Question about Singer Izek Computerized Sewing Machine

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Thread Tension and Timing trouble

The upper thread tension device on my machine is not functioning. One of the discs used to place tension on the thread appears to have come loose. Also there seems to have been a very slight slip in the timing, only noticible when performing very wide stiches. Are either of these problems things that I might be able to repair myself? Can I get parts somewhere if I need them? I wish I could just take it to someone who knows what they're doing but no one on the island does sewing machine repair and shipping it out would cost a fortune. Thanks in advance for your help. Dawn

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  • MarjieB Aug 19, 2008

    I have a similar problem, the tension was causing the thread to break after 6 inches of sewing. I played with it for a while and was able to get the thread to stop breaking but it still stops after 6 inches and says there is a problem with the upper tension. I did find a place to take the machine but they want $95 dollars just to look at it and no gaurantee that it would come back fixed. Hate to buy a new one this one was a great little machine for the money. I don't consider sewing machines disposable...



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Remove the bobbin and its holder, the thing they go into is called a race. it picks up the needle thread to make a loop with the bobbin thread to make a stitch. sometimes you can manually turn and adjust the race with your fingers, probably needs to go to the right. replace the bobbin and holder and with the fly wheel manually insert the needle to see if it picks up the bobbin thread. fly wheel is the hand crank on the top right of machine. hope it helps, not sure what to do about tension disks.

Posted on Nov 24, 2008


Buy another one

Posted on Nov 29, 2007


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The tension on my machine is off.I don't know which thread to adjust.bobbin or top thread. on fabric top stitch seems ok,bottom stitch bunches up and is loose.How do I readjust the tensions?

If the thread problem appears under the fabric, it is a top thread issue.

If the thread problem appears on the top of the fabric, the bobbin thread is the issue.

Perhaps the upper thread is not seated completely in the tension disk. Remove the upper thread from the machine, ALWAYS RAISE the presser foot, then rethread from the beginning. Make sure the thread path is correct. Test your stitch.

If the thread is still looping under the fabric, the upper tension is too loose. Set the upper tension to the midway point. Test and adjust the tension until it is where you want it. Preferred tension is when both threads meet in the middle of the fabric.

sewing machine tension Google Search


Oct 29, 2016 | Sewing Machines

1 Answer

Needle stitch fine. Bobbin stitch loops.

First, try a brand new needle.

Second, consider using a better quality thread. By all means, AVOID old or bargain bin threads. Coats & Clark used to be a standard, but thread quality has improved over the past few years, so you may want to check out other brands like Aurafil, Superior, Isacord, etc. Also, cotton wrapped polyester thread releases thread lint that contributes to build-up of gunk in the machine. Some sewists have noted that they experience more sewing issues when using C&C threads. However, some machines will do better with certain thread brands than others, so some experimentation may be beneficial.

Third, check the stitch on your sample again. Generally, when thread loops appear on the underside of the fabric, it is the upper thread that is the problem. If loopy threads appear on the top of the fabric, it is the bobbin thread that is the issue. You can even use a different color in the top to help distinguish which thread is the problem.

Fourth, when threading the upper thread, Always Raise the Presser Foot during the threading process so the tension disk is released and the thread can seat properly. "Bird nesting" occurs when the thread is not seated in the tension disk.
Sewing Machine Thread Bunching Up Here Why

Birds nest under the fabric big loops of thread top side looks good...

Fifth, when the upper thread appears on the underside of the fabric, the upper thread tension is too loose. If the bobbin thread appears on the top of the fabric, the tension thread is too tight (or the bobbin thread is loose). Start out with the upper tension set at the midway point and tweak it from that point. The tension is ideal when both upper and bobbin threads meet in the middle of the fabric.

Also, remember that tension is not static--a tension setting for chiffon will most likely not work on cotton or denim. Get comfortable adjusting the tension to suit the project you are sewing.


May 24, 2016 | Sewing Machines

1 Answer

How do I adjust the tension?

Set our machine's upper tension dial somewhere around the midpoint (between the lowest & highest number).

