Question about Janome MyLock 634D Mechanical Sewing Machine

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Serger my new serger will not sew I can't turn the handwheel all the way it gets stuck when the needle is down .

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With the door open, the needle plate removed and no threads in the machine, slowly turn by hand one or two revolutions & take a close look at the motion of the loopers and the needle/s, are they colliding, or is the needle becoming jammed by the black guard surrounding the lower looper ?

Ensure there are no threads or fabric debris jammed anywhere.

If it is "new" and under warantee, it would be worth a call to the dealer asking for their advice and see if they will take a look at it for you........arrange to meet with the technician if possible.

Posted on May 30, 2008

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The needle has got stuck and does not come up when the handwheel is turned counter clockwise.


I would take it to the Sewing Shop. You've probably damaged whatever the needle has wedged itself into ...plus the needle and maybe the mechanism that drives the needle up and down.

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I just brought home a Juki 8700. The needle went down and now I can't get it basck up. There is thread stuck in the bobbin. How do I get the bobbin casing off


Cut the thread above the needle eye and rock the handwheel back and forth sharply to cut the thread with the sewing hook. If that doesn't work pretty promptly, undo the needle clamp and turn the handwheel, which should raise the needle bar. Then get into the bobbin case area and try to remove the bobbin case, cutting any threads you can. Keep rocking the handwheel and trying to pull out the needle (pliers help!), and eventually everything will loosen up.

Next, clean and lubricate the area under the needle plate and the shuttle, and reassemble. Put in a brand new needle, right way around and fully up in the machine. Load the bobbin case with a well-wound bobbin, and rethread the top of the machine and you should be good to go.

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Sounds like your needle is hitting the needle plate instead of going through the tiny hole down to the bobbin. Try using the handwheel slowly and watch. Or perhaps the needle is hitting the bobbin case. Something has been knocked off the straight I think. Has your machine been dropped or dmamaged?

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I bendt my needles, and after changing them it wont sew. the threads just come out without getting sewn together.. just 4 straight threads..


Once the thread breaks, the serger usually has to be re-threaded - all four components of the serger.

Raise the antenna to it's highest position.

Open the tensions to zero.

Turn the handwheel so the the loopers are at their highest position. Some sergers have a mark on the handwheel that aligns with a mark on the side of the serger for this step.

Thread according the the sequence indicated on the threading guide - this is either on the inside of the door or on the serger.

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Four needles or four thread (two needles and two loopers)?


Raise the antenna to it's highest position.

Raise the presser foot.

Set the tensions at zero.

Turn the handwheel so the loopers are at their highest position. There may be a mark on the handwheel to match with a mark on the side of the serger for this step.

Thread in the sequence shown on the inside of the serger door.

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The 774 is a very nice serger. Take the needles out and turn the handwheel and listen for the noise. Put two NEW needles in and listen for the sound. If it isn't right, take it to a repair person before the problems escalate.

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your needle bar has been pushed up and is out of adjustment. You need to take off the side cover, there should be a screw on the back of your machine holding it on. Remove this screw, and remove the cover.You may have to remove the light assembly to reach the screw on the needle bar. Once you can see the needle bar, rotate the handwheel until you can see the screw on the needle bar. Loosen this screw SLIGHTLY until you can turn the needle bar. Hold and rotate the needle bar back and forth as you push down slightly. This will lower the bar.Lower it about 1/4 inch. Adjust the needles by turning the bar so that they are straight across. Tighten the needle bar screw so that the bar doesn't move. Turn the handwheel to see if the threads will be picked up. If not, adjust until they are. Tighten the needle bar screw tightly,reinstall the side cover ,and tighten the screw. Change your needles.Rethead and sew.
sewman7

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