SFQ800 Servo Tensioner with Multi-Stage Tension Control 7-800gf Range and RS485 Communication for Coil Winding

 Multi-Stage Intelligent Control Servo Tensioner

Tensioner is a necessary factor for keeping consistent winding accuracy.
Selecting better tensioner provides a sophisticated winding machine with best performance.
Stabilized tensioner improves winding problems and enhances productivity. For example,

stabilized tensioner causes no breaking of wire, raises operation rate, secures the value of

resistance, and increases credibility of the product.
Perfect layer winding leads to material cost cutting and easy adjustment. Therefore, time and cost

for machine maintenance can be decreased.
NHE Company has a wide range of tensioner types, from basic Magnetic type tensioners to

servo motor tensioners.

Applications:

Water Valve Coils & Solenoid Valves: Where high-speed winding (up to 20,000 RPM) is needed for massive output.

General Power Relays: For standard telecommunication or appliance relays.

Inductors & Transformers: Simple Bobbin winding.

Key Advantage: Replaces traditional mechanical felt tensioners to eliminate wire scratching and breakage,

improving yield by over 95%.Recommended Models: SFQ800,SFQ2000,SFQ300

SFQ800 Servo Tensioner - Product Features

1. Tension Range: Tension range of 7‑800gf and wire diameter of 0.05‑0.4mm are achievable by replacing different tension rods and tension springs.
2. Principle & Structure: Adopts a wire feeding mode with closed-loop control by angle sensor and DC servo motor. Upper computer devices such as industrial control screen and PLC control the stretching length of both ends of the tension spring to realize multi-stage tension program switching. (Stretching of the upper end of the tension spring is achieved by inflating/deflating the tensioner cylinder; stretching control of the lower end of the tension spring is achieved by changing the wire feeding angle of the angle sensor.)
3. Multi-stage Tension Switching
   A. Pre-set 8 tension stages directly on the tensioner display (corresponding to different working angles of the tension rod), or complete the configuration of 8-stage tension parameters via RS485 communication. Three-wire IO signal from the controller or PLC upper computer device enables program-controlled tension switching.Control the solenoid valve to inflate/deflate the internal cylinder of the tensioner for switching between two stage tension set by the knob.
4. Intelligent Network Management: RS485 network communication enables equipment data collection, online program upgrade and remote parameter adjustment, facilitating integrated management and control of production line equipment.
5. Alarm & Protection: Equipped with multiple warning functions including wire break alarm, tension upper/lower limit alarm and equipment fault alarm, effectively avoiding production abnormality risks.

Select the right model based on your Wire Diameter and Required Tension Range.

Appearance Structure and Wire - Hanging Schematic Diagram

Installation Instructions

Picture Display:

                                                                          SFQ800

                                                               SFQ3000

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. NHE 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 NHE, or contact our support team for a quick resolution.