Operation
7
19
ekr 500 web guiding controller
EDV No.: MD.299.01.06
Chapter: 7
with removable control panel
Date:
29.07.08
Page:
60/86
7.2 Material
Setup
7.2.1 General
Danger of cuts!
Never touch the edges of moving webs of material!
You are only allowed to carry out the material setup
when the production machine is stopped.
During material setup an automatic adjustment of the controller to
match the characteristics of the material to be scanned is carried out.
A material setup should be carried out when any of the following
work is undertaken in order to realise optimum guiding results:
•
During initial commissioning of the web guiding system
•
With
infrared
sensors
(IR 2001, IR 2002, IR 2005):
After changing over to a material with other contrast
characteristics (e.g. film with a different material transparency)
•
With ultrasonic sensors
(US 2003, US 2007, US 2008, US 2009):
After changing over to a material with different sound
absorption properties
•
After cleaning a dirty sensor
Material setup can be carried out either
automatically
or
manually
.
•
Automatic material setup
describes the standard
procedure for storing the bright/dark values of the sensors.
•
Manual material setup
should always be used if the
contrast that has to be scanned is critical.
Procedure for generating the bright/dark values
Bright value
•
Remove material from the sensor scanning area
(no material in the sensor scanning area).
Dark value
•
Completely cover the sensor scanning area with the material to
be scanned.
If using highly transparent material you must
ensure when you cover the scanning window
that there are no folds in the material in the
sensor scanning area (the material must be
tensioned).
!