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Loopers are out of time

Looper timing is not right and i am looking for a picture or a manual showing or describing on how to give it the correct timing so the threads will create the loop, thanks.

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  • mickey10 Oct 04, 2008

    Me too the loopers keep hitting each other or missing a stitch

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  • Sewing Machines Master
  • 1,388 Answers

What make and model overlocker do you have ?

Posted on Apr 24, 2008


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I need to know how to setting the looper timing on my Juki MO-655 serger. I don't have time to chase down a repair guy. Costume rush job.


Search the internet. There are web sites and videos that show machine timing, although adjusting a serger may a bit more challenging.

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Oct 16, 2016 | Juki Sewing Machines

2 Answers

My Jancome 7933 will not make any stitches


Try installing a brand new needle.

Sergers are very finicky and if they are not threaded absolutely perfectly, they will show their attitude.

Remove all the thread from the machine. ALWAYS Raise the Presser Foot and rethread from the beginning. Make sure to thread each thread in the correct order (usually, upper looper, lower looper, then needles). If you don't get the threads in the proper order, it will most likely not work. Be sure that the thread paths are correct for all threads. Give each thread an extra little tug when going through the tension disk to make sure it is seated completely. Pull all the thread tails under and out the back side of the presser foot before beginning to stitch. Set the tension disks to the midway point between high & low number (this is the factory standard, although each machine may require some adjustment).

Test your machine and hopefully you will get a chain stitch.

Also, if a thread breaks or comes unthreaded, it is usually best to unthread totally and rethread from the beginning.

If that doesn't work, it is most likely a timing issue where the needles & loopers are not arriving at the correct time to connect. Probably requires service.

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Jul 21, 2016 | Sewing Machines

1 Answer

I have rethreaded machine a number of times to try and solve problem however I cannot make sense of instruction 11 the correct and incorrect position showing hook on page 14


If you thread needle before loopers, there is a very real danger of trapping the needle thread under lower looper thread...it will then be unable to stitch
ALWAYS thread loopers BEFORE needles to avoid trapping.
To see what happens, thread needles first... then wind one revolution by hand....then thread loopers... see where lower looper thread has now surrounded the needle thread so it cannot be pulled off looper !!
For future questions just ask for "BargainBox" via this link

http://www.wix.com/i08870/justask

Glad to help.

Cheers

Martyn

Bargain Box Fabrics

Oct 29, 2011 | Janome Memory Craft Compulock

1 Answer

My serger doesnt make any stitches at all. I have been going through this book for 3 years and I cant get it to work


Has it ever chained off since you bought it? If you purchased it second hand it is possible that the timing of the loopers is out and this will prevent a chain from forming.

However, I'll go through general overlocker/serger troubleshooting for threading up. The critical things are to thread it exactly as the diagram shows, some sergers have a diagram inside the front looper cover so its easy to refer to when you are working on the machine. Or use the manual diagram. There is a sequence you need to follow in threading up, usually upper looper, lower looper, then the needles. This is important. Then you pull all four threads under the raised pressure foot, lower the pressure foot, and start to stitch and hopefully a chain forms. If you need to change a thread you can knot on a new colour, turn the tension to zero, then pull through the new thread. Pull the knot right through the looper eyes but you will need to cut the knot out and thread the needles with the new colour once you get there. Then turn tension back to the normal setting (5 usually) and again pull all threads under the foot.

The timing of the two loopers to the needles is critical to a stitch forming though so if you have tried everything and aren't getting a result; then perhaps its time to take it to a service centre, get it checked out and if it works fine for them, ask for a quick demo of threading up, then do it yourself with the demonstrator watching.

Overlockers are very different to sewing machines and there is a learning curve but once mastered, they are so quick and give a great finish.

Oct 08, 2011 | Singer 14SH654

1 Answer

How do I oil my Janome 664d overlocker


Does your overlocker have a threading diagram on the inside of the front cover? Often this will also show a couple of red dots where you need to oil.

Obviously always best to consult the manual if you have it; I haven't been able to find an image of the threading or oiling diagram for your machine.

If it doesnt have this diagram and you don't have a manual then I would hazard a guess and say that you need to oil the loopers where they move through another metal part. So open up the front and have a look at the lower looper mechanisim, manually turn the flywheel to move the looper and you should be able to see what I mean. The lower looper will move back and forwards through a metal socket piece and the looper bar may look lubricated on each side. So give the metal holding bit a drop and the oil should work into it. There may be a similar looking bit for the top looper, have a look and give it a drop of oil.

Some overlockers will have an oiling point at the back of the sewing table, it may be a little hole marked with red paint.

Sep 06, 2011 | Janome MyLock 644D

1 Answer

I have just been given a huskylock 341. The tension is off. How do I correct this?


Have you used an overlocker before? If not, I'd suggest that you obtain a user manual for it as they are completely different to a sewing machine and at some point you will need to rethread it. You can purchase one from here
http://pages.sewing-machine-manuals.com/173/PictPage/3923709707.html

This machine makes three and four thread seams, which is a combination of two needles and two loopers. For the three thread seam you can use either the left or right needle which gives you different sized seams. For the four thread you use both needles, one goes through the middle of the seam and the other is on the left side securing the seam. tally_girl_70.jpg On most overlockers you are able to move the cutting blade too and this will reduce or increase the amount of fabric being trimmed from the right side.

