China factory Sqn30.251A2700 (23801) 12s 1.8nm CHINAMFG Low Cost Linear Servo Motor Damper Actuator Factory Price wholesaler

Product Description

SQN30.251A2700 (23801) 12s 1.8Nm CHINAMFG Low Cost Servo Motor Damper Actuator Factory Price


The function of the actuator:
– Pressure and heat resistant plastic housing design
– Screw terminals
– Maintenance-free gear mechanism with clutch – Built-in positioning markers
– Easy-to-adjust limit switches and auxiliary switches – Integrated circuit loop

Mechanical Design:

Housing – composed of pressure and heat resistant plastic housing – Inside includes: – Geared synchronous motor with geared clutch
– The camshaft of the control section- Relays, depending on the type of driver
– Switches, connected to terminals on the printed circuit board

Colour: SQN70… / SQN71…: Gearbox housing in black grey, cover in bright grey SQN74… / SQN75…: Gearbox
housing in black, cover in black
Drive Motor
– Bidirectional Rotary Synchronous Motor
– The drive shaft can be manually disengaged from the gear train and motor – Automatic engagement Switch Adjustment
– Using Adjustable Cam – The scale on the side of the cam indicates the angle of the cam switching point
– The cam runs to the end, the auxiliary switch is color-coded – Some cam switches can be finely adjusted, just use a common screwdriver
– Other cams can be adjusted manually or with a special wrench or similar Position Indication
– Built-in: Marked at the beginning of 1 end of the gear mechanism

Electrical connection
– see «Technicaldata»
Gear mechanism – maintenance free
Drive Shaft – Constructed from black wrought steel
– Fits smoothly with the front end of the transmission mechanism – Different versions to choose from
Mounting and Mounting – Front end of transmission as mounting surface – Easy and reliable installation through mounting holes

Use And Features:

The SQN7…actuator is specially designed to actuate gas fuel valves and dampers for small to medium fuel or Gas burner. So as to
achieve the best mixing ratio of fuel and combustion air. – Connection with P-PI or PID controllers, e.g. RWF40… – Direct connection of different types of combustion controllers, such as LOA.., LMO…, LMG… or LFL… – Connection with 1 or 2 wire controller or 3 position controller

All types of actuators

Impact-proof and heat-resistant plastic housings feature: – Screw terminals for the electrical connections – Maintenance-free gear train, which can be disengaged – Internal position indication – Easy-to-adjust end and auxiliary switches for adjusting the switching points – Integrated electronic circuits

Warning notes

To avoid injury to persons, damage to property or the environment, the following warning notes must be observed! Do not interfere with or modify the actuators!
1. All activities (mounting, installation and service work, etc.) must be performed by qualified staff
2. Before making any wiring changes in the connection area, completely isolate the plant from mains supply(all-polar disconnection). Ensure that the plant cannot be inadvertently switched on again and that it is indeed dead. If notobserved, there is a risk of electric shock hazard
3. Ensure protection against electric shock hazard by providing adequate protection for the connection terminals and by securing the housing cover
4.Each time work has been carried out (mounting, installation, service work, etc.), check to ensure that wiring is in an orderly state
5. Fall or shock can adversely affect the safety functions. Such actuators must not be put into operation, even if they do not exhibit any damage







1.5 years

Applicable Industries

Hotels, Garment Shops, Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Farms, Restaurant, Home Use, Retail, Food Shop, Printing Shops, Construction works , Energy & Mining, Food & Beverage Shops, Other, Advertising Company

Weight (KG)


Showroom Location


Video outgoing-inspection


Machinery Test Report




Brand Name



Gas Burner

Product name

CHINAMFG SQN30.251A2700 (23801) Servo Motor Damper Actuator 


SQN30.251A2700 (23801)



Power supply

230V 50/60Hz


Black and gray

Shipping Term


Marketing Type

New Product 2571

Delivery time

payment after about 2 days

After Warranty Service

Video Technical Support


Gas Burners Industrial Accessories

SQN30.251A2700 (23801) 12s 1.8Nm CHINAMFG Low Cost Servo Motor Damper Actuator Factory Price

Detailed Photos


nsmission as mounting surface – Easy and reliable installation through mounting holes


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Model: Sqn30.251A2700 (23801)
Name: Damper Actuators
Operating Voltage: 230V 50/60Hz 6.5va
Number of End Switches: 2
Running Time: 12s
Operating Torque: 1.8nm
US$ 365/Piece
1 Piece(Min.Order)




servo motor

How are servo motors used in CNC machines and other precision machining equipment?