RAISE the presser foot and then rethread the upper thread from the very beginning. (The tension disks are released when the presser foot is raised allowing the thread to seat properly.) (When testing tension, it helps to use different color threads in the bobbin vs the top thread so you can see how it is sewing.)

Sew a test on the fabric you will be stitching. The ideal tension is when the upper thread and bobbin thread meet in the middle of the fabric. If the bobbin thread is appearing on the top of the fabric, the upper tension is too tight and needs to be loosened. If the upper thread is appearing under the fabric, the upper tension is too loose and needs to be tightened. Righty-tighty and lefty-loosey!


Nov 19, 2015 | Sewing Machines

1 Answer

Harrision gc5550. Why is bottom stitching loose?

Usually, loose threads under the fabric indicate a loose upper tension. Be sure that you RAISE the presser foot BEFORE threading the upper thread. This allows the thread to seat properly in the tension guides. If the loose threads are still appearing under the fabric, try tightening the upper tension. The upper and lower threads should meet in the middle of the fabric.


Sep 18, 2015 | Sewing Machines

1 Answer

Brother 1034d serger skipping stitches. Stitches are loose even when adjusting the tension.

It appears that there are two issues: skipping stitches, and, loose stitches. Let's deal with them individually but first some general points to check.
1. Change both needles for completely fresh ones out of the package. Make sure that they are inserted all the way up, this is very important. The right needle should appear longer than the left one. Make sure also that you are using the correct needles for your serger.
2. Use a good quality thread with very little stretch, almost no fuzzies, and in pastel colour. Dark thread ages quicker, therefore has a shorter shelf live. A good quality sewing machine thread is also acceptable.
3. Make sure that the tension dials are clean and free of lint or other debris.
4. Re-thread the serger in this order, keeping the presser foot in the down position at all times
a) Upper looper. Ensure that the thread is securely embedded inside the tension discs. Place the thread tail under the presser foot to 11:00 o'clock and place the presser foot down again
b) Lower looper. This is the difficult one to thread but make sure that all the thread guides are properly threaded as well as the upper looper elbow. Check that the thread is lodged between the tension discs. Once the lower looper eye is threaded, place the thread in front and over the upper looper and then under the presser foot to 11:00 o'clock and place the presser foot down again.
c) Right Needle. Thread the right needle path, again ensuring that the thread is between the tension discs. Place the thread tail under the presser foot to 11:00 o'clock and lower the presser foot.
d) Left Needle. Proceed as with left needle.
e) Double check that all tension dials have their respective threads embedded between the discs by pulling firmly up on each thread above the tension dials.
f) Check that the stitch length is set to between 2.5 and 3.0, differential to normal, blade position to middle, blade is engaged, and upper looper converter not in use.
g) Set tensions to recommended setting for 4-thread overlock.
g) Make a test stitch out. How is it? Still having the same issue/s?
If yes, continue with the items listed below, otherwise have a great time serging.

Skipping Stitches:
1. Check that the looper tips are smooth. Burrs will cause problems.
2. Check that the needles match the type of fabric being sewn.

Loose Stitches:
1. Double check threading.
2. Debris caught between tension discs will also manifest itself in loose stitches. Take an 8" X 6" piece of medium weight clean and lint free cotton fabric, fold it in half length-wise and pass the fold only firmly between the tension discs from top to bottom (with the presser foot up and no thread in the tension dials).

Re-thread and test stitch. How is it now?

Sep 30, 2014 | Sewing Machines

1 Answer

How to adjust tension on lervia sewing machine

Tension is a balancing act between the upper tension and the bobbin tension. Balanced tension (which is not always necessary) is when the two threads meet between the layers of fabric. Not all unbalanced stitches are a tension problem. You can have loops under the fabric from a failed take up lever, improper clearance between the positioning finger or even a burr or lint. First I check the upper tension. If you can not make the upper tension normal pinching the thread after it comes off the spool will act as a tension device. If this solves your problem then start with cleaning.

You may have lint between the tension discs at the top next to the take up lever. Clean this out with the presser foot up. Next install a new needle size 80 and thread the machine. When you lower the presser foot and pull the thread the spring steel the needle is made of should bend 1/8 of an inch at normal tension. Between 3-5. If this does not happen turn to a larger number on the tension assembly. If this does not deflect the needle as you pull the thread to the left rear of the machine your tension assembly needs repair or replacement.

