20 Most Recent Janome MyLock 644D Questions & Answers

You may download a copy of the manual here.

Janome MyLock... | Answered on Jun 09, 2019

Does it have another plate for rolled hems?

Janome MyLock... | Answered on Mar 01, 2019

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

Janome MyLock... | Answered on Jan 03, 2018

tight for thread in loower looper

Janome MyLock... | Answered on Jan 25, 2017

No double needle on a serger. It takes separate needles.


Janome MyLock... | Answered on Sep 20, 2016

You may not find a DVD but you might find a manual:

Search the internet for:
Manufacturer + Model + the word "Manual"


Janome MyLock... | Answered on Dec 05, 2015

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.


Janome MyLock... | Answered on Nov 15, 2015

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.

Janome MyLock... | Answered on Jul 04, 2015

the serger needs to be checked to see why it snapped out of place. there not suppose to do that.

Janome MyLock... | Answered on Jun 14, 2015

Check the needle timing as it may be hitting the bobbin case or hook

Janome MyLock... | Answered on Apr 12, 2015

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

Janome MyLock... | Answered on Dec 04, 2014

Search the web and put in modrl number. .....234d manual free....and you will see a pdf

Janome MyLock... | Answered on Aug 28, 2014

You should be able to download a manual from this web site.

Janome MyLock... | Answered on Aug 25, 2014

Try this site. Enter the 3 character key displayed and press download. It should open as PDF file.

Janome MyLock... | Answered on Aug 08, 2014

try Janome, use the link and ask them if they have a free one Janome Contact Us

Janome MyLock... | Answered on Jul 08, 2014

contact Janome website customer service and ask them if they have one
Janome Contact Us

Janome MyLock... | Answered on Jul 08, 2014

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.

Janome MyLock... | Answered on May 14, 2014

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