Thread clumping

Posted by Carol on October 7, 2008, 10:19 pm

I have a Janome 300 that sews beautiful for about 20
minutes....anything longer, and the thread on the bottom "clumps"
up....is this usual? what can I be doing wrong? I know "clumping"
isn't the right word either! Any suggestions?
'Carol

Posted by BEI Design on October 7, 2008, 11:39 pm

Carol wrote:
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First, I know nothing about your machine. That said, when
thread-nests occur *under* your work it usually means there
is a problem with the TOP (needle) tension. Check your
threading path carefully, re-thread from scratch. Clean the
entire path if possible, gently "flossing" between tension
disks. Change the needle!

A more remote possibility is a problem with the bobbin
thread. Double check that the bobbin is in the correct way,
and that the bobbin thread is under/through any tension
spring.

HTH,

Beverly

Posted by Emily Bengston on October 7, 2008, 11:58 pm

On 10/7/08 9:19 PM, in article
8a6ace1c-1811-4824-a3bd-c4bea47feade@42g2000pry.googlegroups.com, "Carol"

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"Thread clumping is self-explanatory to most of us who sew. A few reasons
I can think of why it happens is: First, the needle must be the correct one
for the fabric; 2ndly, the machine must be threaded correctly; and when
threading, the presser foot should be in its most upright position. If not,
the thread will not feed correctly in the tensions. The 3rd one is the
setting of the tension in both the needle and sometimes the bobbin. There
are several helpful people on alt.sewing that are better at explaining
probably than me.
Emily

Posted by Kirsty Wursty on October 8, 2008, 12:52 pm

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I had this problem in the beginning with pre-wound bobbins. Some of them
had a little uneveness (like a burr) where the thread would get caught after
a few minutes of sewing. It was enough to cause the clumping you are
talking about. I started using a metal nail file to smooth it out and that
seemed to help. A related problem could also be burrs on the needle plate
that catch the thread underneath and make it clump.
Good luck. That problem is very annoying.

Kirsten

Posted by 1-866-608-0400 on October 24, 2008, 9:14 pm

Your thread tension is incorrect- if there is a mess on the wrong side,
the issue is almost always the tope thread tension issue- if the top is
messed up, its the bobbin thread.
In article

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