Question about Janome MyLock 634D Mechanical Sewing Machine

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Janome MyLock 644D

Does my serger have a self-threading lower looper?

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Re: Janome MyLock 644D

Yes, the model I used had a self threading lower looper. Just put the thread into the guide and flick the switch

Posted on Jun 11, 2008

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The tread from the lower looper is not being picked up by the upper looper how o i fix this?

Best advice would be to consult your owner's manual. The most common serger problems are caused by incorrect threading or not threading the threads in the proper order. With most sergers, the upper looper should be threaded first. The lower looper is threaded second and the lower looper thread tail should drape OVER the upper looper. Then thread the needles.

Be sure when threading that each thread is pulled snugly into the tension disks.


Nov 15, 2015 | Janome MyLock 644D

1 Answer

Do you have a picture fo threading the janome 644d serger. and my stitch is not right.

There are good instructions in the book. Do you need that to help? I have a PDF if you need I can email it. chrisatcentralsewingdotcom 25081632-ejanej2jom3nxm54rtob2gnh-4-0.jpg

Sep 08, 2014 | Janome MyLock 644D

1 Answer

My janome mylock 644d threads are continually breaking, have threaded the machine correctly, will sew for a few centimetres and then thread breaks. Any suggestions?

If you have not already done so, try changing your needles. Sometimes the needles will be slightly bent or dull and cause thread breaks. If this does not help check your tensions. These should be set somewhere between 4 and 6 generally. If one is far out of this range, try resetting it. If you try both these things and still have trouble, it is likely that your machine is out of time. In this situation it would be best to take your machine to a reputable sewing machine repair shop for repair. Retiming a serger can be very difficult for a novice, and can be quite and unpleasant and tedious job, best left to a professional who is well versed in serger repair.

May 01, 2014 | Janome MyLock 644D

1 Answer

My Janome 204d Serger won't form a chain stitch. It is threaded correctly. I have changed the needles??

I would suggest that you check the needles again, make sure they are both fully up into the needle housing. Also they should be at different heights in order to form the stitch sequence.

It is important that you thread the loopers first in the sequence shown in your manual, then the needles. So you may need to recheck the threading again and make sure the threads are in all the eyes correctly, especially the lower looper. Also some overlockers, have a sliding eye on the lower looper for ease of threading, if yours does, make sure it has been slid back to normal operating position.

When you have checked the threading up, take all four threads under the raised pressure foot and make sure that the upper looper thread and lower looper threads are not crossing over each other. Lower the pressure foot and try to chain off again.
I hope this helps you to resolve the issue.

Oct 11, 2011 | Janome MyLock 634D Mechanical Sewing...

1 Answer

I cut the chain thread by mistake, how do i get it back? Am new to this

Rethread the machine. Do the loopers first, then the needles. If you ever break a looper thread, you have to undo the needle threads, rethread the looper thread and then rethread the needles.

Apr 22, 2011 | Janome MyLock 644D

1 Answer

How do i uses a janome Mylock 534 or mylock534D for sweing? I cant even seem to thread the thing correctly, when ever i thread the mashine it only stiches for about 3 cms. must have the needles unthreaded any time you re-thread the loopers. So thread the loopers and then thread the needles and see if you have better results.

May 06, 2010 | Janome MyLock 644D

2 Answers

I bendt my needles, and after changing them it wont sew. the threads just come out without getting sewn together.. just 4 straight threads..

Once the thread breaks, the serger usually has to be re-threaded - all four components of the serger.

Raise the antenna to it's highest position.

Open the tensions to zero.

Turn the handwheel so the the loopers are at their highest position. Some sergers have a mark on the handwheel that aligns with a mark on the side of the serger for this step.

Thread according the the sequence indicated on the threading guide - this is either on the inside of the door or on the serger.

Mar 14, 2010 | Janome MyLock 644D

1 Answer

MyLock 634D won't serge

Check that your lower looper is actually threaded and not tangled with the upper looper (needle thread) when it moves. I wish they'd include pictures in the manual how to lay the thread.

Apr 05, 2009 | Janome MyLock 634D Mechanical Sewing...

1 Answer

My serger

Self threading is perhaps not exactly correct, however there is a guide with an armature to release the guide to enable easy access........have a look in you manual

Also take a look at this image and move the lever to use it.....all will be easier to see with the needle plate off ....until you become familiar with the operation


Nov 09, 2007 | Janome MyLock 634D Mechanical Sewing...

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