Servo motors play a crucial role in CNC (Computer Numerical Control) machines and other precision machining equipment. They provide precise and dynamic control over the movement of various axes, enabling high-accuracy positioning, rapid speed changes, and smooth motion profiles. Here’s a detailed explanation of how servo motors are used in CNC machines and precision machining equipment:

1. Axis Control:

CNC machines typically have multiple axes, such as X, Y, and Z for linear movements, as well as rotary axes for rotational movements. Servo motors are employed to drive each axis, converting electrical signals from the CNC controller into mechanical motion. The position, velocity, and acceleration of the servo motors are precisely controlled to achieve accurate and repeatable positioning of the machine’s tool or workpiece.

2. Feedback and Closed-Loop Control:

Servo motors in CNC machines are equipped with feedback devices, such as encoders or resolvers, to provide real-time information about the motor’s actual position. This feedback is used in a closed-loop control system, where the CNC controller continuously compares the desired position with the actual position and adjusts the motor’s control signals accordingly. This closed-loop control ensures accurate positioning and compensates for any errors, such as mechanical backlash or load variations.

3. Rapid and Precise Speed Changes:

Servo motors offer excellent dynamic response, allowing CNC machines to achieve rapid and precise speed changes during machining operations. By adjusting the control signals to the servo motors, the CNC controller can smoothly accelerate or decelerate the machine’s axes, resulting in efficient machining processes and reduced cycle times.

4. Contouring and Path Tracing:

CNC machines often perform complex machining tasks, such as contouring or following intricate paths. Servo motors enable precise path tracing by accurately controlling the position and velocity of the machine’s tool along the programmed path. This capability is crucial for producing intricate shapes, smooth curves, and intricate details with high precision.

5. Spindle Control:

In addition to axis control, servo motors are also used to control the spindle in CNC machines. The spindle motor, typically a servo motor, rotates the cutting tool or workpiece at the desired speed. Servo control ensures precise speed and torque control, allowing for optimal cutting conditions and surface finish quality.

6. Tool Changers and Automatic Tool Compensation:

CNC machines often feature automatic tool changers to switch between different cutting tools during machining operations. Servo motors are utilized to precisely position the tool changer mechanism, enabling quick and accurate tool changes. Additionally, servo motors can be used for automatic tool compensation, adjusting the tool’s position or orientation to compensate for wear, tool length variations, or tool offsets.

7. Synchronized Motion and Multi-Axis Coordination:

Servo motors enable synchronized motion and coordination between multiple axes in CNC machines. By precisely controlling the servo motors on different axes, complex machining operations involving simultaneous movements can be achieved. This capability is vital for tasks such as 3D contouring, thread cutting, and multi-axis machining.

In summary, servo motors are integral components of CNC machines and precision machining equipment. They provide accurate and dynamic control over the machine’s axes, enabling high-precision positioning, rapid speed changes, contouring, spindle control, tool changers, and multi-axis coordination. The combination of servo motor technology and CNC control systems allows for precise, efficient, and versatile machining operations in various industries.

servo motor

What factors should be considered when selecting a servo motor for a specific application?

When selecting a servo motor for a specific application, several factors need to be considered. These factors help ensure that the chosen servo motor meets the requirements and performs optimally in the intended application. Here are some key factors to consider:

1. Torque and Power Requirements:

One of the primary considerations is the torque and power requirements of the application. The servo motor should be able to generate sufficient torque to handle the load and overcome any resistance or friction in the system. Additionally, the power rating of the motor should match the power supply available in the application. It is essential to evaluate the torque-speed characteristics of the servo motor to ensure it can deliver the required performance.

2. Speed and Acceleration:

The required speed and acceleration capabilities of the servo motor should align with the application’s needs. Different applications have varying speed and acceleration requirements, and the servo motor should be able to meet these demands. It is crucial to consider both the maximum speed that the motor can achieve and the time it takes to accelerate or decelerate to specific speeds. Evaluating the servo motor’s speed-torque characteristics and acceleration capabilities is necessary for selecting the right motor.

3. Positioning Accuracy and Repeatability:

The desired positioning accuracy and repeatability of the application play a significant role in servo motor selection. If precise positioning is crucial, a servo motor with high accuracy and low positioning errors should be chosen. The feedback mechanism, such as encoders or resolvers, should provide the required resolution to achieve the desired accuracy. Repeatability, the ability to consistently reach the same position, should also be considered, especially in applications where repetitive movements are necessary.

4. Environmental Conditions:

The environmental conditions in which the servo motor will operate should be taken into account. Factors such as temperature extremes, humidity, dust, and vibration can affect the motor’s performance and lifespan. In harsh environments, it may be necessary to choose a servo motor with appropriate protection ratings, such as IP (Ingress Protection) ratings, to ensure reliable operation and longevity.

5. Control System Compatibility:

The compatibility of the servo motor with the control system used in the application is crucial. The motor should be compatible with the control signals and communication protocols employed in the system. This includes considerations such as voltage compatibility, control signal types (analog, digital, pulse), and communication interfaces (such as Ethernet, CAN, or Modbus). Ensuring compatibility will facilitate seamless integration and efficient control of the servo motor within the application.

6. Size and Weight Constraints:

The physical size and weight limitations of the application should be considered when selecting a servo motor. The motor’s dimensions should fit within the available space, and its weight should not exceed the application’s weight capacity. Compact and lightweight servo motors may be preferred in applications where space is limited or weight is a critical factor.

7. Cost Considerations:

The cost of the servo motor and its overall value for the application should be evaluated. It is essential to consider the initial purchase cost as well as the long-term maintenance and operational costs. While cost is a factor, it should not be the sole determining factor, as compromising on quality or performance may lead to suboptimal results.

By considering these factors, one can make an informed decision when selecting a servo motor for a specific application. It is recommended to consult with manufacturers or experts in the field to ensure the chosen servo motor meets the application’s requirements and provides reliable and efficient performance.

servo motor

How does feedback control work in a servo motor system?

In a servo motor system, feedback control plays a crucial role in achieving precise control over the motor’s position, speed, and acceleration. The feedback control loop consists of several components that work together to continuously monitor and adjust the motor’s behavior based on the desired and actual position information. Here’s an overview of how feedback control works in a servo motor system:

1. Position Reference:

The servo motor system starts with a position reference or a desired position. This can be specified by a user or a control system, depending on the application requirements. The position reference represents the target position that the servo motor needs to reach and maintain.

2. Feedback Sensor:

A feedback sensor, such as an encoder or resolver, is attached to the servo motor’s shaft. The purpose of the feedback sensor is to continuously measure the motor’s actual position and provide feedback to the control system. The sensor generates signals that indicate the motor’s current position, allowing the control system to compare it with the desired position.

3. Control System:

The control system receives the position reference and the feedback signals from the sensor. It processes this information to determine the motor’s current position error, which is the difference between the desired position and the actual position. The control system calculates the required adjustments to minimize this position error and bring the motor closer to the desired position.

4. Controller:

The controller is a key component of the feedback control loop. It receives the position error from the control system and generates control signals that govern the motor’s behavior. The controller adjusts the motor’s inputs, such as voltage or current, based on the position error and control algorithm. The control algorithm can be implemented using various techniques, such as proportional-integral-derivative (PID) control, which adjusts the motor’s inputs based on the current error, the integral of past errors, and the rate of change of errors.

5. Motor Drive:

The control signals generated by the controller are sent to the motor drive unit, which amplifies and converts these signals into appropriate voltage or current levels. The motor drive unit provides the necessary power and control signals to the servo motor to initiate the desired motion. The drive unit adjusts the motor’s inputs based on the control signals to achieve the desired position, speed, and acceleration specified by the control system.

6. Motor Response:

As the motor receives the adjusted inputs from the motor drive, it starts to rotate and move towards the desired position. The motor’s response is continually monitored by the feedback sensor, which measures the actual position in real-time.

7. Feedback Comparison:

The feedback sensor compares the actual position with the desired position. If there is any deviation, the sensor generates feedback signals reflecting the discrepancy between the desired and actual positions. These signals are fed back to the control system, allowing it to recalculate the position error and generate updated control signals to further adjust the motor’s behavior.

This feedback loop continues to operate in a continuous cycle, with the control system adjusting the motor’s inputs based on the feedback information. As a result, the servo motor can accurately track and maintain the desired position, compensating for any disturbances or variations that may occur during operation.

In summary, feedback control in a servo motor system involves continuously comparing the desired position with the actual position using a feedback sensor. The control system processes this position error and generates control signals, which are converted and amplified by the motor drive unit to drive the motor. The motor’s response is monitored by the feedback sensor, and any discrepancies are fed back to the control system, enabling it to make further adjustments. This closed-loop control mechanism ensures precise positioning and accurate control of the servo motor.

China factory Sqn30.251A2700 (23801) 12s 1.8nm CHINAMFG Low Cost Linear Servo Motor Damper Actuator Factory Price   wholesaler China factory Sqn30.251A2700 (23801) 12s 1.8nm CHINAMFG Low Cost Linear Servo Motor Damper Actuator Factory Price   wholesaler
editor by CX 2024-02-21