Question about Juki MO-644D Mechanical Sewing Machine

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My blades won't cut, they seem to be rolling rather than cutting

It was sewing alright, until I was serging a pair of jeans, & it baulked at the tickness of the side seam, now it won't cut. The blades seem to have slipped

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Check bottom blade,it should be flush with needle plate. when you turn hand wheel by hand the top knife should be even along the length of the bottom one .the top knige is held by a 7 or 8 mm screw [looking straight at you] slacken this ,turn wheel till knife come to bdc and push the top blade against the bottom one. however if the edges of the knives are shiny or worn ,it will never cut. you can buy them relativly cheaply [eastman staples huddersfield is main juki agent].

Posted on Jun 24, 2009

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Posted on Jan 02, 2017

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2 Answers

I have a babylock evolve serger. It serges fine w/o the blade engaged. Once I engage the blade, the stitches don't hit the fabric


most Sergers have a blade adjustment that allows you to move the blade closer to the sewing plate as well as further away sounds like yours may be to close to plate. Open the door to the underside of your sewing machine; their should be a round knob at the base of the blade are. Turn the blade until it moves away from the sewing plate. test and see if you have adjusted it enough so as not to cut your stitching off. hope this helps

Jan 11, 2015 | Sewing Machines

2 Answers

Do I have to have the cutting blades on the machine to serge material? Also, what's rolled hem and whats overlock?


No you do not need the cutting blade to serge but you shouldn't have to remove the blade it you should be able to push the knob at base of blade inward or pull it outward to turn blade downward out of the way.

TUTORIAL - How to do a rolled hem on a serger - StitchCraft

http://stitchcraftonline.com/blog/?p=42 - 71k - similar pages Aug 5, 2009 ... One of my favorite uses for my serger is to do rolled hems. A rolled hem is were the machine folds the fabric under a tiny bit and then stitches it.

Jan 05, 2015 | Sewing Machines

1 Answer

Simplicity SW432 Loops big but even


check the tension settings
change the needles
if these suggestions don't help, then it's possible that the machine is out
of time & needs to be serviced at a sewing machine shop

Apr 25, 2012 | Simplicity Serge Pro SW432 Mechanical...

1 Answer

I have the Janome MO644D. The seam is extending far past the edge of the fabric with really big loops. It almost looks like a tension problem, but I've tried adjusting it, flossing the thread through...


s-l300-pupyr0ualaj20obfvyre1rzh-1-0.jpg I think the right 'finger' on the plate is out too far. You may need to adjust your cutting blades further to the right until your cutting blades are in line with the right finger on the plate. Sometimes I have forgotten that I set my cutting blades for a rolled hem and then went back to regular tensions and plate but forgot to adjust my blades back to regular serging.

Jun 16, 2017 | Juki MO-644 Mechanical Sewing Machine

1 Answer

How do you lower the knife so you don't have to cut through the fabric? I'm trying to serge a waistband in but don't want to cut he fabric.


there should be a cutting blade lock switch that you have to turn, it should be in the area where the stitch length & stitch width are

Oct 26, 2010 | Brother 1034D Mechanical Sewing Machine

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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

Hi! everyone, i wonder if someone can help me out with my overlock willcox & gibbs 515-e32-451. it won`t cut the fabrics, maybe the blades are in a wrong position, so i need to know how to adjust them...


if it can cut even though it seems to be able to reach the blade may be dull, or they may have been put into a rest position, look for a lever when you open up the machine. I'll bet if you look at you tube you find people showing how to do a rolled hem, and for that you have to disengage the blade so you'll be able to see how it gets moved

Feb 07, 2010 | Sewing Machines

1 Answer

My simplicity serger SW432 wont cut


There are 2 blades, a fixed cutter and a moving cutter. The moving cutter should move approx 1/8" at it's lowest point past the fixed cutter. There should also be some pressure between the cutters

Mar 18, 2009 | Simplicity Serge Pro SW432 Mechanical...

1 Answer

I have a juki mo-3614 serger and I can't seem to get the blades lined up right for cutting. It just seems to want to roll the fabric instead of cut it. How do I line up the blades the right way.


first, pull out the bvlades and make surte they are sharp. It could simply be that they are dull. Next, line tyhe bottom blade up level to the surface of the needle plate. The top blade should be adjusted to where it slices against the botom blade. You may have to experiment with the height adjustment on the top blade, assuming you have a suitable cutting edge.

Nov 29, 2008 | Juki MO-644D Mechanical Sewing Machine

1 Answer

Need replacement cutting blades on my simplicity serger easy lock 804


Allbrand.com or go to Google, type in: "Replacement blades for a serger". Hope this will help. I have the same serger. --Tricie

Jan 05, 2008 | Simplicity Serge Pro SW432 Mechanical...

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