Obtain Juki Industrial User's Manual 8700-7 - Juki DDL-8700

https://www.fixya.com/support/t23830274-programming_presser_foot_lift

It appears the Juki 8300-8700 parts work on the Yamata, so a Juki manual may work for your Yamata.

Amazon com Yamata FY8700 Lockstitch Industrial Sewing Machine with Clutch...

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjQ2r_G5N3YAhUHKWMKHbdlDygQFggnMAA&url=http%3A%2F%2Fgoldstartool.com%2Ffiles%2FJuki-DDL8700-instructions.pdf&usg=AOvVaw35RqT8p23XhY58isfIKx2r

Juki 8700 manual Google Search '

Perhaps a manual would be helpful:

File JUKI DDL 8300N Instruction Manual pdf

You should probably contact the manufacturer with questions. Hopefully, you did some thorough research before purchasing this machine. From the info I found, it appears to be a straight stitch only machine. I don't know anything about this machine, but I would be hesitant to purchase a straight stitch machine for sewing swimwear. Usually, swimwear needs a stretch stitch or zig-zag capability. Just my thoughts...

Amazon com Juki DDL 8700 Industrial Straight Stitch Sewing Machine Arts...

Juki DDL 8300N Industrial Single Needle Lockstitch Sewing Machine with...

JUKI DDL 8300N Straight Stitch Industrial Sewing Machine With Table Lamp...

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try these links for a manual

http://www.sewingmachinery.com/juki/Juki-DDL8700-instructions.pdf


JUKI DDL 8700 Instruction Manual

https://www.juki.com/bookstore/products.php?product=DDL%252d8700-Instruction-Manual

Juki DDL 8700 Parts

JUKI DDL 8700 User Manual Instructions Book in PDF format

Have you tried cleaning it? Sometimes a piece of thread or some fuzz gets in between the parts and causes friction. If you have a manual, or can get one online, you should walk through the pages on cleaning and do each and every part of the cleaning. If that doesn't work, call a professional. There are service people who come out to your shop and work on industrial machines. Mine charges $55, plus parts if needed.

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.

Dear Maciej
good day to you
regarding error E11 please see attached photo.
best regards
ASHRAF ABOZID
CAIRO - EGYPT
[email protected]

this might be it , though hit should be apparent to you if you look under it
JUKI DDL 8700 Instruction Manual Installing The Belt Adjusting The...

machines do not just go out of time. Is the top threaded correctly. did u miss threading thru the take up arm or take up spring change needle too.

There should be a bobbin winding device next too and slighlty behind the drive belt.

Should be like this bobbin winder.