兿੎끳톑啣粜---欢迎您!

百叶窗图片载入中
We're right.

 

Contact person: Alan

 

Telephone: 0755-23069425

 

Website: www.eceuta.com

 

Q Q: 528646316

 

TELL:13316501082

 

 

Your location:Home>News > News
CNC engraving machine servo driver classification
Release date:2016-01-13

CNC engraving machine servo driver classification

 

1. The purpose and function points of feed drive and spindle drive

 

Feed drive is used in CNC machine tool working platform or tool post coordinate control system, cutting feed movement control of each axis machine tool, cutting process and provide the required torque. Spindle drive control of machine tool spindle rotation, for machine tool spindle drive power and the cutting force required. Generally, for the feed drive system, the main concern of its torque size and the adjusting range, adjust the size of the precision of the high and low, and the speed of dynamic response speed. For spindle drive system, the main concern if it has enough power, the width of the constant power regulation scope and speed adjusting range.

 

2. According to control principle of separate loop control and closed loop control

 

CNC engraving machine servo system according to the presence of position feedback points two basic control structure, namely the open-loop control and closed-loop control, the resulting position open-loop control system and position closed loop control system. Closed loop control system and according to the position detection device installed on the machine tool's position is different, further divided into half closed loop servo drive control system and full closed loop servo drive control system. If the position detection device installed in the machine tool worktable, composed of servo drive control system for full closed loop control system; If the position detection device is installed on the machine screw, servo drive control system is composed of a half closed loop control system. Modern CNC machine tool servo drive with closed loop control system. Open loop control system used in the transformation of economical nc or old equipment.

 

3. According to the driving action of executive element, the principle of dc servo driver and ac servo driver

 

In the 70 s and early 80 s, CNC engraving machine adopts dc servo drive. Large inertia dc servo motor has a good wide speed performance, large output torque, overload capacity is strong, and, due to the motor inertia moment of inertia of the machine tool driving part and constitute a closed loop after is easy to adjust. And medium and small inertia servo motor and the dc power transistor PWM drive, compared to the numerical control machine tool for frequent starting, braking, and to meet the requirements of rapid positioning and cutting. But one of the biggest characteristics is a brush dc motor and mechanical commutator, limiting it to large capacity, high voltage, high speed in the direction of development, make its application is restricted.

 

Into the 80 s, in the field of motor control ac motor speed control technology has made breakthrough progress, big push into ac servo drive system of electric drive speed regulation control fields. The biggest advantage is ac motor ac servo drive system easy to repair, manufacture is simple, easy to develop in the direction of large capacity, high speed, is suitable for use in a harsh environment. At the same time, thus reducing the servo drive system dimension and improve reliability point of view, the ac motor than the dc motor will be more reasonable.