The thick material sewing machine is a machine specially designed for sewing thick materials. There is a difference between the thick material sewing machine and the machine for thin and medium thick materials. Thick-material sewing machine is different from thin-material sewing machine and medium-heavy material sewing machine in thread take-up amount. Generally, thick-material sewing machine uses DP needles. Thin material and medium-heavy material sewing machines generally use DB needles. Heavy-weight material sewing machines generally use slower speed. For thin material and medium-heavy material sewing machine. The pagoda spring of the thread clamp of the heavy material sewing machine is stronger than that of the medium-heavy material and thin material sewing machine. The force of the thread take-up spring is also stronger. The hook is also different. It is earlier than thin material and medium and heavy material sewing machines. Because its moon circle has no tail. Some moon tails have hooks and some are flat. The thin material machine is equipped with a hook, because the thin material is thin thread, even if it is a little later, it can have a good stitch.
The rotary hook of the thick material machine has no tail, that is, it is flat, because the thread used is thick, such as silk thread, and the stitches can be adjusted well as early as the thread is off. If the bottom thread always floats when making a thick thread, first adjust the synchronization and the thread take-up lever. If the thread still floats, check whether the thread shuttle has a tail. If so, replace it with a thread shuttle without a tail.