The needle goes down into the bobbin casing and breaks off.
I took the plate off and the bobbin casing out according to the books instructions. I saw that when the case rotated, it was not in the proper position. It caused the needle to break. This is a new machine and the timing seems to be off already on the bobbin. It is used in a FACS classroom by many students. We ordered this machine because it was recommended for a classroom environment. It has only been used for about 3 weeks.
Re: the needle goes down into the bobbin casing and...
I don't know if this will work, but sometimes the thread in my machine gets too tight because I hold it in place with a water bottle cap, but then my needle gets pulled too far away from where it is supposed to go, and it bends and hits the bobbin plate, and then it just breaks.
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There is a small plastic plate where the needle goes down through the foot, remove this cover and you will see the bobbin. Remove the bobbin and refill or selecting another bobbin turn it so that when you pull the thread the bobbin turns anti-clock-wise, slip the bobbin into the black plastic casing, pulling the thread towards the small red arrow at the bottom of the casing, slip the thread between break in the silver metal sleeve pulling it to your left between the 2 pieces of metal this is where the tension on the thread is. You have now changed your bobbin. With the plastic plate still off, hold the top thread with your left hand and with your right slowly turn the wheel, this will send the needle (holding your top thread) down into the bobbin casing and will pick up the bottom thread, pull on the top thread and bring the bottom thread up through the hole in the plate. Replace the plastic plate and recommence sewing. Good luck
Oh wow. That's definitely not good. Well you'll need to replace the bobbin case, and needle plate. Even the slightest burr can cause havoc. you could try smoothing down burrs with some fine sand paper but you'll need to replace the case eventually if you can't get this problem identified and fixed.
Next look for a build up or stray threads under and around the needle plate/bobbin area. Make absolutely certain you have the right needles for your machine.
Check that your needle is centred when straight-stitch is selected and / or that you have the correct stitch-plate fitted. Is the needle breaking because it is hitting the stitch-plate or is it breaking when the needle goes down through the slot/hole in the stitch-plate. If you are sewing zig/zag or patterns, you must have a slotted stitch-plate fitted. If it's breaking when the needle passes below the stitch-plate, then take the bobbin /bobbin case out and the hook/shuttle and see if it still happens. If it does, the timing on your machine may be out and need professional adjustment. If it doesn'y happen after removing just the bobbin case, make sure the bobbin case is being correctly fitted.
Are you sure you have got the top thread threaded correctly including the take up lever? Start at the thread spool and follow the thread all the way through the thread path checking that it is not snagging on anything enroute and that the thread is correctly through the tension device. Also tension dial should be on 4-5, if its higher this could be breaking the thread. YOu should not need to adjust top thread tension more than a half increment at any time.
Other possibility is that the bobbin holder under the needle plate has moved out of alignment and then the top thread is catching there as it goes around the hook.
If you check your manual it should give you instructions on removing the needle plate (2 screws need to come out), then you can lift the bobbin case out towards you, clean underneath with your little brush, then reinsert it. There are two little red marks on the right side of the bobbin case and a stopper, these need to be lined up. Then put in bobbin and rethread into tension spring, replace needle plate, bobbin cover, and test stitch.
Hopefully one of the above is causing the thread to break.
A sewing machine operator can often help themselves when their machine does not operate properly. Here are some simple instructions, which if properly used can save time and mechanics service calls. TROUBLE;UPPER THREAD KEEPS BREAKING; This could be trouble;================Do this; 1.Top tension to tight================loosen tension 1 turn 2.Machine improperly threaded=========check threading 3.Thread twisted on guide post========" 4.Thread twisted out of tension=======" 5.Take up spring bent or broken=======Check action of spring 6.Thread jumped off pull off finger===Check threading 7.Needle bent or burred===============new needle 8.Bad cone of thread==================try another cone TROUBLE;LOWER THREAD KEEPS BREAKING; 1.Bobbin tensionspring to tight=======Loosen tension slightly 2.Bobbin threaded wrong===============check threading 3.Bobbin wound to tight or uneven=====try new bobbin 4.lint or thread on bobbin case=======clean inside case 5.Lint or thread inside hook==========clean inside hook 6.Bobbin case nicked bent or burred===check/change case TROUBLE;MACHINE STARTED SKIPPING STITCHES; 1.Needle bent or burred===============change 2.Needle set in crooked===============Check 3.Thread jumped off take up spring====check threading 4.Thread jumped off pull off finger===check threading TROUBLE STITCHES SHOWING LOOPS; 1.Forming loops on top of cloth=======Tighten bobbin tension ======================================or loosen top tension. 2.forming loops on bottom of cloth====Tighten top tension 3.Bobbin placed in case incorrectly===remove and replace 4.Bobbin thread slipped from under====check threading of tension===============================bobbin case 5.Lint or thread in top tension=======clean between tension discs
Have you got the needle in the correct way around - the thread must lie in the groove in the needle. Is the machine correctly threaded? Try release the tension a bit and check that the bobbin tension is not too loose and bunching up under the needle plate. The instructions for bobbin tension setting are:- Check that the thread is tight around the bobbin. Make sure that the bobbin is in the right way around - the bobbin thread should double back on itself coming out of the bobbin holder. The bobbin tension adjustment is the small screw in the plate on the bobbin case that the thread passes under as it comes off the bobbin and goes out. This might not be exactly the same as yours but should give you an idea of the position.
Try inserting the bobbin in the reverse direction. Most machines take a bobbin clockwise or counterclockwise and it can make a difference. Also try a new needle, a bad needle is often the problem believe it or not.
I had this problem when I first bought my machine. I took it in and they told me it was a recall problem. All the machines were having the same problem. They fixed it and I have not had the problem since. I bought mine at a Joanne fabrics. Hope this helps.
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?