Method and device for diagnosing machines

Method for diagnosing machines including cigarette-packaging machines for manufacturing products including cigarettes and cigarette packets, comprising the following steps:

• providing subassemblies, the subassemblies having tools;
• examining the products for a faulty product;
• generating a fault-indicating signal indicating a faulty product;
• evaluating the fault-indicating signal for a fault-indicating signal periodicity;
• determining the fault-indicating signal periodicity;
• assigning a characteristic periodicity to each subassembly, wherein one of the subassemblies is assigned the fault-indicating signal periodicity;
• plotting a fault curve for each tool and/or subassembly;
• and
• generating a machine stop signal when a maximum permissible fault frequency (L1) or estimated fault probability within a subassembly is not greater than a current mean fault frequency ({overscore (P)}) or fault probability of the tools of the subassembly.

Method for diagnosing machines including cigarette-packaging machines for manufacturing products including cigarettes and cigarette packets, comprising the following steps:

• providing subassemblies, the subassemblies having tools;
• examining the products for a faulty product;
• generating a fault-indicating signal indicating a faulty product;
• evaluating the fault-indicating signal for a fault-indicating signal periodicity;
• determining the fault-indicating signal periodicity;
• and
• assigning a characteristic periodicity to each subassembly, wherein one of the subassemblies is assigned the fault-indicating signal periodicity;
• wherein the number of tools of one of the subassemblies is an integral multiple of the number of tools of another of the subassemblies.

Device for diagnosing machines for manufacturing products such as cigarettes and/or cigarette packets, in particular cigarette-packaging machines, comprising:

• subassemblies, each subassembly having tools;
• fault detection means for investigating whether a product is faulty, and for generating a fault-indicating signal indicating a faulty product;
• a control unit to determine and specify a fault-indicating signal periodicity;
• assigning means to assign a characteristic periodicity to each subassembly, wherein one of the subassemblies is assigned the fault-indicating signal periodicity;
• determining means to determine a fault frequency for each tool and/or subassembly;
• and
• generating means to generate a machine stop signal when a maximum permissible fault frequency (L1) or estimated fault probability within a subassembly is not greater than a current mean fault frequency ({overscore (P)}) or fault probability of the tools of the subassembly.

Device for diagnosing machines including cigarette-packaging machines for manufacturing products including cigarettes and cigarette packets, comprising:

• subassemblies, each subassembly having tools;
• fault detection means for investigating whether a product is faulty, and for generating a fault-indicating signal indicating a faulty product;
• a control unit to determine and specify a fault-indicating signal periodicity;
• assigning means to assign a characteristic periodicity to each subassembly, wherein one of the subassemblies is assigned the fault-indicating signal periodicity;
• plotting means to plot a fault curve for each tool and/or subassembly;
• and
• generating means to generate a machine stop signal when a maximum permissible fault frequency (L1) or estimated fault probability within a subassembly is not greater than a current mean fault frequency ({overscore (P)}) or fault probability of the tools of the subassembly.

Device for diagnosing machines including cigarette-packaging machines for manufacturing products including cigarettes and cigarette packets, comprising:

• subassemblies, each subassembly having tools;
• fault detection means for investigating whether a product is faulty, and for generating a fault-indicating signal indicating a faulty product;
• a control unit to determine and specify a fault-indicating signal periodicity;
• and
• assigning means to assign a characteristic periodicity to each subassembly, wherein one of the subassemblies is assigned the fault-indicating signal periodicity;
• wherein the number of tools of one of the subassemblies is an integral multiple of the number of tools of another of the subassemblies.