Question about Juki MO-644D Mechanical Sewing Machine

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I bought a second hand Juki industrial machine , model DDL 5550-7, but struggle to get the tension of the stitches right. where do you set the lower stitches tension

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Upper tension sets the lower thread tension (upper thread is what you see on the underside of the fabric). Bobbin tension is for the thread you see on the top of the fabric

Posted on Jul 08, 2009

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You set lower stich from upper tension nob

Posted on Oct 04, 2012

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As soon as I put on a zipper foot the tension on my ddl 5550 loosens. when I put on the regularfoot its fine. anyone else having this issue?


The 'shank' on your zipper foot is too long and is holding your upper tension open. When I get a rogue foot like this, I set my old foot and my new foot, side by side on a flat surface and measure the height from the surface to the bottom of the hole where the foot is screwed onto the presser bar. When I see how much difference there is, I mark it and take my Dremel and cut the hole lower on the new foot. This will usually fix the problem. The only other thing you can do is to adjust the height of your presser bar to accommodate the zipper foot but now it won't fit your regular foot so you have a new problem. :)

Aug 01, 2015 | Juki DDL-5550 Industrial Straight Stitch...

1 Answer

Error code E3 45786 on Juki sewing machine motor


I could not find that error using the Manual that is on the Internet.
I suggest you call or email their Sales and Service in the U.K.

Their email is sew-europe@btconnect.com

JUKI DDL 5530 DDL 5550 Parts Needles Service

Feb 16, 2015 | Juki DDL-5550 Industrial Straight Stitch...

1 Answer

My Juki DDL 5550-6 machine is not turning on. How do I fix this?


HI Gina
did you please check power source coming to power switch or No ? one more thing , please let me know which control box model you are using then i can send to you photo for fuses place to check maybe one fuse burned and need to replace.
thanks and best regards
ASHRAF ABOZID
CAIRO - EGYPT
aabozid@hotmail.com

Feb 09, 2015 | Juki DDL-5550 Industrial Straight Stitch...

1 Answer

How do I know that machine is in working condition ddl-5550


A little more information please. I have this model, and it only does a straight stitch and reverse.
Have you turned it on and tried sewing on it? Is the oil pan dry? Has it been serviced at all, or maintained?
We can't help you without more info.

Oct 15, 2014 | Great Plains Ind. Juki DDL-5550 Industrial...

1 Answer

How do I stop my Juki DDL-8700 machine from skipping stitches?


set up on quilting table? wheres the oil pan?? if your machine sews fine straight and skips on curves i think you are lifting the presser ft as you make the turn. theres nothing wrong with the machine. you could always change the needle which is always the first thing when you encounter a sewing problem.

Oct 08, 2014 | Juki DDL-8700 Industrial Straight Stitch...

1 Answer

Juki cp 230


check the tension of the belt.

Sep 02, 2014 | Juki DDL-5550 Industrial Straight Stitch...

1 Answer

My wife broke several needles on her Juki DDL 555 machine and I need to know how to adjust the timing as she put a new needle in and the point was damaged


First thing to check is if you've got the right needle system: http://partsbooks.sewingmachine.com/Instructions/Juki/Industrial/DDL-5550%20&%205530%20Instruction%20Manual.pdf and that the needle is correctly oriented... the scarf has to be precisely set.
The next things I'd check are the stitch cycle -- hand crank the machine through the normal stitch cycle and see what's hitting. Then fix that. I've got my suspicions this may be a needle bar height adjustment. Don't thread up for this test... misthreading can also cause the needle to hit something and break, so start with the fewest possible variables first.

Feb 18, 2014 | Juki DDL-5550 Industrial Straight Stitch...

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