The feed transmission system of automated transfer machine is usually operated by servo feed system. The function of the servo feed system is to control the movement of the executive parts after amplification according to the command message from the numerical control system, not only to control the speed of the feed movement, but also to precisely control the moving position and trajectory of the tool relative to the workpiece. A typical automated transfer machine closed-loop control feed system is usually composed of position comparison, amplification components, drive units, mechanical feed transmission mechanisms and detection feedback components. Among them, the mechanical feed transmission mechanism of the automated transfer machine refers to the whole mechanical transmission chain that changes the rotation movement of the servo motor into the linear feed movement of the table or the tool rest, mainly including the deceleration device, the screw nut pair, the guide parts and their supporting parts. automated transfer machine feed mechanism is an important link in the servo system, in addition to high positioning accuracy, but also should have a good dynamic response characteristics, the system tracking command signal response should be fast, good stability.

In order to ensure the transmission accuracy, stability and dynamic response characteristics of the automated transfer machine feed system, the feed mechanism is required to have no clearance, low friction, low inertia, high stiffness, high resonance rate and appropriate damping ratio. In order to meet these requirements, the following measures are mainly adopted:

Try to use low friction transmission, such as the use of static guide, rolling guide and ball screw, etc., to reduce friction.

The best transmission ratio is used to improve the machine resolution, accelerate the table as much as possible to achieve the tracking instructions, and minimize the transmission inertia of the system converted to the drive shaft.

Shorten the transmission chain and improve the stiffness of the transmission system by pre-tightening method, such as using the motor to drive the screw directly, there should be pre-loaded rolling guide rail and rolling screw pair, screw support designed to be fixed at both ends, and can be pre-stretched structure to improve the stiffness of the transmission system.

As far as possible to eliminate the transmission gap, reduce the reverse dead zone error, such as the use of the coupling to eliminate the gap, the use of the transmission pair to eliminate the gap measures.

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