Well if you put the thread in the right tensions that the pattern calls for, then your sewing machine will decide. Oh wait I see what you mean, there isn't really a machine to do that but what you could do is this, you could cut a certain amount of thread, measure it, and see how far it goes until it runs out. Then you measure how long the line you made and POW! you have a ratio. Then you would cross multiply with the line you want to make. Remember though, you have to do a different test for a different stitch, some stitches take more thread like the zigzag. I would make chart for all the different lengths you need for each stitch. Also remember, the thickness of the thread is also a variable.
NEEDLE
holds the needle
holds the needle
The motion of the needle in a sewing machine is vertically, rapidly up and down.
Needle and thread. Sewing machine.
a needle or a sewing machine and thread.
motion of the needle of a sewing machine is what is the motino is this?
Yes.
with a needle by hand
well it depends on what sort of sewing machine it is it should say on the packaging of the sewing machine.
part that holds needle
It may be that you have a ball point needle in your machine rather than a sharp. Also, your machine needle may be too small for such heavy sewing. Try a size 16 sharp.