FCS is the short name of Fabric Circle System, meaning folding single cycle traction system.The system is composed of two parts: moving fabric supporting structure and single motor cycle structure.The shutter is driven by a tubular motor.The fabrics can expand or pack up, while the steel wire around the reelpipe pulling the drawbar.The fabric can be moving with the help of steel wire cycle structure.The motor drives reelpipe and rope winder; The steel wire drives the fabric to move through rope winder and fixed pulley. The structure runs smoothly and produces little noise.