Functions of FMS Computer Control System

Functions performed by the FMS computer control system might be grouped into the following categories:

a) Workstation Control: In a fully automated FMS, a computer control system is utilized at the individual processing or assembly stations.

b) Distribution of Control Instructions to Workstations:  DNC is utilized for this purpose. The DNC system stores the programs, permits submission of new programs & editing of existing programs as required.

c) Production Control:  The production control functions are accomplished by routing and applicable pallet to the load/ unload area and providing instructions to the operator for loading the desired work part.

d) Material Handling Control: This is accomplished by actuating switches at branches & merging points, stopping parts at machine tool transfer position, and moving pallets to load/unload stations.

e) Tool Control : This is concerned with managing mainly two aspects of the machine tool,

• Tool locations, i.e. keeping track of the machine tools at each of the work-station by receiving the information that whether tools needed to process to particular workpiece is present at the station or not.
• Tool life monitoring deals along with the idea that whether the cumulative machining time is below the mentioned tool life or not. In case machining time reaches the specified life of the tool, the operator is notified that a tool replacement is required.

f) Performance Evaluation: The computer system is programmed to assemble data on the operation & the performance of the FMS. After that this data is summarized periodically to report to the management system.