BY300-600model series, the chufa shape sugar coating machine consists of the stepless rotating speed model and fixed rotating speed model(5-50r/min adjustable), this machine is widely applied to various industries such as pharmacy, chemistry, and foodstuff, which attempt to produce new products in experiment or which have small amount of production. The stepless variable speed machine is mainly used in the new techniques of the membrane coating. The membrane coating machine has got ejection gun and frequency conversion device.