I just purchased the machine from a local business and they suggested a nipper however it is cumbersome to use when it would be easier to have a thread cutter attached to the outside of the machine.
Try contacting JUKI customer service about the thread cutter
SOURCE: thread constantly wraps around spool pin
Cut a round curcle of fabric the size of the spool from a piece of felt. Put a hole in the middle and put it under the spool of thread. If this does not work you can purchase a small net that fits over the spool. It is designed to keep the thread from coming off the spool except for being pulled through naturally.
Hope this works.
Zelma
SOURCE: juki ddl-227 industrial machine
Before all else. Turn off machine!
(1) break screws on the hook loose.
(2) tighten one back up very skightly, one you can reach when the needle bar is at its lowest position.
(3) lower needle bar to its lowest position.
(4) loosen the screw just tightened.
(5) position the tip of the hook behind the needle hole. the tip should be as close to the needle hole as possible without actually touching the needle
(6) tighten screws
(7) slowly hand turn the machine (depress the foot pedal to disengage clutch brake on motor) several revolutions to make sure the needle doesn't hit anything on the hook.
(8) if it passes this test, try on a scrap of fabric
SOURCE: threading juki DDL-227 machine
There is a free download threading diagram for the DDL-227 here:
http://www.sewusa.com/Threading_Diagrams/Threading_Pages/Juki_Sewing_machine_threading/Juki_552_553_555_227_Threading_Diagram.htm
SOURCE: skip stitch
The three most obvious causes (other than that of the machine possibly being slightly out of time) are:
1) Too small of a needle size - increase the size.
2) A needle that has a flaw / defect - change the needle.
3) Needle not inserted correctly, either not pushed all the way up into the needle bar, or not installed facing the correct place. On this machine, the small "scarf" in the needle (an indent just above the eye) shouldface the right side of the machine.
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