Monitoring method for monitoring an unwinding process, unwinding device and unwinding system

An unwinding device for performing an unwinding process of a web material from a reel, comprising:

• a reel holder on which the reel can be stored during the unwinding process,
• a driving device, by which a propulsion of the web material can be generated, and
• a detection unit, by which at least one irregularity of at least the web material or the unwinding process can be detected,
• wherein the detection unit is in a communication connection with a computing unit, wherein a correlation of the irregularity to at least one running parameter of the reel can be determined by the computing unit,
• wherein for determination of the running parameter by the computing unit, the computing unit is in a communication connection with a measuring unit for detecting an advance parameter of the web material at the driving device, and
• wherein the measuring unit is additionally configured to measure a number of rotations of the reel.

An unwinding system for performing an unwinding process of a web material from a reel, comprising:

• an unwinding device, with a reel holder on which the reel can be stored during the unwinding process,
• a driving device, by which a propulsion of the web material can be generated, and
• a detection unit, by which at least one irregularity of at least the web material or the unwinding process can be detected,
• wherein the detection unit is in a communication connection with a computing unit, wherein a correlation of the irregularity to at least one running parameter of the reel can be determined by the computing unit,
• wherein for determination of the running parameter by the computing unit, the computing unit is in a communication connection with a measuring unit for detecting an advance parameter of the web material at the driving device, and
• wherein the measuring unit is additionally configured to measure a number of rotations of the reel.

A monitoring method for monitoring an unwinding process of an unwinding device in form of a form, fill and seal (FFS) machine which is configured to produce sacks made of a web material comprising a plastic film, the method comprising the following steps:

• at least partially unwinding the web material from a reel by a driving device,
• detecting at least one irregularity of the web material and/or the unwinding process by a detection unit, and
• determining a correlation of the irregularity to at least one running parameter of the reel by a computing unit,
• wherein the running parameter is determined by the computing unit by detecting an advance parameter of the web material at the driving device by a measuring unit, and
• wherein the irregularity comprises at least one of the following features:
• unsuccessful opening of a tube of the web material on the unwinding device,
• breaking up of a product produced from the web material on the unwinding device,
• tearing of the web material on the unwinding device,
• absence of at least one part of a printed image on the web material on the unwinding device,
• increased slip on a driving means during unwinding of the web material on the unwinding device, and
• at least altered torques or forces during processing of the web material on the unwinding device.