Treadmills, additional specific safety requirements and test methods"as well as ASTM F2106"Standard test methods for evaluating design and performance characteristics of motorized treadmills"and introduced systematically in this article on its background, working principle,parameters,construction,characteristic,application and prospect.

To increase the effective width range of SP rolling mill's dies, a crank block was added to the synchronization mechanism and the aggregate kinematics model was built with vector theory, and the model was analyzed with complex method to optimize the length of uniform motion section and length of maximum side pressure of the die.

A synchronization mechanism was designed to satisfy ejection requirements of vertical ejection equipment.

Application and debug method of synchronous motor microcomputer-based exciting device in the ore-dressing plant;

This paper presents a interacive selection and control to two synchronous motors and two exciters with the PLC.

According to movement analysis of synchronous mechanism,we have derived a method deferimining two important parameters of synchronous mechanism:relation in proportion between length of the and gear ratio of tachometer roller to drive motor;formula of swinging arm R to guarantee synchronism.