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Re: bobbin case and threading singer 6423
This machine has a black plastic bobbin case. You drop the bobbin down into the case with the thread coming off in a clockwise direction. If you look close you will see a slot in the bobbin case where there is the metal pieces. The thread will slide into that and as you pull on it it will work its way through and come out on the other end of the metal. Lay the thread over top of the bobbin case and turn the handwheel to pick up the thread. (make sure you close the slide plate)
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Your tension adjuster is either set incorrectly or needs repair. Bobbins also have a tension setting, though it is not often necessary to adjust them. If they do, it's usually done by turning a tiny screw a very tiny amount. Best to mark the original location of the screw so you can reset it if need be.
Clean out all the thread, clean the bobbin case area thoroughly, a soft brush is good for this, as lint buildup can cause jamming. Set the upper tension around 3 or 4, and try turning the hand wheel slowly to see if the upper thread picks up the bobbin thread properly. If not, adjust the tension again. If you cannot get it to make a nice even stitch, the tension adjusting mechanism may be in need of repair.
singer has some free manuals Go to the singer website
Go to the home page
Go to customer service--click on it--it will show a small menu--click on instruction manual
In the box put the model number (example 117) & click search or try youtube
I'm guessing it's probably the same as mine (8280). This is what the manual says: "Hold the bobbin case with one hand, insert the bobbin so that the thread runs in a clockwise direction. Pull the thread through the **** and under the finger. Hold the bobbin case by the hinged latch and insert into the shuttle." It's hard to describe, but if you've sewn before, it should come back quickly. To be more specific, hold the bobbin case in your left hand, insert the bobbin so the thread is coming up from underneath, pull thread through the **** and into the part where the hole is. If you slide the thread around, it will fit into the slot in there. Pull the latch out and insert it into the shuttle.
The timing mechanism is likely off. Take off the plastic bobbin case and see if the eye of the needle, on its way up, is just below the metal hook that catch the thread. If not,open the bottom cover with a flat screwdriver, loosen the two 2 mm hex screws, push out and disengage the gears. Adj the hook position by turning left or right so that it is right above the eye of the needle when the needle is on its way up. Tighten the hexes. I also give my machine a good old job with a high grade geese on the gears and light old drop on all moving parts before I close the cover. Have fun.
These machines are timed by belt and go out of time a lot. Check and see that when the needle passes through the plate and travels upward 1/8" at this point the rotating hook should be right behind and above the eye in the needle,my guess is that it is out probably 1 tooth on the timing belt and can usually be corrected by removing the bobbin case and holding the rotating hookk with on ehand and forcing the handwheel with the other hand which will cause the belt to jump a cog and should put your machine back in time I hope this helps
pull the bobbin case out by pulling tab or flapper forward (outward toward you) and take bobbin out of bobbin case, If bobbin has thread and that it is coming off bobbin free and is not hung up on bobbin case.
let me know if this helps you, email@example.com