Safety Control System For Laminating Line

Six new lockable guard switches were fitted on the machine. A safety ‘motion detection system’ was included using star wheel plates and rotation detection proximity switches fitted on two DC motor driven rollers.

The redundant safety system was designed to ensure that if one contactor failed to open and remove the mains supply, a backup contactor would ensure the supply is removed. Designing machine safety systems needs due consideration of machine operability. The use of a programmable safety PLC (Pilz) allowed the flexibility for machine operators to enter some sections of the machine, for thread up etc., without compromising the integrity of the machine safety circuit.