Question about Singer 14SH654

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I have a singer Overlock 14SH654 and I cannot get the tension set on the upper and lower loopers. The two threads for the needles seem to work find and when adjusted one way or the other shows the change but the upper and lower loopers never change in appearance when adjusted one way or the other. They sew but the loops are way to loose. Would the differential cause this?

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Yes, it can. What do you have your differential set at? Try it in the middle and see if it makes a difference.1 is usually for overedging, 2 is usually for easing in a sleeve, etc. I have my tensions set at 4,4,4,4, stitch length at 3 to 4. Do not be afraid to try gradually changing the tensions, but do them one at a time, that is what I did and finally got it.

Posted on Mar 17, 2011

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1 Answer

Bernina 335 serger won't sew/overlock. carefully rethreaded the serger but that hasn't helped.


The 335 has a two thread chain stitch (stitch type 401), and the overlock side (right needle side), is a three thread plain overlock. If you are describing the plain overlock as the problem, I would first suggest the following in re-threading:

1. Thread the upper looper
2. Thread the lower looper
3. Thread the needle last (important)

If the needle threaded, you cannot re-thread the lower looper without breaking the thread.
In order to thread the lower looper, the lower looper must pass by the needle thus picking up the needle thread. So, instead of threading the lower looper thread underneath the needle thread, the looper would be threaded on top and cannot sew without breaking the thread.
Make sure that the threads are bedded between the tension disks. Check this by stretching the thread fore and aft of the tension disks as well as visually noting that the threads are not accidentally threaded behind the disks. You can also loosen the tension disks when threading so as to allow the threads to bed deeply between the disks.
Please reply with your observations.

Sep 27, 2015 | Bernina Sewing Machines

1 Answer

Why won't my sl370 work?


Hello Mary.
By the question, it looks like the lower looper is making loops? If so, check that you are using the correct needles for your serger and that the needle or needles is/are inserted correctly:
- needles must be all the way up into the needle shaft
- needles must face with the flat side to the back and the groove to the front
- use at least needle size 12/80, not smaller

Check these few items, if the loops are still not forming:
- re-thread the serger from the start, keeping in mind to thread in the proper sequence (upper looper, lower looper, needles)
- make sure that the lower looper thread lays on top of the upper looper thread and is passed to the back of the serger and then under the presser foot when threading
- make sure that the thread are securely engaged IN the tension assembly
- make sure that the serger is set for 3-thread or 4-thread overlock (i.e. that the upper looper converter is not engaged)
- check all tension setting
- stitch length should be around 2.5 - 3.5

Let me know how it goes.
Happy serging!

May 02, 2015 | Sewing Machines

1 Answer

What setting are the three threads set on for a rolled hem on a singer ultralock l4sh654 and what is the lever by the plate for?


Rolled hemming on any overlocker is usually achived the following way. Right hand needle only.
Blade over to the right usually to cut wider than normal but you can vary this to suit the fabric and stitch width you want.
Thread in this needle and the upper and lower loopers. If you can source any, use woolly overlock thread in the upper looper, this fluffs out when not tensioned and covers the fabric to give the look of solid stitching. Change upper looper tension to about 2 and lower looper tension to about 6 or 7.

The lever by the plate is usually to control the little stitch finger where the stitches are formed, move it backwards and it should move back towards you?? If this happens, then you want it in the retracted (towards you) position for rolled hemming so the stitching is much smaller and the fabric can roll. Normally this stitch finger holds the fabric firm for the loopers to form the stitch over for your normal 3 or 4 thread overlock.

Now test stitch and see how it looks. Tighten the lower looper thread so it lays right beside the needle on the underside. You may need to then tighten or loosen more the upper looper, you want the upper thread to wrap all the way around to the underneath against the lower looper thread and needle.

The cut edge of fabric should roll to underneath inside your seam. Once you've got this happening, turn the stitch length down to 0.5 or so to close it right up tight. This uses heaps of thread so I usually test everything else, then close it up at the end to minimise waste.

Hope this makes sense, good luck.

