I have a 2011 Juki DDL-8300N. Has always worked fine but while sewing on denim it suddenly seized up and stopped sewing. The needle is in the lowest postion through the jeans. I am unable to turn the

SOURCE: Juki 8300N

Dear Rosemarie,

Make sure you have threaded the machine from right to left, it sounds like the needle thread is trapped under the lower looper thread and cannot form a stitch.........start the threading over from scratch like this:

1. Lower Looper
2. Upper Looper
3. Left Needle
4. Right Needle

SOURCE: problems when sewing over heavy jean hems

Are you using the correct type of needle? have a word with your needle supplier and explain the problem. Different threads and different thickness material need different top and bottom tension adjustments.
Can I suggest sew one thickness material at a time with tension adjustments for that thickness. Then change the tensions and do a batch of thicker material.

SOURCE: Juki 8300N

i had a machine, that the belt was slipping, and the tension was set too high

SOURCE: Juki Sewing machine DDL-555. After 4-5 hours use feed not moving

Sounds like as the machine builds up friction from extended use, some vital part is lacking lubrication and is seizing up. A good service person will remove ALL of the covers and thoroughly air clean and oil every moving part. Sometimes these dry points are hard to find and patience is required.

You can get a sewing machine oiler with a long applicator and put a drop of oil on anything that moves, but over oiling can be messy.

SOURCE: I own a Juki DDL-8300N industrial sewing machine,

Hi,

I do understand sometimes the manuals do not give a complete picture. Check out these videos that I have posted bellow. They show how to set it up.

http://vimeo.com/14428186

Please accept the solution if it's helpful. Do get back to us for any further query.

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