Good Luck :)
SOURCE: Bobbin Case
I'm having a similar problem today. I took out the bobbin case and when I went to put it back in, the whole system locks up. I've tired cleaning, changing needle taking the metal plate and piece that holds bobbin case out and put it all back in after cleaning. Nothing. My symptom is I can't get a complete stitch, the needle goes down, the whole deal acts like it will work and as soon as the arm of the bobbin case gets to 8 o' clock on the gears, It jams and won't hardly move. I cannot pull the bobbin case out easily after this. Perhaps there is someone out there that can help us!
SOURCE: bobbin case case keeps jamming
I am having somewhat the same problem with the exception that my needle did not break. I've cleaned and oil, but the bobbin case and projection positioned spring is not communicating to allow sewing to continue. The thread keeps jamming and the bobbin raises up the plate. So, what else am I to do?
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: Installing the hook and bobbin assembly.
The plastic bobbin case should sit on top of the raceway, it should slot in quite easily, once the bobbin case is in put the small metal clip at the top over to hold it in place.
SOURCE: I just bought a used juki DDL 8500 industrial
I just bought the same machine and mine came with a photocopied manual. There is indeed a bobbin winder on the side, there's a flat section on the side of the bobbin winder closest to you, if you push that forward it connects a wheel attached to a bobbin spoke, to the belt that runs between the machine and the motor. To wind the bobbin, put the bobbin on sideways onto the axis of the wheel that is on the inside of the machine, and push the bobbin winder forward.
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