First clean bobbin case loosen thread tension screw and clean under tension spring, hi pressure air is the best. its important to clean under tension part because material builds up and does not allow the flat spring to put the proper pressure on the bobbin thread. tighted tension (second screw) accordingly. all thread tension depends on thickness of goods being sewn. the heavier the good the more tension u need on top.
SOURCE: One of the thread tension plates is loose on my
Hi there 1st of all i like to say please change the rusti tension plates, otherwise its not moving well & the boobin does not follow the alinment. For humidity control i suggest you fix an air condition system in your working room & make the place clean & dry. Thanks & waiting for your feedback.
SOURCE: Hello, I have a juki DDL 5550, runs great, But the
Soulds like your not geting the top thread all the way in the tension disk. Make sure you have the presser foot up when you thread the machine. also after you get it treaded check to make sure you have tension, with the presser foot up you should have not tension and with it down it should be very hard to pull.
hope this helps
SOURCE: I have a Juki DDL 227. Top thread keeps breaking instantly
Well, you've not checked "Everything" but you have checked the common things.
Do you have any idea of where it is actually breaking? Re-thread your machine and see if you can determine exactly where the break occurs.
Sometimes a damaged needle throat plate will break threads... as will a burr on the hook in the bobbin area. Also if there is a burr or rough spot on the thread spool it will sometimes catch and cause breakage.
Good luck
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