Assembly systems are product-specific special machines with a number of interlinked process stations for handling, joining, adjusting, testing, marking and packaging. Equivalent terms are automatic assembly machines or assembly lines. Characteristic for the type of assembly systems are the respective interlinking systems. There are continuously running, intermittent assembly systems and assembly systems with free transfer of workpiece carriers. Also via the feed of punched strip via reels can be used for interlinking. The performance of the individual types of assembly systems differs mainly in cycle time and part weight.