Advantages
Advantages compared to pneumatic systems are a.o.:
Adjusting element
The electromotive adjusting element consists of a robust cast casing with a slide driven by a trapezoidal spindle. The adjusting element is optionally available for use in wet end sections of stainless steel DIN 1.4460 or in dry sections consisting of a steel case equipped with a coating system. The adjusting drive consists of a three-phase cage motor with increased resistance rotor, which means that the thermal stress in switching operation is extremely low.
Product advantages
Control system
Our guide control units are as a standard equipped with Siemens S7-300. They can be connected to a process control system without problem via Profibus, Ethernet or RS232.
Centering
At being used in forming, press and dry sections the selected operating mode usually is “centering . Here the control system determines the neutral central position of the adjusting roll. An adjusting roll adjusted that way guarantees an extremely high run stability of the web.
Oscillator control system
In Foudrinier wire sections the operating mode ′oscillator control“ can be used, if a specific oscillation of the wire is required. Apart from that this operating mode is suitable for machines with coating systems for use in dry sections. In the operating mode with oscillation control the control system computes the neutral central position of the adjusting roll. Subsequently reversing of the web takes place by a very low correction stroke. By modifying the correction stroke the cycle time can be adjusted.
Web edge position detection
There are 3 variants for the detection of the web edge position
Position indicator
The travel distance of the slide is shown as an analog signal by a position indicator. The potentiometer and the corresponding microswitch for the limit-stop device are accommodated in a robust casing. At extreme applications in the wet section the electromotive adjustment drive as well as the position indicator is protected by an additional stainless steel casings. By a scavenging air connecting piece the formation of condensed water is avoided.