When a sewing machine produces abnormal noise during operation, it not only affects the working environment but may also indicate potential internal issues. For cases where an electric-controlled sewing machine generates excessive noise, several effective inspection and treatment steps can be taken.
First, check whether all components are securely fastened, especially the screws around the machine head, motor base, and pulley. Use an appropriate screwdriver to tighten them one by one, as loose parts are often the main source of noise.
Second, pay attention to the lubrication of rotating parts. According to the equipment maintenance manual, apply specialized sewing machine oil to designated bearings, gears, and other key moving points. Good lubrication can significantly reduce friction noise.
If the noise is accompanied by vibration, inspect whether the motor belt is too loose, severely worn, or contaminated with oil. In such cases, clean or replace it following the belt replacement procedure.
In addition, abnormal motor operation or aging internal parts may also cause unusual sounds. When this occurs, it is recommended to contact a professional technician for inspection and diagnosis.