Devices that handle media, such as printers, require careful design to prevent failures such as paper jams, wrinkling, and crooked sheets. These machines also must perform complicated tasks such as sheet registration, folding, and collation. They must perform these tasks repeatedly without failure, and with varying media properties such as sheet thickness and stiffness. To avoid costly repairs and achieve customer satisfaction, many companies perform simulation to ensure their designs are optimal. RecurDyn has special modules specifically created to simulate flexible media interacting with rollers, guides, and other components.