The invention belongs to the technical field of cigarette making machines, and discloses a holeless cigarette rejecting
system for a
laser puncher of a cigarette making
machine, the rejecting
system is composed of a
signal output module, a
signal processing module, a pulse
signal counting module and a rejecting control module; wherein the signal output module is composed of a Siemens ET200S type PLC (
Programmable Logic Controller) of the cigarette making
machine, and the
signal processing module is realized based on a Siemens 1500 type PLC. A Siemens 1500 type PLC (
Programmable Logic Controller) is used for controlling a
relay K1 and a
relay K2, when a cigarette making
machine is started but a
laser puncher stops working, the
relay K1 and the relay K2 are closed, a 24V power supply is conducted to an A70M accelerator switch control module, the A70M control module gives out a rejection enabling signal, and a rejection valve is controlled to reject a non-porous cigarette. The
system can drive the rejecting valve to work under the two conditions that the cigarette making machine is started but the
laser puncher stops working, unqualified cigarettes are rejected, the qualified rate of finished cigarettes is effectively increased, the situation that when the production speed of the cigarette making machine does not reach 800 cigarettes / min, unpunched cigarettes are conveyed to the next production process is avoided, and the production efficiency is improved. The overall quality of cigarettes is remarkably improved, and potential quality hazards and production consumption are reduced.