Dancer Arm / Tension Sensor for Wire Tensioning Systems

Product Specifications

Technical details and manufacturing context for Dancer Arm / Tension Sensor

Definition

The Dancer Arm / Tension Sensor is a critical component within a Wire Tensioning System. It consists of a pivoting arm (the dancer) that contacts the moving wire. The position or force on this arm is measured by an integrated sensor (e.g., potentiometer, load cell, or encoder). This measurement provides real-time feedback on the wire's tension, which is used by the system's controller to adjust drive motors or brakes, maintaining consistent and precise tension throughout the process. The sensor is designed for continuous processing systems where consistent wire tension is essential for product quality and process stability. It is available in configurations using aluminum alloy, stainless steel, or carbon steel, with stainless steel (grade 304 per ASTM A240) recommended for corrosive environments. Key parameters include a rated load of 50–500 N, a 4–20 mA output signal, a supply voltage of 12–36 V DC, accuracy of ±0.5% FS, repeatability of ±0.1% FS, an operating temperature range of -20 to 85 °C, and an IP65 protection class per IEC 60529. The weight ranges from 0.5 to 2.0 kg depending on load rating and mounting. These values are reference ranges; verify model-specific specifications with the legal manufacturer or supplier before procurement. The sensor's working principle involves the dancer arm being deflected by wire tension, with the deflection converted into an electrical signal proportional to tension. This signal is used for closed-loop control. For selection, consider the wire tension range, environmental conditions, and required output signal. During operation, monitor for signal drift, mechanical wear, or damage to the arm or sensor. Maintenance signals include erratic readings or failure to maintain set tension. The sensor is not designed for use beyond its rated load or temperature limits; exceeding these may cause permanent damage. Always consult the manufacturer's documentation for installation, calibration, and maintenance procedures.

Working Principle

The dancer arm is positioned to be deflected by the tension in the moving wire. This deflection changes the angle of the arm or applies a force to a pivot point. A sensor attached to the arm's pivot converts this mechanical displacement or force into an electrical signal (e.g., a changing voltage or digital pulse count). This signal is proportional to the instantaneous wire tension and is fed back to the system's control unit for closed-loop tension regulation.

Common Materials

Aluminum Alloy, Stainless Steel, Carbon Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Load	50–500 N	Select based on wire tension range
Output Signal	4–20 mA	Two-wire loop powered
Supply Voltage	12–36 V DC	Reverse polarity protected
Accuracy	±0.5 % FS	Includes nonlinearity and hysteresis
Repeatability	±0.1 % FS	Under constant conditions
Operating Temperature	-20–85 °C	Compensated range
Protection Class	IP65	Dust-tight and water-jet protectedIEC 60529
Material	304 SS	Stainless steel for corrosive environmentsASTM A240
Weight	0.5–2.0 kg	Depends on load rating and mounting

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Pivot Bearing Part
Allows low-friction rotation of the dancer arm, ensuring accurate force/position measurement.

Material: Stainless Steel
Sensor Element Part
Converts the mechanical displacement or force of the arm into an electrical signal.

Material: Varied (e.g., Potentiometer wiper, Strain Gauge)
Arm Structure Part
The rigid lever that transmits wire tension to the sensor pivot point.

Material: Aluminum Alloy or Carbon Steel
Guide Roller Part
A free-rotating roller mounted on the arm that makes contact with the wire, minimizing friction and wear.

Material: Hardened Steel or Ceramic-coated

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Wire Tensioning System

View system integration details

Manufacturers of Dancer Arm / Tension Sensor

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Frequently Asked Questions

What is the typical output signal of this sensor?

The sensor typically provides a 4–20 mA output signal, which is proportional to the measured tension. This analog signal is suitable for integration with most industrial control systems.

Can this sensor be used in corrosive environments?

Yes, a stainless steel version (grade 304 per ASTM A240) is available for corrosive environments. However, verify the specific material and compatibility with your process media with the manufacturer.

What is the operating temperature range?

The compensated operating temperature range is -20 to 85 °C. Ensure the sensor is not exposed to temperatures outside this range to avoid measurement errors or damage.

How do I select the correct rated load?

Select the rated load based on the expected wire tension range in your application. The available range is 50–500 N. Choose a sensor whose rated load covers your maximum tension with appropriate margin, and confirm with the manufacturer.

Data Basis

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pressure:	0 to 10 bar
temperature:	-20°C to 80°C
response time:	<10 ms
tension range:	0.1 to 1000 N

Dancer Arm / Tension Sensor

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards