|
Control Settings
IMPORTANT:
All Coast guiding systems are designed to operate
on low pressure plant
air. Before making any adjustments, it is important
to point out that there are three (3)
interrelated control settings.
Changing one setting,
can affect the other two.
Before making any adjustments,
remove the web from the guide sensor.
Once the web has been
removed, begin the 3-step adjustment process.
There are three (3) interrelated system settings.
Changing one setting can affect the
other two.
Click to watch a video
demonstration of these control settings.
| 1. |
Operating Pressure
Adjustment: Set
the air pressure regulator
to 5 p.s.i. for minimal air usage and
economical operation.
If additional shifting
force is needed for guiding a large
Intermediate Guide or a comparatively
heavy Shifting Roll-Stand, increase the
operating pressure in 1 p.s.i.
increments up to about 10 p.s.i.
maximum, until satisfactory movement is
achieved. Changing the air pressure will
require resetting the gain
and/or bias adjustments.
|
| |
|
| 2. |
Gain Adjustment: Gain adjustment is
controlled by a needle valve
located in the Servo Controller’s base
plate under a removable black cap. This
controls the system’s frequency
response through the
amount of air going to the airflow
sensor.
Using a flathead
screwdriver, close the needle valve by
turning it clockwise until resistance is
felt. Then, open the valve by turning it
counter-clockwise, between 3-¼ to 3-¾
turns.
This is a sensitive
adjustment and, if opened a little too
far, the system will become too
responsive, causing the guide to move
quickly and erratically.
If the needle valve is
not opened far enough, the guide will
respond/move very slowly. Adjust while
inserting a paper "flag" in and out of
the sensor to simulate a web and observe
the guide movement. The objective is responsiveness
and stability.
|
| |
|
| 3. |
Bias Adjustment: The Bias
Adjustment Knob is
located on the same end of the servo
controller as the needle valve. While
moving a piece of paper in and out of the
sensor, slowly turn the bias adjustment
knob one way or the other until guide
movement is detected. Continue until guide
moves at the same speed in both
directions.
Note:
If the guide stays to one side and does
not respond to the moving piece of
paper, this usually means that either
the bias adjustment knob
or the needle valve
has been screwed in or out too far and
is out of its range of adjustment.
Slowly turn the adjustment the other
way, while using the piece of paper at
the sensor to again find the adjustment
range as described in steps 2 and 3.
|
There is an interrelationship
between the air pressure,
needle valve and bias
adjustment knob, and when
adjusting one, you may have to slightly readjust
the other. Once the system is properly set, it
will move smoothly and responsively with balanced
shifting speed. Further adjustments should not be
needed.
For additional help concerning control
setting adjustments or troubleshooting,
visit the FAQ section or
call 1-800-513-2345 and ask for a technical
service representative.
Click to save and print these
instructions in PDF format.
|
