The Safeline/OCS combination metal detector check weigher is a hybrid machine assembled by MPI Australia . It was developed for large, high-speed manufacturers who need a total quality control function with minimum floor space.
The OCS check weighers are based on an electromagnetic force compensation principle. The weight applied is compensated for by an electromagnetically produced counter force. A precision position control keeps the system stable. The weight proportional current is transmitted to an A/D converter and processed in a microprocessor. Preprocessed data can be obtained by means of a serial interface from the load cell. Software is employed to meet Regulation 36 Part five to minimise packet weight loss by tracking. The permissible actual deficiency is 5% and the permissible average deficiency is nil.
The Safeline Signature's ability to detect at high frequency and to change that frequency offers advantages in the detection of different-sized pieces of metal and particularly for stainless steel. It also allows the system to deal with a wide range of products in different pack sizes. Stainless steel is the metal most often employed in the construction of food equipment and one of the likely sources of metal contamination.