Question about Brother LS-1217 Mechanical Sewing Machine

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Thread is bunching up on the bobbin side

Why does the thread keep bunching up on the underside of the material? I'm pretty sure its threaded right but I dont think the tension is set right for the bobbin. How do I fix that?

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Check out this site. All the Q&A answers in simple language, as well as a GREAT cust. support staff. (its a Brother after all!)


http://welcome.solutions.brother.com/BSC/public/us/us_ot/en/model_top/HomeSewingMachine/hf_ls1217eus.html?reg=us&c=us_ot&lang=en&prod=hf_ls1217eus

I think you might be using the wrong size needle, or thread for the material you are sewing... but the site might have a few more options.
Good luck and Happy sewing!

Posted on Jan 24, 2009

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I'm having trouble properly threading my Elna 1010. Could you please help? The bobbin thread keeps bunching up and breaking


bunching of thread under the material is an indication of insufficient tension of the needle thread
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here is a free manual for the machine

http://www.singerco.com/uploads/download/445_4830_4832.pdf

try using a new needle--make sure the needle is the right one for
the fabric
make sure the top thread has not come off the thread take up lever
try using a different bobbin
make sure the bobbin is not over full
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Try these suggestions
1. Change needle
2. Rethread the machine--top --make sure to use every thread guide
3. Take the bobbin out --make sure it is inserted correctly into the bobbin
Case, & make sure the bobbin is turned the correct way
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Model 2200 EC1 SERIES The top thread Bunches and tangles on the underside of the sewn material. I have checked that the upper thread tensioner is in good order. When I observe the thread in the shuttle...


try these suggestions
1.check to see if your needle is bent-place needle on flat surface & see if it rolls good
2.if needle make poping sound when going thru fabric it is blunt
3.check to make sure the bobbin is not warped
4.make sure there no loose thread or lint in bobbin area
5.make sure there are no burrs on bobbin or bobbin case
6.check to make the thread does not come off the thread take-up lever

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When I try to use the embrodiery unit the thread bunches up on the underside of the material--it is very loose. Any ideas on what is wrong?


The tension on the bobbin (under the deck) needs to be right. When you load the bobbin, try and pull out the thread a little. It should be firm. You should have to pull a bit to get thread out. If not, the tensioner on the bobbin is set wrong or has backed off (Or you loaded the bobbin wrong) Don't use the bypass slot!
There is one screw on the side of the bobbin holder, where the thread is pulled through when you load the bobbin. This screw can be adjusted to control the tension. See pfaff page on bobbins

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My machine isn't quite picking up the bobbin thread. It brings up the loop of the bobbin thread, but I can't pull the bobbin thread through the back of the machine - it's like the top thread (I think) is...


It definitely sounds like tension adjustments,m make sure the top tension is about 4 or 5, you should only just about be able to pull the bottom thread through with some resistence, if it is too tight slacken the screw about a quarter of a turn anti clockwise and test sew and keep doing that until you get it right.

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My needle thread keeps bunching and llooping on the underside of the fabric. I have re-threaded the needle, adjusted the tension and cleaned out the bobbin case.


If you getting loops on the bottom of your material, you need to re-thread the top of your machine. I say this because it is very rare when you will have to adjust the bobbin tension. But if you must, looking straight down at the bobbin as a clock- at 6:00 is the bobbin tension adjustment- lefty lucy, righty tighty. Hope this helps.





Make sure the needle is inserted in the machine properly- a good rule of thumb is the flat side of the needle should go to the opposite side of the last thread guide. Also make sure the machine is threaded correct
There is no standard tension for any machine to be set at. They start at four when they are brand new, however, after years and years the springs become compressed. You could start at four and then play around with it from there. If you are getting loops underneath the material, you are threading the machine incorrectly.

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I discovered that when the thread is knotting up on the underside of the material that it is usually the threading on top and has nothing to do with the bobbin.

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