The electric linear stage has always been an important part to realize the automatic linear motion of the workpiece. In practical applications, it is usually used in combination with XYZ multi-axis linear stage. At this time, the motion drive of the sliding table is more complex. So how to drive the electric linear stage to do linear motion? What components are needed to match? Now PDV will explain one or two to you.
We know that the electric linear stage drives the workpiece on the slider through the rotation of the ball screw, and then we need to use the motor and driver to drive the screw to rotate. Generally, two types of motors can be selected: servo motor and stepper motor. As for how to choose these two motors, you can choose according to your own needs. The servo motor has better control accuracy and overload capacity than the stepper motor. Especially at low speed, the stepper motor is prone to low frequency oscillation linearity, while the servo motor is not. In terms of control, the control of servo motor is also more stable and reliable.
In the application of industrial automation, the electric linear stage needs not only good rigidity and repeatability, but also its durability and bearing capacity. Motion control is also an important item that cannot be ignored in the use of linear stage. Whether it is applied to machine tools, automation equipment or robots, it is necessary to solve the problem of drive control system, especially linear motion, which directly affects the positioning accuracy and speed of the linear stage.
Electric linear stage motion control part: driver, we usually choose digital stepping driver, and select appropriate power according to the size of the linear stage. The digital and analog I/O interfaces of the driver can be used in conjunction with various upper computer devices, support MODBUS communication protocol, and facilitate networking. Through the optimized PID control algorithm, the full digital control of position, speed and torque accuracy is realized; In addition, we also consider whether the drive of the linear stage supports the 2500 line incremental encoder and the motor of the 17-bit and 20-bit high-precision encoder, which can meet higher control and drive requirements.
The working principle of the electric linear stage is very simple, and it is not difficult to use. According to the instructions of the motor you purchased, you can use PLC programming control, or you can use a simple handheld control system for multi-axis motion control. I hope that the above explanation of the slide drive can help you understand more about the working mode of the electric linear stage, and can also be better applied in your own projects.
