Seifert and Skinner & Assoc. Inc. (Salt Lake City, Utah and Brussels, Belgium) has introduced ComposicaD software, designed to generate winding patterns for filament winding machines. The program reportedly enables the part programmer to build the desired laminate table — the different layers of circumferential, helical and transition winding — for each type of part (pipes and tubes, tanks and vessels, pipe tees and elbows and spars and other geometric shapes). It then enables production of each part type in a range of sizes by varying the part length and/or diameter. The software produces symmetric laminates, produces a “time optimal trajectory,” controls the fiber speed and acceleration, automatically generates minimum length transitions and more. The software also maintains a database of commonly used fiber band setups that includes bandwidth, band thickness, band density, maximum slip potential, cost and other parameters. These parameters are used to calculate laminate weights, length of fiber consumed, and costs, as well as the winding time, not only on a total-part basis but also for the individual lamina. ComposicaD produces machine output for up to six axes of motion (spindle, carriage, cross carriage, rotating eye, yaw axis and perpendicular axis) and automatically calculates the thickness buildup and adjusts the winding contour. Winding speeds are controlled by the machine accelerations and velocities, including the fiber speed, and can be varied up to the limits, which are specific to the particular winding machine. The system produces output for all types of CNC winding machines and has the capability to control other variables associated with the winding process, such as fiber tension, resin bath temperature and mandrel pressure.