The electric translation table is mainly composed of screw (or screw), guide rail, bottom surface, table top, motor, coupling and other parts, and each part has its own different functions. Among them, the main function of the screw is to convert the rotary motion of the motor into linear motion, and the ball screw and nut form rolling friction through steel balls, which is stable in motion, high in transmission efficiency, easy to realize high-speed operation, and can effectively solve the axial gap by changing the diameter of steel balls or adopting double nuts.
The choice of the guide rail of the electric translation table is the decisive factor of the motion stability and bearing size of the electric translation table. At present, the main guide rail forms of the electric translation table in the market are as follows: dovetail guide rail, crossed roller guide rail, linear slider guide rail and linear bearing guide rail, etc. The factors we use to evaluate the mechanical performance of an electric translation table mainly include screw, guide rail, body material, processing quality and assembly technology.
The main advantages of electric translation table are:
1. The electric translation table can quantitatively convert the rotary motion of the motor into linear motion, and its energy conversion efficiency can reach up to 70% (ball screw), which directly improves the load capacity of the electric translation table.
2. When used in combination, the tools installed on it can reach any point in the three-dimensional space, and complex motion trajectories can be realized through linear interpolation control.
3. High-speed motion can be realized by changing different motion conversion forms. In many applications, it is necessary to improve the motion speed of the electric translation table. In this case, the electric translation table usually appears in this form, which is driven by a high-speed servo motor and driven by a large pitch screw or rack-and-pinion drive, toothed belt, etc., so that the motion speed is improved without sacrificing accuracy and stability.
4. The motion accuracy is high, and the positioning accuracy and repeated positioning accuracy can reach micron level.
For example：if the driving motor is a stepping motor, the pitch angle of the motor is 1.8, and the pitch of the driving screw is 4 mm, and the linear displacement reflected on the translation table is 4 mm when the motor rotates once, then the linear displacement of the electric translation table is 4/200=0.02 mm for each step of the motor. In addition, the driver of the stepping motor has the function of pulse subdivision, which can be used to。
If you want to know more about the electric translation table, you are welcome to continue to pay attention to Beijing Padiwei Instrument Co., Ltd.
