Design and Function
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3.2 Function
With web edge guiding or web center-line guiding in automatic
mode, one or two edge sensors connected to the controller detect
the current position (ACTUAL position) of the material web and
transmit the respective information to the integrated position
controller.
With line and contrast guiding, the sensor CLSPro600 detects the
current position (ACTUAL position) of a line or contrast transition
on the material web and transmits the respective information to
the position controller.
The position controller compares the ACTUAL recorded position
against the predetermined SETPOINT position. The controller will
send a relevant correction signal to the actuator if a deviation is
found to exist between the two values. The actuator will move the
guiding device (rotating frame guide or swivel roll guide) until the
material web returns to its SETPOINT position.
3.3 Guiding Modes
The controller permits the following web guiding modes:
■ Web edge guiding
(guiding to the right or the left web edge)
■ Web center-line guiding
■ Guiding on continuous or interrupted printed lines
(in conjunction with the CLSPro600 line and contrast sensor)
■ Guiding on continuous or interrupted contrast edges
(in conjunction with the CLSPro600 line and contrast sensor)
■ Watchdog
Guiding to a printed line or contrast edge with automatic
switching to web edge guiding when the printed line / contrast
edge is interrupted or lost