Sewing Machine Timing
ballroom dancers, unless both partners work together with
flawless grace, the whole dance falls apart.
Sewing Machine Timing Instructions, your sewing machine
must be properly timed. It is apt to compare the timing
to a large square dance. Many different parts all work,
move, rotate, and act simultaneously to achieve perfect
harmony. There are two principle areas in your sewing
machine where timing is most obvious.
is the timing relationship between the hook and the needle
which we call hook-needle timing.
Machine Timing Instructions explains the upward, backward,
downward, forward motion. The feed dogs which must
coordinate with the rise and fall of the needle which we call
feed dog timing.
Sewing Machine Timing Instructions, the sewing machine is
properly timed. All the parts work together in a seamless
flow of coordination. The needle moves from it highest
point down toward the needle plate. The feed dogs reach
the farthest point toward the back of the sewing machine. The
feed dogs drop under the needle plate just before the needle
point reaches the needle plate. The needle continues to
move down dragging the upper thread under the needle plate, and
proceeds toward its lowest point.
Timing Instructions, the needle begins its rise back
up. A loop of thread forms along the back of the needle.
A special cut out on the back of the needle to accommodate this
loop is called the scarf. The sewing machine hook slides
behind the needle. The point of the hook slides into the
thread loop and pulls the thread around the bobbin. The
bobbin thread and upper thread wrap together. While the needle
and hook proceed through their actions under the needle plate,
the feed dogs move under the needle plate from back to
front. The needle proceeds to rise again up out of
the bobbin area exiting the needle plate. At the same
time the feed dogs rise up out from under the needle plate and
begin move from front to back as the needle continues to
rise. The thread from the bobbin flows through a bobbin
tensioner providing resistance to the thread as it is drawn up
by the upper thread knot. The upper thread is also under
tension from the upper tension, thread guides, tension spring,
and sewing machine take up lever. The thread from top and
bobbin grow increasingly tighter until they form a locked
stitch in the middle of the fabric. This process is
repeated for every stitch.
Timing Instructions, the needle, hook, and feed dogs must
move in harmony. If they fail to do so, the machine will not
perform as expected. When the hook is just slightly out
of time with the needle, you will notice skipped stitches. This
may begin on only one side of the zig zag stitch or
intermittently. If the timing is just a bit more out of sync,
stitch formation will become impossible.
If the feed
dog timing is out of sync, the fabric will not move through the
machine as expected. Threads may bunch up or the fabric may
just not move.
As you can
see, timing is everything.
Sewing Machine Timing
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