Bottom stitch keeps getting tangled up after needle change
The needle broke when I was shortening jeans. I replaced the needle, seemingly without any problems. Now, when I sew, the stitch looks fine on the top, but when I turn over the fabric, it's a tangled mess on the bottom. I've redone top and bottom thread 3 times and don't see anything wrong with it. Please help!
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Re: bottom stitch keeps getting tangled up after needle...
Sounds like the needle has hit the hook.Open the bobbin area door, remove the bobbin and bobbin case. The swing the two lugs that hold the hook retaining ring to the side so you can remove the hook. CAREFULLY inspect the sharp tip of the hook. It will be sharp and 'chisel' shaped. ANY marks, scratches or burrs on the hook must be removed carefully with 180 or 400 grit 'wet and dry' abrasive. It must be as smooth as a 'babies bum' !! If you are not confident, take it to someone to do it for you. The hook is expensive, so don't mess it up!
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a lot of machines struggle with denim because it is such a heavy and dense textile. Many domestic machines won't stitch it at all due to this. Things you can try however:
Denim needle, this has a deeper groove at the back and is a heavy gauge needle, or use size 110 if you don't have denim needle.
Bash the side seams with a hammer in the area you will be stitching, to soften up the fibres.
Use a seam jumper, this is a piece of plastic to put in back of the presser foot as you approach a cross seam to help keep the presser foot pressure even across the fabric. Sometimes called a "thingy-a-jean" or similar.
Don't bother trying to use the heavy gauge yellow jean thread unless you put it through the bobbin and sew with the right side down. But even then, many machines can't handle having this heavy thread underneath and the regular 50 cotton on top, my Janome 1600 won't do it.
put your machine on slowest speed if you have a variable setting and turn the flywheel to assist it through the heavy side seams.
Personally, I never bother with the twice turned hem on denim if shortening, I just overlock the raw edge, turn up 1 cm and stitch around in a matching blue thread so it is seen as little as possible.
I'm guessing it is because the tension is not just right, the bobbin might not be the right size, the thread type top and Botton might not be the same, or you just might need put in a new needle the right size.
since a needle broke, & a new needle was put in, was the needle inserted correctly, normally flat side to the back of the machine, & pushed all the way into the needle holder rethread the machine top & bobbin make sure the bobbin is inserted correctly into the bobbin case. if none of these suggestions help, then it's possible that when the needle broke it could have caused the machine to jump time & would have to be checked at a sewing machine shop
You may need to increase the foot pressure to cope with the heavy denim material. Look carefully at the material as the machine tries to stitch ... if the foot is not keeping the material firmly on the stitch plate, it might be riding up on the needle (denim tends to be rather 'grippy') which will prevent the thread loop being formed correctly below the stitch-plate and therefore not getting picked-up by the CB hook. Changing to a bigger diameter needle might actually make the situation worse in this case ... go back to an 80 and try again.
try a new
ball poine needle. Sounds like intermittantly not picking up the bottom thread....It doesn't take much to shorten the needle just a hair to cause this, especially with sharps. Try a ball point needle...The last longer and are more durable. I sew everything with a ball point. Top Thread will also break if the top tension is too tight. Remember, when adjusting tensions, baby steps all the way...just a lil' smidgen might be just what you need. Also, always make certain the machine is level so that the settings don't vibrate out of adjustment. Dusty Tread will also brea easy. Keep threads clean and dust free. Good Luck
I turned up my husband's jeans using a size 100 needle. You can get easy thread needles that have a small gap in one side that you slide the thread through. There is a good way to turn up jeans and keep the original hem without having to cut them. Have a look at this site http://www.daciaray.com/?p=38
First, open the needle plate and make sure the bobbin area is clean and free of lint and thread.
Check the needle to make sure it is not bent and is properly inserted into the holder - usually with the flat side facing to the back of the machine.
Refer to your manual for bobbin insertion to be sure the thread is feeding from the bobbin in the correct direction and through the proper guides.
Always thread a sewing machine with the presser foot up. This opens the tension control and allows the thread to properly enter.
When the foot is down, the tension control closes to the sewing setting and if the thread is not in place, there is no tension on the thread and it gets loopy.
After threading, lower and raise the needle while holding onto the thread tail. This will pull the bobbin thread up through the needle plate. Take hold of both threads and take them under the presser foot and to the back of the machine.
Hand walk the first stitch when sewing and this should keep the top and bottom thread from tangling.
When stopping to change the position of the fabric (turning a corner, sewing a curved seam for example), do so with the needle down into the fabric. This not only anchors the fabric so it does not slip, but prevents mis-stitching.
If you are doing everything according to the manual and are still having a problem, the machine may need to be professionally serviced.
Hi! Sounds like you're doing everything right to me, so let's see.
By not getting a straight stitch on the bottom, do you mean that the bobbin thread is loopy? If so, then most likely you have to reset the tension. Get a scrap of jeans material and practice on that....it would be great if you could use different color threads on top and in the bobbin, but that might not be practical if you don't have the jeans thread in different colors already.
You'll be adjusting the top tension, because even tho the top stitch looks perfect, it may not be tight enough to pull the bobbin thread up into the fabric where it belongs.
Sew a couple of inches on your scrap, then stop and check the bobbin thread. If it's loopy, you can also see the top thread on the underside. (Which is why using two colors is helpful.) With the pressure foot down, tightened the top tension just a bit. Sew a few more inches and check again. Keep on sewing, checking, and adjusting until you can't see any (or almost any) top threads on the bottom or bobbin threads on top.
Here are a couple of other ideas to check:
1. Make sure your bobbin is inserted correctly. If I happen to put one in backwards by mistake, the bobbin will make a lot of clanking noises.
2. Using your flywheel, lower the needle all the way through the stitch-making process to see if it's hitting anything along the way.
3. Oil your machine.
4. Make sure all the screws etc on your throat plate (also called needle plate) are tight. (I've had mine get loose and that will definitely throw a knock into the works!)
Check out these ideas and let me know if anything works, or if the problem is still there, ok?
Sometimes when I need to use heavy thread for top stitching to reinforce a seam that has come undone, I will use the heavy thread on the top and regular thread on the bottom. I haven't tried it the other way around for hemming but I would think it would work. I do not currently have a Bernina.