By channeling motor reducer coupling connection with ball screw reducer; detection device has a displacement sensor and bolted to the upper fine-tuning mechanism. The beneficial effects of the present invention is as follows: with improved efficiency, response speed, can achieve real-time control, reduced equipment size, save energy and reduce wear and tear, long life, high reliability, etc. mainly by precision ball screw ball screw lift Vice and high precision worm gear constitute SJ cube lifts for high-speed SJ, high-frequency and high-performance devices. Compare with the ordinary worm screw lift running speed is greatly improved SJ screw lift, can easily adjust and operation, long service life, the use of high-quality ball screw to make it work than the average life expectancy increased trapezoidal screw 3 times. SJ-precision screw lift _ Kai brand SJ screw jacks (certified) _SJ provided by Tai Machinery Co., Ltd. Dezhou. Dezhou Tai Machinery Co., Ltd. (www.qitaijixie.com) is a leader in Dezhou, reducer, gearbox, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . In Tai machinery leadership with the staff warmly welcome all inquiries negotiations to create a better future for Tai machinery.