Question about Juki MO-644D Mechanical Sewing Machine

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BLADES DON'T MEET ON OVERLOCKER

UPPER BLADE WON'T MEET LOWER BLADE ON MY COOPERLOCK 4DS. HOW DO I POSITION IT CORRECTLY?

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Hi there
please see link to download user manual for JUKI MO-644D
http://www.juki.pl/support/HSM/Manuals/MO-654DE_manual_UK.pdf
and you must made upper and lower knife very close to cut material correctly.
regards
ASHRAF
CAIRO - EGYPT
aabozid@hotmail.com

Posted on Jan 08, 2014

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What is the tension settings for normal over locking with the Elna 4de


First of all ensure that the serger is threaded correctly.

The two setting which you mention are really a 'range' for an 'average' setting.

Using 'average' fabric such as a medium weight cotton, flannel, etc.; set each of the tensions in the middle of the range and test the stitch. There may be minor adjustment required to get a perfect stitch.

Once you have stitched that first sample, here are some possible minor adjustments required:
1. Tear-drop shaped loops on the underside: Check that the thread is firmly set in the tension dial by giving the needle threads a good snug pull above the tension dials while the presser foot is down.

2. The zig-zag like thread on top should meet the ziz-zag like thread on the underside right on the fabric cut edge. If the meeting happens on top: reduce the upper looper tension slightly and increase the lower looper tension slightly ... test sew and recheck. If the meeting is on the underside: increase the upper looper tension slightly and decrease the lower looper tension slightly ... test sew and recheck.

3. If the meeting does happen along the fabric cut edge but the meeting is hanging beyond the fabric cut edge: increase the blade position (that is, move the blade to the right). If the fabric is creating a ridge or tunnel; move the blade to the left slightly.

Please let me know if this has solved your problem. Otherwise let me know what is happening with the stitch quality.

Sep 16, 2014 | Sewing Machines

1 Answer

Overlocker Instructions


Bottom blade should be flush with the stitch plate. The top blade should pass below the stitch plate at the bottom end of the stroke.

Nov 22, 2013 | Baby Lock Sewing Machines

1 Answer

How to set the needle plate setting nob on the janome 504d overlocker


Sorry, From Left to the Right for the blade...then 1/2 turn to offset blade out of the way to disengage....don't forget to put blade back to correct position !!

Nov 11, 2011 | Janome MyLock 644D

1 Answer

Correct settings for 804dsp serger to sew a sweater.


Are you wanting to use the serger to sew a hand knitted sweater together? or do you mean a sweat shirt knit or other knit fabric. If it is the first option, I'd say don't bother, as you can't do it with the blades working because it will cut your knitting and the wool will unravel in the seams.

If it is the second option then I would start with the following settings.

Four thread stitch, so both needles and the upper and lower loopers threaded. Set tension on all four dials to 5, stitch length to between 2 and 3, and differential on zero. Move the cutting blade over to the right for a wider seam. Now test stitch on some fabric scraps double layer and see what the seam is looking like.

Now you want to adjust a couple of things: firstly width of the seam. Is it the size you want? If you'd like it a little narrower, then adjust the cutting blade back a little to the left to narrow the seam slightly - just depends on the fabric weight. For example if it is a loose open weave like boucle you would want a wide seam to make sure it holds the fibres fully.

Now you can adjust the upper and lower loopers to get the thread wrapping around the edge looking nice. Look at the seam and the fabric inside it. Is it tunnelling and pulling up the fabric? if so, release tension on both loopers a half number to put more thread into the seam. Test stitch again and see if the loopers are meeting nicely on the cut edge of the fabric. Upper and lower looper threads should be meeting right on the cut edge so if this isn't happening and one showing on the other side, then tighten the looser one by half a number and test again.

If the threads are hanging off the edge then you have the choice of moving the blade to the right to cut less fabric off, or tightening up the looper tensions to pull in the thread.

That's it, hope this helps you to master your serger.

If you'd like some images and further explanations of other stitching you can do with your overlocker, then Debbie Coswell has some great information on line at www.sewing.about.com, just search "overlocker" to find the specific pages.


Good luck

Oct 11, 2011 | Simplicity Serge Pro SW432 Mechanical...

1 Answer

Bernette 334D overlocker - the edge of the fabric rolls under - can someone please tell me which thread needs adjusting? I only seem to make it worse...I don't think I have ever been able to get this...


I can help you with your 334D as I have the same machine; there is several ways to adjust the stitching width but firstly check the stitching finger position is forward not back for rolled hemming. There is a little lever that is on the side of the cutting plate just in front of the foot and feed dogs, you need to push this forward; this inserts a stitching finger into the needle plate and the overlock seam forms around it. When you pull it back the finger retracts to form rolled hemming where you want the fabric to roll under. So hopefully this is all that is happening now with yours but I'll go through the whole process for clarity and others.

This is how I set up for a new fabric project. Turn the tension dials for all four threads to 5. Your needle tensions should not need to be changed often; perhaps just if from the right side of a seam you can see the needle stitch, you may tighten it fractionally. Stitch length knob on the side by the flywheel should be on about 2 and a half and the differential knob on zero also.

