Question about Janome MyLock 644D

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Threads fine, lower looper breaks after serging three inches

I have a Janome 204D MyLock...I am able to thread it fine, and it serges the first three inches but then somehow cuts the lower looper thread...I have no idea what I am doing wrong, have followed the instruction manual and it keeps cutting the thread

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Tight for thread in loower looper

Posted on Jan 22, 2009

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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

Right hand needle comes un threaded. sews fine for about 5-10 inches then i hear a small clunk sound and the thead breaks near the needle. Thanks for helping me. I just spent over $100 because the far...


Many times you can get a small burr on the tip of the lower looper and it will break one of the needle threads. Run your finger nail off the tip of the lower looper, all around, and check for a snag as your finger nail slides off the tip of the looper. You can get some very fine sand paper 600 grit and gently rub on the back side, top, and bottom tip of the looper. Never the front side of the looper. Try serging again and see of that doesn't help.

May 03, 2011 | Janome MyLock 204D Mechanical Sewing...

1 Answer

Lower thread breaking on lower looper ( green code) It won't sew over seams breaks everytime I rethread it


has the cone of thread at the back got caught up? this sounds like your thread is being caught and not feeding freely through the tension guides. Check the thread cones are okay and that the thread is pulling freely off the most right hand cone (lower looper). Also this thread dial should be set to the same tension setting as the next dial to the left for the top looper. Other possibility is that the tension disc itself has become gummed up or dirty with thread lint or dirt. Turn thread dial to zero and clean between the discs be rubbing the selvage edge of a piece of fabric between the discs gently. Now return tension to 5 or normal setting and try again.

Mar 28, 2011 | Janome MyLock 204D Mechanical Sewing...

1 Answer

The lower looper keeps breaking thread


Hi,...if the lower looper thread is breaking before you sew six inches or more then I suspect a threading problem.When the lower looper thread breaks, You MUST unthread the needles before you thread the lower looper. Thread the looper and then rethread the needles.

Hope that helps,
Doug

Aug 05, 2010 | Simplicity Serge Pro SW432 Mechanical...

1 Answer

Have lost my manual for mylock 204d, want another one.


Hi,

You can download the complete instruction manual in PDF format by clicking this link.
  • You'll require Adobe PDF Reader installed on your computer to view the manual. If it is not already installed on your computer, download it free from: http://get.adobe.com/reader/
Hope this solves your problem. Thanks for using FixYa.

May 10, 2010 | Janome MyLock 204D Mechanical Sewing...

1 Answer

Letture leaf edging


From "Serge With Confidence" by Nancy Zieman:

Set the machine up for a 3-thread rolled edge. Normal width; length 1 - 2.

Use Woolly Nylon in the loopers & regular thread in the needle.

Lock or disengage the cutting blade.

Guide fabric along the right edge of the presser foot.

Stretch and equal amount from fron to back while serging.

Lower the differential feed, if available to about 0.6.

Serge at a slow to moderate speed.

Practice with scraps first.

After serging, gently stretch & release the fabric edge after serging.

Apr 01, 2010 | 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

Janome left needle thread breaking CONSTANTLY


Sounds like a tension problem. Your machine should have two tension adjusters. One for each needle. The book that came with your machine will tell you how. Another possibility is a bent needle.

Feb 27, 2009 | Janome MyLock 634D Mechanical Sewing...

1 Answer

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

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

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