I have a sewing machine and I'm trying to make a blanket, but the needle broke so i put in a new needle in, and ever since then, the sewing machine has been makeing a clunking noise and the thread keeps breaking. What do I do?
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the needle position is up tight in the holder and no where else
the cut away bit of the needle faces the bobbin case hook and the groove in the needle faces the end of the machine and gives clearance for the thread to pass through the material
from your description and what you did, the needle /hook timing needs adjusting as it is out
turn the machine over by hand as in sewing and watch the position of the eye of the needle and the bobbin case hook
just as the needle starts to move up, the hook should be just above the eye of the needle at the edge of the needle
The adjustment is by loosing off the screw on the vertical shaft at the end of the machine that is attached to an arm that moves the needle up and down and move that bit up or down until the needle is positioned correctly to the hook
tighten up the screw
next is to check the needle tension is not too tight
workshop manuals are available on line in pdf version or take it to a sewing machine repair shop for a proper diagnosis
Have you installed a brand-new needle? Usually, a bent or damaged needle will make strange noises. You can probably open the bobbin area and hand-rotate the handwheel and watch the needle action. Could be the needle/hook timing is off and the needle is nicking as it lowers to pick up the bobbin thread.
I'm wondering if you have the flat side of the needle in correctly. If your bobbin assembly is in the front of the machine, the flat side should be towards the back. Also, check to make sure your needle is ALL the way up in the needle clamp.
Are you sure you put the correct type of needle in? Normally, if you have any problem, cleaning and oiling will fix it. It sounds like you either didn't tighten the needle screw or you put the wrong type of needle in.
A blanket stitch is traditionally done with a large needle and wool to a folded edge of fabric and is often done about 1cm wide, most sewing machines can't swing the needle this wide or take the heavy gauge thread you need for the blanket stitch effect, its a hand done thing.
Try the process of elimination. Take out the needle, take off the needle plate, take out the bobbin case. Run the machine. Does if run full speed? You might have to let the machine run for about 5 minutes. If it runs slow or you hear it slow down, you might have a bad connecting link between the needle bar and the main shaft counter weight. They seize up sometimes. (Shop Repair).
It may be as simple as you didnt get the needle pushed all the way up in the needle bar. Get new package of needles and try a new needle and make *sure* it goes up as far as you can push it. the reason I suggest a new pkg of needles is if one is bad in the pkg, they are probably all bad. If that doesnt fix it then the needle bar timing/height is off and need to be repaired/adjusted by a tech.
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.