Now you want to adjust the cutting blade position firstly to get the width of seam best suited to the weight and type of fabric you are going to seam. If you are going to use the overlocker to join two pieces of fabric in a 4 thread seam to assemble a garment, then always test with two layers too. And if you are going to just neaten a single layer seam allowance, then test on just a single layer and set up for that.

I'm assuming you are seaming 4 thread but the comments are the same for the 3 thread, you just take out the left or right hand needle first or just cut the thread to that needle and leave it in place to get the 3 thread stitch. (Obviously if you are seaming something delicate like silk, take the unused needle out as it will leave holes in your fabric. Be careful when changing needles, use tweezers to hold the needle right up into the housing and never unscrew the screw too far, just enough to get the needles in and out. And always manually turn the flywheel towards you through a stitch sequence afterwards to make sure you've got the needles clearing the loopers, if you hear them touching, recheck needles are fully into housing.)

If you are seaming something light then you'll want a narrower seam. Have you moved your blade before? If not, you need to turn the needle to the highest point, open the front cover and raise the pressure foot and swing it to the side so you can see better. Now put pressure on the upper cutting blade towards the right to release the spring on it, then swing it upwards out of the cutting position. Adjust the position of the lower fixed blade by turning the knob that is nearby to it. You'll see the blade moving over. Once you get used to making this change, you can just put pressure onto the upper blade to release it with one hand, and turn the knob to move the bottom blade with the other.

If you move it towards the right it will trim further away from your needles giving you a wider seam and if you move towards the left you'll get a narrower seam, ie it cuts closer to the needles. So set it to the position you want depending on what you are seaming. Now relower the upper blade into position, swing pressure foot back into place and test stitch again on fabric offcuts. Take a look at the seam. Is the fabric "tunnelling" inside the seam? if so, release the tensions on the upper and lower loopers by a half increment only. Test again. Repeat process until tunnelling is gone and fabric is sitting flat inside the threads.

If the threads are looping off the edge of the fabric, then increase the tensions on the upper and lower loopers by a half increment only. Test again. Repeat process until the threads are sitting right up against the cut edge, and meeting right on the edge.

That is basically it - please feel free to ask me again for more help is this hasn't been clear or you still struggle with this machine. I presume that you don't have the instruction manual for it so I could scan a page or two if this will help.

This is a really good quality overlocker so don't give up on it; it sounds like you have just never been shown how to use it fully or never had the manual; consider purchasing one from Bernina or online as it is very instructive. If you find that you still struggle with getting the stitch tensions right, its a good idea to spend an hour or two with some calico and thread it up with four different coloured threads like the diagram inside the looper cover, then make stitching samples and adjust until its right. You can make a four thread, three thread wide with left needle, three thread narrow with right needle, 3 thread rolled hem and flat lock. Write down the tension numbers, stitch length and blade position onto the fabric sample and keep these in a note book for future reference. This will help you to remember what you need to change when you want to use that stitch type again.

And my last suggestion, if you can find a good sewing machine dealership or fabric store that runs classes, see if they run one for "introduction to overlockers" - I took a class from the Bernina dealer I bought my machine from back in 1992 and it was fantastic. I've used mine for bridal veils with fishing line, made table cloths, curtains, cushions, sewed dozens of knit garments for the kids and made most of my own clothes with my trusty Elna and this overlocker; its a very strong machine and better quality than many others on the market.

Oct 08, 2011 | Bernina Bernette 75

1 Answer

I have a Singer Ultarlock 14U34 and need to know how to adjust the stitch width.


You can download a manual from this link
http://www.singerco.com/uploads/download/664_14u34b,234b.pdf

Check page 16, changing the seam width is done by moving the cutting blade left or right and using only one needle. So if you want the narrowest seam, use the right needle only, remove the left one, and move the blade as far left as you can. Your manual says to turn machine off at the wall for safety, many overlockers will have a motor cutout when you open the front covers, but its good practice to turn off too. Then you put pressure against the upper moveable blade and swing it up out of the way and make adjustment to the lower fixed blade with a screwdriver in your kit (some overlockers it is a knob you move to move the blade position).

And reverse for a wide stitch, use left needle for 3 thread wide seam, and move the blade far right.

You can also use the 4 thread seam where you use both needles and trim up narrow but the seam will be heavier than a three thread.

Each time you make changes to the amount of fabric being trimmed, you may need to finess the upper and lower looper tensions to ensure the seam is tensioned enough to just meet on the cut edge of the fabric. This is the norm for overlockers, each fabric will behave a little differently so you need to test stitch and adjust a little. Your manual will explain this process too.

Sep 05, 2011 | Singer 14SH654

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

2 Answers

I want to know which knob I use to make the stitching narrower


there are generally two variable controls .. one adjusts the stitch length (distance between stitches measured in stitches per inch) ... the second is stitch width .. that adjusts how far the zigzag moves left and right .. thats usually just a number from 0 to 10 or so .. 10 would be maximum width .. 0 would be used for straight stitch ..
so you need to adjust the stitch width control to make the stitching narrower .. the controls are called different things on different brand sewing machines .. if you have the brand and model number then there may be instruction booklets available ...

Jan 04, 2010 | Sewing Machines

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