This situation generally occurs mainly after the equipment has been used for a period of time. When the film frame is moving up or down, jitter may be observed, which is mainly caused by three possible reasons: 1. Uneven chain tension. This includes: 1) One of the two chains is loose while the other is tight; 2) Both chains are excessively tight. 2. Lack of chain lubrication. Insufficient lubrication of the chains will lead to excessive friction when the film frame moves up or down, resulting in unstable operation and jitter. 3. Damaged sliders. The sliders are used for the film frame to slide on the guide rails during its up-and-down movement. If the sliders are damaged or there is foreign matter inside, they will also cause the film frame of the winding machine to jitter during operation. Under normal circumstances, the jitter of the winding machine's film frame is basically due to the above reasons, and users can troubleshoot accordingly. If you have other unsolvable problems with the winding machine, please call the Marketing Center of Qingdao Aixun. We will provide you with a satisfactory response.