sewing machine adjustment question

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Sometimes I get a good looking row of stitches on top but on the bottom of
the fabric is an unruly mess.  What causes this.  BTW, I have an old (1921)
Singer with a walking foot.  Fabric is vinyl.

I am trying to sew a welt into a seam.  Four layers all together.  When I do
this the above happens more often than not.  I think it is probably tension
adjustment but I don't know which way to adjust. (tighten or loosen?).  BTW
if I simply place 5-6 layers on top of each other the machine sews quite
well.

All advise appreciated.

Thanks,

Ivan Vegvary



Re: sewing machine adjustment question
Are you using a welt foot when you do this?
If not the welt may be raising the feet to high and disengaging the tension.


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Ron Anderson A1 Sewing Machine
18 Dingman Rd., Sand Lake, NY 12153
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Re: sewing machine adjustment question
Sometimes my SM does this if I've forgotten to lower the presser foot, and
that is easy to do when I am sewing  bulky things.  HTH
Barbara in SC
"Ivan Vegvary" > wrote in message .
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(1921)
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do
tension
BTW



Re: sewing machine adjustment question
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Loops on the bottom: top tension is too loose or you threaded with the
presser foot down so the tension disks didn't open to receive the thread.
Or tension has something stuck in it and needs cleaning.
OR thread is way too heavy for the size of needle you're using.

Loops on the top:
Bobbin tension too loose or bobbin tension needs cleaning

Snarls at beginning of seam: you forgot to hold the threads behind the
presser foot while starting.



Re: sewing machine adjustment question

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Thanks for all the good replies.  I will check my upper tension.  I know I
am keeping it REALLY loose because otherwise, after about 10 or so stitches,
the discs really, really binds.  I will disassemble, clean and polish those
little discs.  This machine has not been used for over a year and was kept
in a slightly damp environment.

Yes, I am using a welting foot and the presser foot is down.

Thanks, everybody!!!

BTW, not important, just curious.  If I sew by manually turning the wheel,
my little brain tells me that for every cycle of the needle, the hook down
below should go around one full time.  That being the case, why do I still
get a jumble of thread underneath my seam?  I guess it's tension, but from
where does all that thread come?  Confusing!!

Thanks,

Ivan Vegvary



Re: sewing machine adjustment question
Ivan Vegvary wrote:
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One of the characteristics of vinyl coated fabric is that the stuff
grabs and hold onto the thread, not allowing the take-up lever to take
up the  excess thread.  The can create superb snargles on the
underside...   This is especially so if you use a heavier thread and an
insufficiently large needle and/or one of the wrong type.  I find I get
better results if I use a longer stitch and a larger needle, such as a
90, 100, or even a 110, and use a leather needle rather than a universal
needle.

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Kate  XXXXXX  R.C.T.Q Madame Chef des Trolls
Lady Catherine, Wardrobe Mistress of the Chocolate Buttons
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