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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  • Anonymous Mar 16, 2014

    The overlocker was working fine, but suddenly stopped. The light is still on but the machine does not respond to the foot pedal any more. Not sure if the pedal has failed or if there is any function on the machine which can enable or disable the pedal?

  • Anonymous Mar 16, 2014

    Just bought this Janome MyLock 644D used. I'm sure it is threaded correctly now, but I cannot run a chain and it is not sewing or overlocking. Needles just punching holes in fabric and thread is bunching up on its own. How can I resolve this problem?

  • S Y M
    S Y M Apr 20, 2014

    You probably missed the loop for the green under the feed dog. You will need a flashlight to see it. That should fix your problem. Refer to your diagram on the machine.



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  • 4 Answers

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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Related Questions:

1 Answer

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

2 Answers

Thread 1 keeps snapping

Is it possible the thread might be too old? If so, it might tend to break easier than normal. Also if it got wet.

Jan 03, 2018 | Janome MyLock 644D

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

Retiming Mylock Serger 234D

Ooh, I've heard it is difficult timing a serger because there's more involved than a sewing machine.

You can try looking at videos and web sites:

serger timing Google Search

Nov 16, 2017 | Janome MyLock 634D Mechanical Sewing...

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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