Sep 22, 2011 | Singer 14SH654

2 Answers

I am doing some sashes for a wedding and i want to know on my serger 14SH654 ultralock how to do a rolled hem


A rolled hem on any overlocker is formed by using the right hand needle only, and the two loopers to form a narrow three thread seam. You also need to retract the seam width finger as Trial2962 said. This is a little finger that sits on the stitching plate and the loopers form the stitching over it. By retracting it, the looper threads can form a narrow seam and in fact, roll the fabric inside the seam. You need to move the cutting blade as far right as it will go so you are trimming as wide as possible from the needle, turn the tension on the top looper rigth down to 2 so it is very loose and this thread wraps around to the underside. And tighten the lower looper tension to about 7 so it hardly shows and sits right up against the needle thread. Adjust and test until you get the seam looking like this, then turn the stitch length dial (on the right side by flywheel) down to 0.5 to close the seam right up tight. Lastly, if you can source it in the right colour, buy woolly overlock thread and run this through the upper looper only, this thread is fluffy and when not under tension, relaxes and "fills" out so the seam appears like a continuous coverage over the fabric.
9_26_2011_11_26_51_pm.jpg
You will need to practice a few runs and go slowly on corners, a curve is obviously much easier to serge than a right hand cover so if you can, cut the fabric with curved ends, much easier to get a great finish. When you chain off at the end, you need to unravel the tail threads and pull them inside the seam for a few mm with a needle to get a smooth finish, then trim the tail and seal with a drop of Fray Stop.9_26_2011_11_26_51_pm.jpg

Sep 04, 2011 | Singer 14SH654

2 Answers

I have a Singer 14SH654 (overlock) and broke the foot piece that is attached to the shaft. I can't find a diagram to identify the part number so I can order a replacement.


Call Singer at 1-800-4singer and they can advise you. They have a website at www.singerco.com and you can download your manual manual for free, kind of nice to have a back up on your computer, plus have the luxury of enlarging the diagrams.Another tip, go to www.sewingpartsonline.com and you can see what your part should cost approximately, plus identify what your part is called. Good luck

Jan 07, 2011 | Singer 14SH654

2 Answers

I have a bernina overlocker and whenever I use it the lower looper (marked in red) thread breaks. How can I fix this? It was serviced yesterday and when other people used it before me it worked fine!


Then it's one of two things. First try setting your lower looper tension on 3 and see if that works. If not set it back on 4 and cut ALL your threads and re-thread the machine STARTING with the UPPER looper, then the lower looper, then the right needle, last the left needle if you're sewing a 4 thread overlock stitch. Make sure the threads aren't twisted in the thread guide. Make sure the lower looper thread is OVER the elbow on the upper looper and over the upper looper thread. Let me know if this works. We'll work until we get it fixed!

Sep 14, 2010 | Sewing Machines

1 Answer

Lower looper problems


Some sergers require they be threaded in a particular order. If not, they do not "knit" the threads.

Raise the thread antenna to it's highest position.

Open the tensions (set at zero). If the tension settings are automatic, raise the presser foot to open the tension settings.

Turn the handwheel so the loopers are at their highest position. There may be a mark on the side of the serger to match up with a mark on the hand wheel for this.

Open the front of the serger and the threading guide should be printed on the inside of the serger door, or on the serger.

Start at the right and note which looper is threaded first and then the needles.

You can find more information and manuals at the Singer Co website.

Mar 24, 2010 | Singer 14SH654

2 Answers

I had to rethread my Singer Ultralock serger and now it won't sew correctly. Best I can tell the lower looper keeps coming unthreaded, but this doesn't happen until I put material in. I have rethreaded it...


I had read where someone said their lower looper tension dial had pulled apart. Sure enough, mine had too. We snapped it back together and Voila problem solved!

Dec 06, 2009 | Singer 14SH654

2 Answers

Mock safety stitch


Sounds like the timing is a little out.

If you remove the needle plate and turn the handwheel manually watch for the lower looper as it swings behind the Left needle....the needles ought to rise by only about 2mm before the looper passes......the looper must pass the needle above the eye to catch the thread, and be so close as to be barely touching the rear of the needles......if the left needle thread is not picked up, it may be the timing, or the distance between needle and looper.

For the uninitiated, there are a myriad of variables in correctly timing an overlocker (serger), and without the manual to refer to the correct parameters, you will rapidly descend down a road of despair....if you move a looper to advance or ****** the timing, you risk looper collision and a broken looper is almost as much as a service, so my advice is do the test to see if the timing is the likely culprit, and if so, take the opportunity to give the old girl a treat.

If you need to save for a while to do it, just use the 3 thread option for the time being.

www.bargainbox.com.au

Apr 26, 2008 | Singer 14SH654

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