Locking in machine stitches

[Teradee]

2 hours ago, kgg said:

Yes. Every time you change thread spools, manufacturers of thread, thread size, needle size change or even changing the color of thread from a white to black (black is stiffer) you need to recheck the bobbin tension. Cheap Chinese thread in my experience is usually of poor quality. I have even had a needle break because of poor quality thread that I using in a pinch. They ran out of thread part way through spooling the cone so they they just joined the two end by tieing a knot to finish the spool. The needle broke when the knot wouldn't go through the eye.

To much bobbin tension and you wind up not having the bobbin thread being pulled up into the leather while to little tension and the bobbin thread will be on the top side of the leather. The needle is also important factor as too small a needle for the thread size there isn't enough room for the threads, top and bobbin, to exist in the needle hole and you can get skipped stitches. While to large a needle and the stitch will be sloppy at best. Getting the top and bobbin thread tension right is like two teams having a tug of war with the needle being in the middle.

What machine are you using?

kgg

yeah - ive battled in that tug of war a lot!  .  and ive learned once the knot is tucked into both sides and the stitch looks "correct" then i stop and just start sewing.  Im currently using a brother ls2-b837