Our FX350 C/Z purlin machine driven by gearboxes, consists of decoiler, feeding and levelling device, punching system, pre-shear, roll forming system, hydraulic post cutting, run out table, hydraulic station and PLC(controlling system). Its special feature: Assemble with liner guide way to make machine change web size easily and smoothly, Produce standard products with yield strength up to 550Mpa，Long production line，no open mouth on final products, C/Z interchange only with 3 steps and within 5mins;Changing size fully automatically. Time saving and labor saving, which is highly improved production efficiency and suitable for current production. This machine is easy to operate and run stable with good precision. Large range web size is 80-350mm and thickness up to 3.5mm, which used widely and would be the most popular model in the near future.