Question about Sewing Machines
I like your detailed description it really helps. A simple check of the upper tension is to install a size 80 needle and with the presser foot down pull the thread diagonally backwards and to the right. The needle should flex about an 1/8 to 1/4 inch. This will confirm your upper tension is ok. On the lower tension a resaonable starting place is done with a scale at 21 grams. In place of this use a wooden clothes pin with 3 pennies super glued to it as a weight.
It may not be a tension problem as you can see in the video clip.
Posted on Oct 13, 2013
Is the needle inserted correctly?
is the needle in backwards?
is it the right needle for the fabric being sewed?
has the top thread come off the thread take up lever?
is the bobbin turned the right way in the bobbin holder?
if none of these suggestion help, then I suggest taking the machine to a different repair person ...
Posted on Oct 13, 2013
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Posted on Jan 02, 2017
SOURCE: bobbin tension
If the looping is happening on the underside, it is your top tension that is to blame, conversely looping on top is bobbin tension.........take a look HERE for detail on cleaning lint buildup.
Top tension should be set around the middle of the range, usually 4 - 6.
I would not advise playing with bobbin tensions, however, you can take the needle plate off to clean the hook race area (where bobbin case sits) ...this is good housekeeping, my wife does this every time she replaces the bobbin....just take it out and clean the bobbin case and the fixed metal hook race with a small brush to remove lint, if there appears to be fine dirty deposits, a cloth or cotton bud (Q tip) moistened (not soaked) with methylated spirit will do the trick.
Posted on Jan 27, 2008
SOURCE: 5932 knotting every other inch
Try oiling the hook if you haven't recently.
Check you needle plate and hook for damage, they may need to be buffed or sanded smooth.
Check your upper tension discs for lint and double check your upper thread path (proper threading).
There are other things like hook timing, needle clearance or broken check spring that may be wrong but you need a technician for those things.
best of luck!
Posted on Jan 31, 2009
SOURCE: janome straight stitch loose
I don't know if this is the right answer for any of you, but thought I'd put my 2 cents worth in. Often this can be the bobbin in backwards. It needs to unwind a certain way depending on the machine. I've heard a phrase for this: Mind your p's and q's which means some wind off to the right like a q, others to the left like a p. Mine has to unwind one way then be slipped backwards into a little slot or it does that loose bottom thread looping and bunching someone here mentioned. It seems everytime I get that problem I rethread the top thread 100 times before it clicks again and I remember it could be the bobbin thread. Either your manual will tell you the correct way, or you could experiment and try one or the other. Once you figure out whether you're a p or a q, mark it on your machien somewhere to remind yourself.
Good Luck and Happy Sewing!
Posted on Apr 04, 2009
SOURCE: Stitch tension problem - bobbin
please try this simple tips:
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
5.Lint or thread in top tension=======clean between tension discs
Thank you and good luck.
Posted on Jun 17, 2011
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