Sewing Machine Shuttle Hook Timing Problems and Solutions/Problems caused by incorrect timing

What Problems Occur Due to Incorrect Shuttle Hook Timing in a Sewing Machine If the shuttle hook timing of the sewing machine is not correct, the shuttle hook does not operate at its proper timing, due to which it is unable to form a loop by joining the needle thread and the bobbin thread. https://www.youtube.com/watch?v=K_oyuZfynYs This results in problems such as the bobbin thread not coming up, loop not forming, stitches skipping, and sewing not happening at all. References