Nexen AS 10 912721 - Manual (Page 7)

1 FORM NO. L-20355-B-0200
INTRODUCTION
Nexen’s Web Guide Sensor System is used for web control applications. The Web Guide Sensor System consists of
two AWL280 Sensors, an AS10-D Amplifier and a GC300 Web Controller.
The AWL280 Sensors are placed at opposite edges of the web and work in tandem to track the position of the web.
The AWL280 Sensors send an infrared light from the projector housing across a gap to the detector housing. A web
passing through the gap blocks the light. The electrical output signal from the sensor to the AS10-D Amplifier will
change in response to the changes in the infrared light.
The ASD10-D Amplifier is the excitation signal for the sensors. The ASD10-D Amplifier also conditions the sensor
output for transmission to the GC300 Web Guide Controller. The sensors transmit data to the GC300 Web Guide
Controller which in turn, generates a control output signal. This control output signal moves a mechanical element
(e.g., roll stand, guide roll steering mechanism) which keeps the center of the web at the center line of the machine.
This type of closed-loop web guiding is called "Center Guiding" or "Center Position Control" (CPC).
NOTE: The AS10-D amplifier's output voltage is designed specifically to match the inputs to Nexen's GC300 Web
Guide Controller. If you use a controller other than the GC300 Web Guide Controller, please verify that your
controller matches the AS10-D Amplifier's output voltage range of 0-200mVDC.
DETECTOR DARK
LEFT RIGHT
PROJECTOR ON
POWER
ON
SETUP
SENSOR
ENTER