The Atc wood CNC router machine is widely used in the production of furniture and cabinets in modern industry, and the servo and stepper drives used in the Atc wood CNC router machine equipment are also of concern to users. Next, let's learn about the differences and applicable scenarios between servo motors and stepper motors together with JINAN M-SHINE.

Below, JINAN M-SHINE will thoroughly analyze the differences between Atc wood CNC router machines through a detailed comparison table and simple explanations

List of core differences between servo drive and stepper drive

In depth analysis of servo and stepper drivers in Atc wood CNC router machine

1. Control principle: servo drive and stepper drive

This is the fundamental difference between the two.

·Stepper drive (open-loop control):

·Working mode: When the driver receives a "pulse" signal, it commands the motor to rotate a fixed angle (i.e. a "step").

·Core issue: The system assumes that the motor has strictly followed the instructions to rotate. But if the motor does not actually turn to position (i.e. "step loss") due to excessive load, high speed, or other reasons, the system is unaware and cannot correct it. Errors will accumulate over time.

·Working mode: The driver not only receives movement instructions, but also monitors the actual position and speed of the motor in real time through the encoder at the end of the motor.

·Core advantage: The driver compares the "commanded position" with the "actual position". If there is an error (such as external force obstructing motor rotation), it will immediately increase the current output, forcing the motor to return to the correct position. This process is completed instantly.

2. Performance comparison between servo drive and stepper drive

·Torque speed curve:

·Stepper motor: capable of maintaining rated torque at low speeds. But as the speed increases, its output torque will sharply decrease. This is because the inductance effect of the motor winding limits the rapid change of current.

·Servo motor: It can provide a continuous and flat rated torque within the rated speed range. And it has strong overload capacity, which can provide 2-3 times the rated torque in a short period of time (such as a few hundred milliseconds) to overcome instantaneous huge resistance.

·Vibration and noise:

·Stepper motor: Even when stationary, there is still slight vibration. When operating in a certain medium speed range (resonance zone), vibration and noise will be very noticeable.

·Servo motor: runs very smoothly and quietly. The servo system will actively suppress vibration.

Select stepper driver:

·Cost is the primary consideration factor.

·Applied in low-speed, load stable, and known situations.

·The precision requirements are not extremely strict, allowing for a small amount of error.

·The torque requirement is not high and does not require high-speed operation.

·The system architecture requires simplicity and does not require complex debugging.

·Examples: 3D printers, desktop CNC engraving machines, low-speed conveyors, glue dispensers, telescopes, etc.

Select servo drive:

·The requirements for accuracy and reliability are extremely high, and step loss is not allowed.

·High speed operation is required.

·The load is variable and dynamic (for example, in a robot arm, the load torque is constantly changing).

·A huge instantaneous torque is required to start or stop (such as changing machine tool spindles).

·The application scenarios are complex and require adaptation to multiple working conditions.

·Examples: CNC machine tools (cutting machines, machining centers), industrial robots, semiconductor equipment, precision packaging machinery, aerospace equipment.

Returning to the scene of 'Atc wood CNC router machine'

On the Atc wood CNC router machine, servo drive is absolutely mainstream and preferred for the following reasons:

1. Prevent step loss: The load of the cutting machine may change when cutting the board (such as encountering wood nodules), and the servo system can ensure absolute accuracy of the tool path, avoiding the entire board from being scrapped due to step loss.

2. High speed and high efficiency: The servo motor allows the machine to operate stably at high speeds, reducing processing time.

3. High dynamic response: The machine requires frequent start stop and speed change, and the fast response ability of the servo system is crucial.

4. High overload capacity: At the moment of cutting, a larger torque may be required, and the servo's overload capacity can easily handle it.

Although stepper motors have lower costs, for production equipment such as Atc wood CNC router machines that pursue precision, efficiency, and reliability, the performance improvement and risk reduction brought by servo drives far exceed their additional costs. This is also why servo drives are gradually replacing stepper drives as the standard configuration for mid to high end applications in modern industry.

More Knowledge Contact Us:

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