Tension set, composite film will appear these problems!

Gravure machine tension control system by the pendulum roller tension test, the pendulum roller end installed tension detection potentiometer, when the tension change, tension detection potentiometer values will change, at this point tension controller will receive the deviation value, and through the PID controller to adjust the corresponding rotational speed of the motor, is expected to roll tension remained stable. 1, the process of automatic changing roll tension instability problems and solutions of automatic roll cutting process was conducted in gravure machine speed, therefore in the process of old and new material automatically pick up in the impact factor is more, the abnormal vibration, easy to cause the pendulum roller between old material and new material can't achieve the smooth transition tension. Once this kind of problem appears, you can take a long time to adjust to return to normal, resulting in double waste of material and time. Solution: to ensure accurately detecting the diameter of the new material, higher encoder for precision potentiometer can be replaced. After completing in volume, due to the material status, some changes have taken place, can bring some of its diameter detection interference, so should let material stabilized before testing. Deal with the proportion of material volume unit and integral unit is more refined, when the material roll diameter changes, tension controller adjust quantity also have corresponding change, so that the tension fluctuation is smaller. 2, the initial tension instability problems and solutions in the actual production of gravure printing substrate material of roll diameter and different will vary in length, rolling unit when installing a smaller diameter material, intaglio printing machine can set up the initial tension of the machine smoothly, but if change the diameter of raw materials, gravure press pendulum roller can appear frequent vibration, and could not stable for a long time, serious when still can make composite membrane material deformation occurs, even pulled the material. This kind of situation will not only cause waste of material, also can increase the workload of operators and bring a lot of unnecessary trouble for printing enterprises. Solution: according to the different diameter of raw materials, through to the PID controller to set the proportion of different unit and integral unit, different diameter of material in building the initial tension, its surface linear velocity. Specifically: for small diameter is expected to set the proportion of larger unit and integral unit volume, such both neither are influence to establish the initial tension when the motor speed, and can establish a smooth initial tension; For larger diameter is expected to set the proportion of smaller unit and integral unit volume, make motor run slow, thus can establish a smooth initial tension.