Question about Singer Quantum XL-1000 Computerized Sewing Machine

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Tensioning problem While sewing a straight stitch, the tension for the bobbin does not hold. Eventually the underside of my sewing project gets large, loose loops. I have repeatedly tried to re-adjust it through the on screen menu, but it does not hold.

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  • ncgiang Jul 25, 2008

    I have the same problem. I wonder how to adjust the tension of the bobbin's thread ? Also, I'm interested to learn how to oil the Singer Quantum XL-1000



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When thread loops appear on the bottom, the problem is the tension in the top thread. If the bobbin tension was too loose, the loops would be on the top side of the stitching. This is true for all machines, whether mechanical or electronic.

Make sure you always follow these steps when threading the XL1000:

  • The presser foot must be UP
  • SNAP the thread into the first step of the thread path. Hold the thread taut with both hands as you pull it toward the front. You will feel the thread as it locks into the tensioner.
  • Be sure the needle is the right type and size for the fabric being sewn, that it is not dull or barbed, and that it is inserted correctly into the needle clamp with the flat side toward the back of the machine.
If you have threaded properly and still have problems, there may be bits of lint or other debris caught in the thread path or interfering with the thread sensor inside the machine. You can take the top cover off to see. Turn the machine off, and unplug the power cord.

There are 5 screws on top and two at the back right that have to be removed. Do NOT remove the small screw by the bobbin winder. Keep track of which screws go where as you remove them so they can be replaced properly. Lift the handle while the cover is pulled up, out, and away from the machine. It may have to be gently rocked a bit to work it free from the left side. Remember this when putting the cover back in place.

Use a good strong light so you can clearly see down inside. If there are any bits of thread or excessive lint, they should be removed. DO NOT poke anything metal inside. I use a bamboo skewer (from the kitchen). While the cover is off you can also add a tiny drop of oil to the areas directly over the needle area where metal moves against metal. Turn the balance wheel slowly to find these points. Use only name brand SEWING MACHINE oil and always use it sparingly. NEVER use household lubricants -- most are paraffin based and if used they will cause a gummy buildup that eventually binds the machine rather than lubricating it.

Replace the cover - remember to lift the handle to get it in place. Make sure the two little prongs at the top of the narrow front panel on the left front of the machine (where the thread goes down and back up) are placed in under the top cover before putting all the screws back in.

Plug the power cord back in, turn the machine on, re-thread, and run some test stitching. If you still have the same problem after going through these procedures, it may be time for shop service.


Posted on Aug 27, 2008


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2 Answers

My thread keeps bird nesting on the bottom of my fabric what am I doing wrong? What are the correct settings for a straight stitch?

Is your bobbin threaded correctly? You should be able to pull out the thread slowly while feeling it very slightly holding back. It should not pull out easily or quickly.
Could be something wrong with your tensions, try adjusting the upper tension first by starting at the middle setting and working gradually higher and then lower till you get a neat even stitch.

Nov 29, 2015 | Sewing Machines

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My stitch is set on 4 for length and tension is on the red lines touching. Yet it is gathering instead of straight stitch. Why?

Your tension is most likely too tight. Loosen the upper tension and retest.

Re-thread from the beginning. Make sure the presser foot is RAISED before threading the upper thread. This insures the tension disks are released and the thread will seat properly.

The ideal tension is when the upper thread and the bobbin thread meet in the middle of the fabric, but there should not be any puckering. Tension disks can eventually come out of adjustment so the red lines on your stitch tension may no longer be accurate. The tension will also need to change depending on the needle, thread, and fabric of the current project. Upper tension is not static. It needs to be changed to fit the project and a sewist should become comfortable with adjusting the tension for successful sewing.


Nov 19, 2015 | Sewing Machines

2 Answers

How to adjust the bobbin tension.

According to the manual, you should not need to adjust the bobbin tension (and I located other sites which stated the bobbin tension cannot be adjusted on this machine). Apparently, all the tension adjustment is accomplished through the upper thread::
"EN Thread Tension Upper thread tension Basic thread tension setting: "4". (1) To increase the tension, turn the dial to the next number up. To reduce the tension, turn the dial to the next number down. A. Normal thread tension for straight stitch sewing. B. Thread tension too loose for straight stitch sewing. Turn dial to higher number. C. Thread tension too tight for straight stitch sewing. Turn dial to lower number. D. Normal thread tension for zig zag and decorative sewing. Correct thread tension is when a small amount of the upper thread appears on the bottom side of fabric. Lower thread tension The bobbin tension has been set correctly at the factory, so you do not need to adjust it. Please note: - Proper tension setting is important for strong seams. - There is no single tension setting appropriate for all stitch functions, thread or fabric. - A balanced tension (identical stitches both top and bottom) is usually only desirable for straight stitch construction sewing. - 90% of all sewing will be between "3" and "5". - For zig zag and decorative sewing stitch functions, thread tension should generally be less than for straight stitch sewing. - For all decorative sewing you will always obtain a nicer stitch and less fabric puckering when the upper thread appears on the bottom side of your fabric. 1 A B C 22 D"

Doing further research, I found this statement on a machine review site:
"After reading reviews online from where I've bought my drop-in bobbin machines, I think many of the negative reviews are due to the bobbin thread coming up without laying across the bobbin. It can cause the stitches to look very sloppy and no amount of tension adjusting can fix the stitches."

There are several machine review sites wherein 4423 owners stated their disappointment in the 4423's performance. Some said the machine failed almost immediately and others said the machines developed problems when sewing heavy fabric.

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Underside stitch on Janome myStyle22 is looping rather than straight

see if pulling on the bobbin thread while holding bobbin helps add tension

Mar 26, 2015 | Janome Sewing Machines

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Keeps making a nest on underside of what i am sewing, changes stitching from loose to tight on its own, right now needle wont even come down to sew

I had a similar problem and it turned out to be a wisp of thread caught in the tensioning disks. Once I got it all out, no more problem, yea!

Feb 14, 2015 | Sewing Machines

2 Answers

Bobbin unthreads my needle and will not sew

Try changing the needle to a new one, size 12, a dull or bent needle will cause this.

Jan 28, 2015 | Sewing Machines

1 Answer

I'm sewing a zig zag stitch and the underside is a perfect zig zag and the upper side looks like it should be the can I fix this so that the beautiful zig zag is on the top?

FIRST > Make sure your bobbin case is threaded correctly...

For normal straight sewing the top tension should be around 5, for zigzag or satin stitch you need to lower your upper thread tension a bit. Try it at 4, if it still pulls your bottom thread to the top try it at 3 etc...

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Model 7467. bought in april and it was working. now top and bottom threads will not form "stich". it is threaded correctly! took off face plate - nothing jamming up. machine made a clunking noise...

try changing the needle
check the top thread tension
check to make sure the bobbin is inserted in the bobbin case correctly
check to make sure the bobbin case is correctly inserted into machine

Sep 30, 2010 | Singer Confidence 7467 Mechanical Sewing...

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It's very possible the bobbin is in upside down and the thread is coming out of the lower tension. Pull on the thread and the bobbin should turn counter clockwise if it is correct . If it turns clockwise, flip the bobbin over , put the thread through the lower tension and try it again. The topside stitch is loose either because the lower tension is loose(or non-existent) or the top thread is too tight.

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