How to adjust the position of the rotary hook and needle on a computerized quilting machine

Computerized quilting machines can store patterns on their hard drives for extended periods, and users can add patterns as needed. Operation is simple, convenient, and quick. During actual operation, sewing different fabrics and shapes may require adjustments to the machine's hook and needle. Making adjustments without understanding the machine's structure can cause unnecessary damage. Therefore, before adjusting the hook and needle positions, pay attention to the following details:

With the needle correctly installed, the needle moves from top to bottom while the hook rotates. When the needle is at its lowest position, the hook tip should be within the range of 14°–18°, 10–12 mm from the needle center. That is, when the needle bar is at its lowest position, the hook tip should be 3.5–4 mm from the needle; when the needle bar rises 2.2 mm, the hook tip should be 1.2–1.5 mm from the needle eye.

The height adjustment of the needle and rotary hook is determined by the actual stitching needs of the sewing machine, based on the needle bar position. Due to different stitch combinations, the needle bar height adjustment is sometimes based on the needle eye and sometimes on the needle tip. When the machine needs to sew thinner fabrics, the center distance between the rotary hook tip and the needle should be adjusted to 8-12 mm. This can be achieved by loosening the three fastening screws on the rotary hook and turning it clockwise; the positioning distance will increase, and vice versa.