Processing system and control method for handling continuous sheet of material

A high-precision web processing system comprising:

• two rollers configured to rotate at a same phase while being in contact with a web which is continuous along a movement passage;
• and
• a suppressing mechanism for suppressing a variation in a tension of the web between the two rollers, the variation in tension arising due to wind disturbances,
• wherein the suppressing mechanism includes a dancer roller configured to come into contact with the web between the two rollers, wherein the suppression mechanism applies and then maintains a reference pressure to control the position of the dancer roller, and
• wherein the reference pressure is obtained by detecting a pressure when the dancer roller is maintained at a certain position while in contact with the web while the web is being transported.

A control method of a web processing system including

• two rollers that are configured to rotate at the same phase while being in contact with a web which is continuous along a movement passage;
• and
• a dancer system that includes:
• a dancer roller disposed between the two rollers,
• an actuator with a rod,
• a tip of the rod is connected to the dancer roller,
• a position sensor that detects a position of the rod,
• a pressure sensor that detects a pressure in the actuator, and
• a control unit;
• the method comprising:
• first, controlling the rod to maintain a certain position based on a detected value from the position sensor, wherein the control unit records the pressure detected by the pressure sensor as a reference pressure;
• and
• second, the control unit controls the actuator to maintain the reference pressure, with reference to a detected value from the pressure sensor.