Stay Machining of mechanical parts In ， The servo system of CNC machine tool refers to the automatic control system which takes the position and speed of the moving parts of the machine tool as the control quantity ， Also known as servo system 。 Stay Machining of mechanical parts Factory ， The most important component in servo system ， Encoder and grating ruler 。

　　 Machining of mechanical parts The servo mechanism of is divided into open-loop 、 Three types of semi closed loop and closed loop 。 Today, let's analyze the open-loop servo mechanism ， It is driven by stepping motor 、 Step motor composition 。 Pictured 1-3 Shown ， Each pulse signal makes the stepping motor rotate at a certain angle ， Push the table to move a certain distance through the ball screw 。

　　 Such Machining of mechanical parts The servo mechanism is simple ， Stable work ， Easy to use ， However, the stepping motor of servo drive unit has low frequency resonance and other weaknesses ， Improvement in accuracy and speed is limited 。