The movement of the knife advance mechanism in the knife head of the original YJ17 cigarette making machine was not reliable due to the distortion of seal parts at high\|temperature and insufficient parts' precision.

Aiming at the problem of screen block in the feeding airlock in YJ19 cigarette maker, the airlock was improved: putting an inclined screen to replace levelled one inside the airlock and adding an internal suction pipe to automatically clean the screen with the suction air supplied by the pneumatic conveying system.

The mechanical structure of and position relationship between cut-off knife and ledger in the improved YJ19 cigarette maker were analyzed,and the makeup and realization of the electrical system were discussed.

The rod breaker in YJ19 cigarette maker had complex mechanism and long gearing chain, and its stability and reliability were not satisfactory.

The shortcomings influencing weight stability of cigarette in original weight control system in YJ19A cigarette maker were indicated: the ecreteur discs were relatively far away from the trough rails when tobacco was trimmed.

This paper introduces the application of industry control computer in cigarette machine group monitoring and management system.

The basic principle of paper supply is introduced for packaging machines It is investigated to apply inverter drive to paper supply with equal tension The cigarette paper supply with equal tension is presented The paper tension detected for the highly speed cigarette machine is described and the system diagram is give

The PID weight control system s structure of MK95 cigarette machine was introduced and the principle about the control system was analyzed, such as the check of weight symbol, PID parameter choice.