1. Lockstitch sewing machine:
When the needle bar is at the highest point, the distance between the needle tip and the needle plate is 14 mm (the unit is the same below), or when the needle is at the lowest point, 1/2 of the needle eye is tangent to the inner circle of the rotary hook. This position can be suitable for most fabrics (the same below takes into account factors such as hooking time).
2. Overwrapping machine:
When the needle bar is at the highest point, the distance between the left needle tip and the needle plate is 10, which is more appropriate when making five-thread overburden;
When the needle bar is at the highest point, the distance between the right needle tip and the needle board is 10, and it is not easy to skip stitches when the three-thread overburden is too thick (considering the hook thread time and other factors, the same below).
3. Double needle chain type lockstitch sewing machine:
When the needle bar is at the highest point, the distance between the needle tip and the needle plate is 10, and the previously adjusted 8.5 is normally done.
4. Knotting machine:
When the needle is at the lowest point, the needle tip is tangent to the inner circle of the shuttle and does not exceed it. This position can be suitable for most fabrics: more than 1.5 is suitable for thin and soft fabrics; it cannot be hit too low on the bobbin case.
5.299 Round head buttonhole machine:
The height of the needle bar of this machine cannot be adjusted. To talk about a little trick, generally the needle bar should be lowered for repairing the machine. The machine may be easier to do. 299 The machine is worn out after more than ten years of use. The low point of the needle bar should be better for skipping stitches. Add a spacer between the pendulum needle rod (548381) and the pendulum needle guide rod (548382). The distance of the drop is the thickness of the washer. It is too low!
6. Interlock sewing machine:
When used for double stitching:
The minimum distance between the tip of the needle and the needle board is 9.3mm for 4.0mm double needles
The minimum distance between the tip of the needle and the needle board is 8.9mm when double needles are 4.8mm
The minimum distance between the tip of the needle and the needle board is 8.5mm when double needles are 5.6mm
The minimum distance between the tip of the needle and the needle board is 8.1mm when double needles are 6.4mm
When used for three-needle interlock stitching:
The minimum distance between the tip of the needle and the needle board is 8.9mm when three needles are 4.8mm
The minimum distance between the tip of the needle and the needle board is 8.5mm when the three needles are 5.6mm
The minimum distance between the tip of the needle and the needle plate is 8.1mm for 6.4mm three needles
