Question about Janome Sewing Machines
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Posted on Jan 02, 2017
SOURCE: sudden knotting under fabric
I have an Elna 2005 machine and had a similar but opposite problem whereby the tension up top was too tight - thread wouldn't pull smoothly. I found adjusting the feed dog lever slightly helped the stitches a lot, even though the needle tension up top is no better. Hope that helps! :-s
Posted on Oct 29, 2007
the top seam is actually the bobbin thread. dots on the underside means that the top tension is too tight. you may have a piece of thread or something gummy caught between the upper tension disks.
Posted on Jun 11, 2009
Possibly its the check spring that takes up the slack in the thread as the needle pierces the fabric. slowly lower the needle through the fabric and watch if there is slack in the thread just above the fabric. If there is then this check spring needs to be adjusted. I hate to say this and its not just because I am a Bernina tech but its time for it to be serviced. many things might be the culprit. The distance between the hook and needle could be off for one more reason. Or something dirty or fluff under the spring the thread goes under on the bobbincase. Either a servicing or use the same color bobbin thread beneith is in order. Wish I could help more but you have tried a lot so I ruled those out such as tighter bobbin tension or looser upper tension or the combination of both.
Posted on Oct 09, 2009
Testimonial: "Thanks, Rick. I will try your suggestion to watch for slack in the thread. Thanks for not suggesting I do all the things I have already tried!"
The bottom tension is too loose. If your bobbin is in a case there is a little screw on the side that will tighten the plates and increase the tension. Test your thread coming out of the case as you slowly make adjustments to the screw. A slight bit of resistance is what you want. If your sewing still puckers you may have to loosen the tension on the top. Sew on a scrap and go toward the smaller numbers to loosen the top tension until the stitches meet between the two layers of fabric.
Posted on Dec 21, 2009
If the machine is now threaded, lift the presser foot.
Now, pull about 10" of thread through the needle.
The next time you thread the machine, lift the presser foot first.
When the presser foot is up, the tension control opens and allows the thread to "seat" into the control, then when the foot is down the control closes to the indicated setting.
When threading the machine with the foot is down, thread does not enter the tension control and when you start to sew, there is no tension on the thread.
No tension = loosey, goosey, loopy stitches underneath.
Because the lack of tension on the top thread, the bobbin thread cannot lock a proper stitch.
Posted on Mar 10, 2010
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