We are professional manufacturer for coil winding tensioner,We offer Mechanical tensioner, Magnetic tensioner,electronic tensioner and servo tensioner for coil winding machine at competitive price.There is description about Servo tensioner as following: SET Servo Tension Controller (Servo Tensioner) Series Servo-type tension device (Servo tensioner) is sent from the traditional passive-line change to take the initiative to send lines from the motor, by replacing the spring tension to change its value, this product comes with tension feedback stabilization system that can automatically tension stable equilibrium. Tension is not speed, wire cover, pulleys, and felt the impact of tension in particular stable and easy to adjust