This page http://sewing.about.com/od/sergersoverlock/ss/serger.htm will give you some general information on sergers/overlockers too.

So adjusting tension is a matter of changing the tension on the top and lower looper threads to close up against the cut edge, or moving the blade over to make the seam a little wider or narrower. You may also need to finess the left needle tension so that the seam doesn't pull apart, I always test serge two layers and then pull open from the right side and see if the needle thread is showing (it will show a little bit but you dont want it so loose that it pulls open. Only tighten the needles in very small increments though, as you'll break threads and needles if you turn them up too tight.

Hard to explain without seeing what your machine is seaming now. But as a rule of thumb, start with all four tension dials (or 3 if doing a three thread seam) on 5. If the tension dials are correctly calibrated then this should give you a pretty good seam. You may wish to lengthen the stitches, I usually work with stitch length of 2.5 (same as your sewing machine stitch length) Stitch length will be a dial on the right side beside the flywheel or in front of the blade area. The blade adjustment should be a little knob near the blade area too. There will be a lower fixed blade and a moving upper blade which sits against the lower one, they work like scissors to trim the fabric. So to adjust the blade, you will need to take the pressure off the upper blade, then wind the knob to move it left or right.

Different weights of fabric will behave differently on the overlocker so you do need to adjust tension for each new project. For example, if seaming a jersey knit you'd use a four thread seam, this gives elasticity and strength and you can join two garment pieces with this seam. You'd probably make a 6mm or 7mm wide seam, the left needle will secure the fabric and the loopers will encase the fabric smoothly while the right needle secures them and gives extra strenth to the seam.

But on organza for example, I would make a very narrow three thread seam using the right needle as the organza will roll inside the overlocking if you cut the fabric too wide.

And on something like curtains I would neaten the edge with a wide 3 thread seam using the left needle to get a very wide seam, the fabric wont roll so you'd need to loosen the two loopers a little to smoothly encase the cut edge.
tally_girl_71.jpg For example, on this image above you can see that the looper threads are laying a little off the edge of the fabric in places, particularly the lower looper, (the side that looks like Y's where you can't really see the middle needle thread), so I would tighten the lower looper about .5 on its dial, then test again.

I hope that this makes sense to you, you will need to test serge, and adjust one dial at a time, test again and look at the result, then maybe adjust another thread until you are getting a smooth looking seam.

Sep 05, 2011 | Sewing Machines

1 Answer

I have been using my serger then suddenly it would cut and not serge. I am still unable to thread the "green" right hand threader.


Apparently either you have no needle threaded to lock the stitch or both loopers aren't correctly threaded. You must thread your UPPER looper first (don't know what color yours is), LOWER looper next, RIGHT needle next and last the LEFT needle if you are using the 4 thread overlock stitch. It sounds like you are having trouble with your lower looper. Look for the lower looper threader to help you thread it. Your manual should show you a picture.

Aug 10, 2010 | Kenmore 16622 Mechanical Sewing Machine

1 Answer

My white 2000 serger is dropping the thread on the first needle when I sew with it- the loopers, both upper and lower are working correctly in conjunction with the "right upper" needle. I have changed...


Could be as simple as poor quality thread (not using MaxiLock thread), the needles not inserted properly (the left is slightly higher than the right), a missing stitch forming pin on the needle plate, the needle bar being too high or a looper timing issue.

As the needles raise, the upper looper should move to the right with the right needle tip slightly above the eye of the looper.

Jul 19, 2009 | White Sewing Superlock 2000 ATS Mechanical...

2 Answers

Threading a bernina serger


Here is a little jingle to remember as far as the order of threads to thread...
Upper looper, lower looper, left needle, right.
Usuall if you give numbers to the threads from left to right as 1,2,3,4 , you would thread it in the order of 3, 4, 2, 1 . Also when threading the loopers be sure the lower looper thread goes over the top of the upper looper thread as it goes out the back.
Hope this helps.

Sep 02, 2008 | Bernina 1008

1 Answer

No stitches 925D.


Probably your looper timing is off. This is common, and just a necessary evil of sergers. Their tolerances are tight.
The operation of creating a serger stitch is a succession of thread grabing and delivering. One looper grabs a thread and delivers it to the needle and so on.
To check this, turn your handwheel slowly and check to see that the upper looper is meeting the lower looper by passing very close to the indented part at the back of the lower looper (indented part is called the scarf, this is where the looper threads form a lock) If not, it's the looper timing. If they seem to meet properly then check your needle. Is your needle up into the needle clamp all the way? Try a new needle. Even a slight bend to the needle will not allow the loopers to meet and grab or deliver thread. You might check the tensions. Thread has to have some resistance in order for the loopers to do their job,

If your looper timing is off, find a sewing repair person to retime the serger. Don't try it yourself or put this repair off. If the loopers go further out of timing, they might hit something and replacement can be costly.

Nov 18, 2007 | Brother 929D Mechanical Sewing Machine

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