High-Speed Equipment Speed Matching

The speed adjustment of high-speed overlock machines must comprehensively consider fabric characteristics and process requirements. For standard thin fabric sewing, it is recommended to maintain a speed range of 6,000 to 7,500 revolutions per minute (RPM), which ensures uniform stitch density while preventing issues such as skipped stitches or thread breakage caused by excessive inertia. When processing thick materials, the speed should be appropriately reduced to 5,000–6,000 RPM to minimize the risk of needle overheating and sudden changes in thread tension. In actual operation, the preset programs on the machine’s control panel can be used to quickly switch between speed settings. At the same time, attention should be paid to the synchronization between the presser foot and the feed dog—when the speed exceeds 7,000 RPM, it is recommended to increase the presser foot pressure by 15%–20% to enhance fabric gripping stability. For elastic fabrics or composite materials, it is advisable to use a gradual speed testing method, starting from a baseline speed and increasing incrementally while observing and recording changes in stitch formation, until a balance between efficiency and quality is achieved. Special attention should be given to regularly checking the lubrication status of the main shaft bearings during high-speed operation to prevent mechanical wear caused by frictional heat buildup.