1. Needle plate and feed dog
The needle plate and feed dog of the medium-speed machine are in double rows, and the rear part is stressed. When the operator uses the sewing machine with the reverse feed wrench for reverse feeding operation, it is easy to inject the needle. The board will collapse, and this phenomenon is not easy to occur if a good quality needle board is used.
Inspection method: Use a rose knife to put it into the feeding socket on the needle plate, and shake it left and right, carefully observe whether it is deformed by force, such as deformation, it is inferior.
2. Presser foot
Inspection method: Use pliers to bite the presser foot to see if it can bite the mark. Harden the presser foot, the pliers can not bite the mark. (The needle plate and presser foot of the domestic standard GC6-1 high-level machine, The quality of the feeding dog is better. The two holes of the 12481 feeding dog fastening screw made in Taiwan are printed with TAIWAN and 12481 Arabic numerals. This product is durable and the feeding tooth tip is not easy to slip).
3. The needles are high-speed double-section, silver-white, and nickel-plated needles. Because most sewing products companies use high-speed machines, many sewing products are new waterproof materials and chemical synthetic fiber materials, so the machine is required The needle must be resistant to high temperatures. Generally, chrome-plated needles are not suitable. Even if it is available, the effect is not ideal. The surface is smooth and the use time is long.
