Hadn't thought of that one, but by 'spool' I think you are referring to
the little sewing machine spool that takes the under-thread. I was
referring to the spools on which the thread originally comes
(Gutermann, Coats, Molnlycke, DMC etc etc).
Re: the spools used for the under thread in a lock stitch sewing
machine; I have a Frister-Rosman machine and although the spool case is
fixed the spool inside does rotate (anti-clockwise) as the stitches are
made. It is the hook around the outside of the spool case which moves
backwards and forwards to catch the thread already released from the
spool for each stitch. I think most other makes of machine work in a
similar way.
One thing that I know *is* significant with sewing machines is that
they are designed for use with Z spun threads, 3Z for regular seam
stitching and 2Z for satin stitch embroidery.
Brenda
On 31 Jul 2005, at 13:20, Carolyn Hastings wrote:
Brenda --
This is probably nothing to do with the price of beans in China (that
is,
not significant) but on a lot of sewing machines (I have a Singer, a
Viking,
and a Bernina) the spool is not free to rotate; therefore the thread
revolves around the spool as it is pulled off.
Which is interesting to me -- I hadn't thought of it before -- why
doesn't
the thread get overtwisted as it seems to if I wind a bobbin in that
manner??
Oh well, the mysteries of life.
Regards,
Carolyn
There are a variety of spool shapes around and they all seem
to work on
sewing machines because the spool is free to rotate on the
spindle.
Brenda
http://paternoster.orpheusweb.co.uk
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