The bobbin tension is controlled by a spring on the bobbin case or bobbin basket (depends on the sewing machine). This spring can also get lint under it. The lint can hold the tension discs open causing no tension. This may be the problem if you see the lower thread pulling up to the top of the fabric. Normal tension on the lower thread is usually 150-200 grains. That may not mean much to you and you may not have a scale to measure that. One simple trick is to take a wooden clothes pin and glue 3 pennies to it. I then use this as a weight to set the bobbin tension. I clip the clothes pin to the thread and set it on the work bench. Next raise the bobbin case or bobbin basket without touching the thread or bobbin. Then tighten the tension screw on the bobbin case until the clothes pin lifts off the work bench.

This gives you a good place to start on balancing the tensions. Set up a straight stitch at the mid range of 2-3mm long and sew. Turn the upper tension dial to the mid range 3-5 and observe the stitch. If the bottom of the fabric shows too much top thread tighten the upper tension. If the top of the fabric shows too much lower thread loosen the upper tension. I recommend playing with your tensions to learn what too loose and too tight a tension look like. Sometimes we want the upper tension really loose to do a basting stitch. If you want to pucker (gather) you can create a long stitch and play with the tensions. A tight upper tension will pucker thin fabric. You can also gather fabric manually by using a long stitch and a loose upper tension then bunch the fabric together on the loose threads.

After all that it may be easier to take this to your local dealer and ask for advice.
Have a great day and keep on sewing.

Jun 22, 2014 | Sewing Machines

4 Answers

How do I tighten the stitch when the loop coming down around the bobbin thread is loose?

Hi there, there are a number of possible issues/solutions if your top stitch is loose 1. check to make sure it is actually in between the pressure discs on the tension's sneaky and will sometimes jump out to the front or the back but look like it's still in place. 2. Loosen the bobbin tension, sometimes even if the top is loose, you can counter that with a more loose bobbin tension. 3. Check the spring in the tension dial. PAY ATTENTION TO HOW THINGS COME OFF,THEY HAVE TO GO BACK ON IN REVERSE ORDER...With that being said, twist the knob counter clockwise until it comes off, then check the spring to see if it is damaged or if the 'spring' in the spring has gone on vacation. While you're there, clean all the bits with a clean dry cloth. Some threads are bonded/coated and leave a residue behind that can affect tension. 4. Another option is to wrap the thread around the tension dial twice, you may have to loosen the tension at that point ...just a bit at a time. 5. Make sure it is threaded properly, you may have missed something along the way (I am notorious for that, even though I've been doing this for a few centuries), the thread broke, or came out of the needle, it may have undone itself further back than you realized. That's all I've got, hope something helps, good luck.

Jun 12, 2014 | Juki DDL-8700

1 Answer

Tension manual thread

You sound like a very experienced seamstress. Are you inquiring about a serger or a sewing machine. Work with one tension at a time. Is it the upper thread that is loose when sewing on a sewing machine. The bobbin controls the upper thread and visa versa. Set the tension dial on the sewing machine to zero and work from there slowly. Perhaps the tension discs are not controlling the thread any longer. I hope this helps. Kate

Feb 04, 2014 | Brother NX-400

1 Answer

Bottom thread is loose and loopy, have tried new needle, thread, cleaned out bottom, tension adjusted.....nothing works, can you help. I see many others have same problem but i cannot see an answer

When your bottom thread is loopy it means that the UPPER thread is not properly threaded. First make sure your needle has the flat side to the back of the machine and that it's the right size needle for your machine and the fabric you're using. You probably missed the tension discs when you threaded the upper thread. Make sure that your presser foot is up and that your needle is in the uppermost position. Try re-threading it and when you get to the tension discs pull the thread back and forth so you hear a little snap. That tells you that your thread is being placed in the discs correctly. (This also cleans out your tension discs in case there's lint in them.) Make sure that you tension dial is on about #4. Finish threading and you should be good to go. Thanks for using FixYa!

Aug 26, 2010 | Elna Heirloom Edition 6005

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