The effectiveness of a tenter is defined already at the infeed, as here the edges of the web must be reliably acquired by pins or nippers on the transportation chain. The infeed rails are operated either via a rack drive or a spindle drive. The rack solution covers almost all applications. The trapezoid spindle is used if self-locking is required at machine standstill because of high cross tension.
Area of use
The rail position control is used on all normal tenters, coating and leveling frames for woven and knitted fabrics, as well as for carpets.
No other system can achieve the compactness of the tenter guider. For optimal control behavior, the sensor and actuator should preferably be arranged in a vertical line one above the other.