangled up in the bobbin case area, even when hand turning the wheel with the bobbin and case removed; trying to fix a serious tension problem.


First, install a brand new needle.

Remove the thread from the machine. ALWAYS RAISE the presser foot and rethread from the beginning. Verify the thread path is correct and that the bobbin is loaded and threaded correctly. Set the top tension to the midway point--you'll probably need to tweak the tension for your particular machine.

Bring the bobbin thread to the top of the fabric (manually with the handwheel). Then gently hold both thread tails in your left hand while you begin to slowly take the first couple of stitches.

If you are still getting thread barfs in the bobbin area, your machine may be out of time. Search for sewing machine timing or take it for service.

Understanding Thread Tension Threads

How and Why to Bring up the Bobbin Thread

Mar 12, 2017 | Sewing Machines

1 Answer

My Juki LU-563 stopped picking up the bobbin thread, changed needle, took out bobbincase to look for thread, none, still won't sew because of bobbin thread not being picked up.


If you've properly installed a brand new needle that is correct for the machine, threaded it correctly, checked that the bobbin is installed correctly and the bobbin tension threaded properly, most likely the machine is out of time. In other words, the needle is arriving at the bobbin at the wrong time in order to intercept the bobbin. (You can open the bobbin area, hand rotate the handwheel and watch how and where the needle moves in relation to the bobbin to see where and why it is not connecting.) You can search the internet for web sites and videos that discuss machine timing or you can take it for service.

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Nov 09, 2016 | Juki Sewing Machines

1 Answer

Cleaned out lint from bobbin area and bobbin thread is still bunching


Try these suggestions
1. Change the needle--use a needle that's for the fabric being sewed
2. Rethread the machine--top --make sure to use every thread guide
3. try a different bobbin--make sure bobbin is inserted correctly into the bobbin case
& make sure the bobbin is turned the correct way in the bobbin case
4. make sure the thread has not come off the thread take up lever
5. Clean under the needle plate & in the bobbin area for lint or threads
6. Check to make sure the bobbin is not warped or damaged
7. Make sure the bobbin case is correctly in the machine,, if it's a top loading bobbin you may need to have the bobbin case checked to see if it's damaged or see if the hook and hook race has a problem
8. Also could be a timing problem, and the machine would need to be checked.

Jan 29, 2014 | Janome Sewing Machines

1 Answer

Thread presser foot juki serger


try a new needle
rethread the machine top and bobbin
make sure the bobbin is not warped or damaged
make sure the bobbin is inserted in to bobbin case correctly
clean under the needle plate and in the bobbin area for lint
if the problem still happens,, then it would be a good idea to have the machine checked for a timing problem

Sep 28, 2013 | Sewing Machines

1 Answer

Bottom thread bunches


try changing the needle
rethread the machine top & bobbin
clean under the needle plate & in the bobbin area for lint or thread
make sure the bobbin is inserted correctly into the bobbin case
if none of these suggestions help then it's possible that the machine is out of time & needs to be serviced

May 18, 2012 | Singer Sewing Machines

2 Answers

Singer5050 sews a little then jams top thread in pieces in bobbin area


Start from the begining.
Use your Instruction Book and make sure the machine is threaded correctly.
Put in a new needle.
Adjust the top tension to about halfway.
Fit a fresh wound bobbin that does not have all sorts of different threads still wound on it(a bad habit with a lot of people).
Make sure the bottom tension is correct.
Make sure the bobbin is fitted corectly.
Set the machine to do basic straight stitch(mid range stitch length).
Try sewing and see if the problem is solved.

Apr 19, 2012 | Singer 8280 Mechanical Sewing Machine

1 Answer

I am having trouble getting my singer 6199 sewing machine to sew. The top thread will not pick up bot thread. I tried changing needle, changing bobbin, rewinding bobbin, rethreading machine & bobbin,...


did you get the needle in correctly--all the way up into the needle holder
& the flat side of the needle goes to the back of the machine

also after you check the needle & it's in correctly it's very possible that the machine is out of time & a sewing machine repair technican would have to retime the machine

Mar 01, 2012 | Singer Sewing Machines

1 Answer

Why won't the bobbin thread pick up?


have you tried changing the needle? if it's a new needle is it inserted correctly---flat side to the back of the machine---needle push up in inside the needle holder
have you tried cleaning under the needle plate & in the bobbin area for lint or loose threads?
have you checked the bobbin to make sure it's not warped
have you checked the bobbin is inserted correctly?

if you've already tried these things then the last thing that possible is the machine is out of time & needs to be serviced by a repair shop that have the correct tool to time it

Aug 29, 2011 | Brother XL-2600

1 Answer

Kenmore Sewing Machine Drop-in Bobbin Tension Adjusting Problems


looped stitches are usually caused by improper tension. when the loop is on the upper side, it may be corrected by loosening the top tension or by tightening the lower tension (turn the tension screws on the bobbin a hair at a time)

since using the machine only a few times it is best to clean the machine from dust (can use a can of air) blow air into the bobbin area and between the tension disks and under the throat plate.

make sure the machine is threaded correctly and bobbin is evenly threaded

Aug 26, 2009 | Kenmore Sewing Machines

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