Electromagnetic Dancer

fine wire drawing cemanco supertek auto winder spooling takeup payoff electromagnetic dancer

Introducing the most innovative tensile force controller in winding technology: The electromagnetic dancer. Providing absolute precision in the winding of delicate materials. Using weights, springs, and pneumatic cylinders to provide tension control can cause variance in the tension the patented electromagnetic force method used in the electromagnetic dancer keeps the tension constant regardless of the dancer position.

The dancer position is only adjusted for the drive motor this design allows for more precise compensation for external disturbances without changing the tensile stress, or the winding tension. The electromagnetic dancer can keep the tensile force exactly at the specified target value even if the spool RPM changes.

The design of the electromagnetic dancer gives it the flexibility to be used in many different winding and spooling applications allowing you to handle multiple types of jobs with just one device. The EDL-60 and the EDR-10 (seen below) provide you with improved technology for an increase in the quality of your product.

Electromagnetic dancer EDL-60
The successor to the EDL-50 increases tensile force range by 20%

Optimised linear guide and extended dancer range of motion minimizes the number of return pulleys to reduce friction.

For all traction applications from 10cN to 600cN.
Dancer force bandwidth: 20cN-1200cN

Especially suitable for fine wires, optical fibers, fibers, etc.

Download PDF


Electromagnetic dancer EDR-10
For all traction application from 2mN to 1000mN.

Dancer force bandwidth: 4mN-2000mNEspecially suitable for sensitive applications, e.g.

For annealing fine wires with very high accuracy requirements or for winding very thin wires in the lower tensile range of mN.

Also suitable for spider silk!


Download PDF


How this dancer works.

The tensile force (FZ) is proportional to the dancer force (FT). The dancer force always remains constant regardless of the dancer position.

A deviation from the central position of the dancer arm thus does not lead to any change in tensile force. The deviation only readjusts the drive motor.

This technical advantage offers a simple and at the same time optimum drive control with efficient compensation of disturbances without changing the winding tension.

The unit can be controlled via an analog or BUS system.



Advantages over traditional systems:


  • Highly accurate tensile force control and measurement in one unit
  • Increased quality, gentle, stress-free processing
  • Homogeneous electromagnetic dancer force over the whole dancer stroke
  • The tensile force is not susceptible to interference in relation to the dancer movement, motor control deviation and other interference, such as a changes in line speed.
  • Mass compensation of the guide roller due to automatic calibration
  • Digitally adjustable tensile force with high tensile force range at high resolution in mN steps
  • Reproducible, digitally documentable tensile force control (track and traceability for consistent traceability of the line tensile force)
  • Fully electronic system (no pneumatics or compressed air).
  • Digital specification of the tensile force of the system that can be networked
  • Contactless recording of the dancer position
  • Constant dancer force regardless of the dancer position
  • Integrated dancer position control (PID controller)
  • Motor signal output
  • Process-dependent adaptation of the tensile force possible at any time
  • Dynamic tensile force adjustment
  • Easy to integrate into existing and new machines
  • Can be used as an unwinder, uncoiler, dispenser, reel, take-up, winder, rewinding machine and winding machine
  • Automatic calibration
  • Tensile stress measuring device replaced by the integrated electromagnetic scales (magnetic susceptibility principle)
  • Crack detection
  • Easy to install, compact unit
  • Rapid pay back period
  • Improvement in quality