Active wire feeding and closed-loop control Servo Tensioner

NHE provides the tensioners with best quality.

Our Servo Tensioner Series (SF/STD/SFQ) features active wire feeding and closed-loop control to eliminate wire breakage.

Compatible with 0.02mm-1.5mm wires, suitable for high-speed automated winding.

Product Overview: The Heart of Precision Winding

Why NHE Recommends Servo Tensioners?

As a manufacturer of winding machines spare parts, we know that tension stability is the key to quality.

Traditional mechanical or magnetic tensioners rely on passive friction, which often causes wire breakage

or deformation, especially with fine wires.

The NHE Servo Tensioner Series uses an Active Wire Feeding System.

Built-in DC Servo Motor: Automatically feeds the wire based on winding speed.

Closed-Loop Feedback: Real-time monitoring ensures the tension remains constant,

whether the machine is accelerating, decelerating, or running at constant speed.

Result: Zero wire breakage, precise coil dimensions, and higher efficiency.

• Permanent magnet synchronous servo motor
• High - precision encoder
• Constant - tension active wire feeding and automatic following
• Single - stage tension adjustment
• Wire break alarm and fault alarm
• Strong, efficient, and energy - saving

SF600 Series Servo Tensioner Functional Parameters (Table 1)

Tension Arm and Tension Spring Selection Parameter Table (Table 2)

• The standard configuration is one tension rod and a corresponding tension - range spring.
• Select a suitable tension rod and its corresponding spring according to the tension range.

Picture Display:

Frequently Asked Questions (FAQ)

Q1: What is the main advantage of Servo Tensioners over Magnetic Tensioners?

A: Magnetic tensioners rely on passive friction (braking), which causes tension fluctuation when winding speed changes.NHE Servo Tensioners use an active wire feeding system with a built-in motor. It automatically adjusts the wire feed speed to match the winding machine, ensuring constant tension even during rapid acceleration or deceleration. This is critical for preventing breakage in fine wires (<0.1mm).

Q2: How do I choose between the SF (Single) and STD (Dual) series?

A: Choose SF Series: For standard coil winding, where tension remains constant.

Choose STD (Dual-Stage) Series: If your process requires wrapping the wire around the terminal pin at high speed. You can set a higher tension for the pin wrapping (to ensure a tight connection) and a lower tension for the main coil body (to prevent breakage), switching automatically via the machine's I/O signal.

Q3: Is it difficult to install these tensioners on my existing winding machine?

A: Not at all. The installation is straightforward. You only need to provide a DC 24V/48V power supply and connect two signal wires (Ready/Alarm). We provide a detailed Wiring Diagram and English Manual with every unit to guide your engineers.

Q4: Do I need to calibrate the tensioner?

A: Yes, for the highest precision, we recommend performing a "Zero Calibration" (Zeroing) when installing a new tension arm or spring.

The SF/SFQ series features a simple menu knob or button to perform auto-zeroing in seconds.

Q5: What happens if the wire breaks during winding?

A: The tensioner has a built-in Wire Breakage Alarm. If the tension arm drops below the limit angle (indicating a break or empty spool),

the tensioner will immediately send a stop signal to your winding machine to prevent producing defective parts.

Q6: How often should I replace the Tension Arm and Spring?

A: This depends on your usage intensity.

Tension Spring: We recommend checking its elasticity every 6 months.

Wool Felts & Ceramic Eyelets: These are wear parts. Check them monthly and replace them if they show signs of grooves or wear to protect the wire insulation. QIANHE stocks all these spare parts for fast delivery.

Q7: Can I use one tensioner for different wire sizes?

A: Yes, but within a range. For example, the SF800 covers 10g-800g. If you switch from 0.05mm wire (low tension) to 0.25mm wire (high tension), you may need to change the Tension Spring to a stiffer one to maintain stability. We offer a full spring kit (T1-T19) for this purpose.

Q8: Why does the tensioner display an error code?

A: The LED display on SFQ/SFW models provides real-time diagnostics. Common codes indicate "Over-current," "Over-speed," or "Limit Position Error." Please refer to the User Manual provided by QIANHE, or contact our support team for a quick resolution.