The document provides cleaning and maintenance procedures for corona treating stations. It recommends regularly inspecting and cleaning electrode assemblies, checking pivot rotation and cleaning surfaces. For electrode cleaning, it suggests checking electrodes daily, pivoting assemblies for access, inspecting for carbon tracks and cleaning exterior surfaces with abrasive cleanser. Proper cleaning of ground rolls is also important, using mild soap and sandpaper for silicone rolls or brite pads for bare aluminum rolls. Regular maintenance of power supplies and exhaust systems is also advised to ensure proper operation.

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The barrel hinged design of the electrode assembly allows for simple in-place maintenance and
cleaning. With no need to remove the electrode assembly downtime is minimized.
Regular cleaning of your corona treating stations will eliminate most problems with them. The
station cleaning process is not a difficult one and, if performed on a regular basis, will not take a
great deal of time. We suggest that at least monthly you inspect and clean the electrode
assemblies, check the assemblies pivot rotation ability, check and clean the surface of the ground
roll and the ground brush. At the same time check the electrode air gap and lubricate the bearings.
Electrode Cleaning Procedures In a perfect world you would make sure that the electrodes in your
corona treating system were quick checked daily for general cleanliness and obvious signs of
carbon tracking. This simple 1-minute procedure will identify nominal conditions that, if left
uncorrected, might grow into problems of major proportions. For your regularly scheduled periodic
cleaning program we recommend the following procedure:
1. ▪ Ensure that all system power is turned off and properly tagged.
▪Pivot the electrode assembly for proper access.
▪ Loosen the electrode assembly for proper access.
▪Inspect the electrodes, looking for carbon tracks on the mounting tabs, loose tabs,
deterioration of the high voltage wire and general cleanliness.
2. If your electrodes require replacement of the high voltage wire return them to your supplier
or CH's service department for repair. Repair of the high voltage wire is not recommended.
3. Clean the exterior of the electrodes by wiping with an abrasive cleanser and a brite pad.
Then wipe-down with isopropyl alcohol to remove any remaining residue and evaporate any
remaining moisture.
4. Remove accumulated residue from the aluminum electrodes, insulating cover and ceramic
insulations with a stiff bristled brush or a copper brush. Inspect the electrode assembly to
insure that all cooling ports are clear and that the insulating shroud is free of carbon
tracking.
5. Loosen accumulated residue from the cooling ports with a stiff bristled brush and remove
with compressed air or a vacuum. Use a water-dampened sponge to remove any remaining
residue. Finally, wipe-down with isopropyl alcohol to evaporate any remaining moisture.
6. To repair the insulating shroud, first remove the bolts that mount the shroud to the outer
aluminum housing. Next remove the electrode mounting blocks and the shrouding from the
electrode assembly. If carbon tracking is minor it can be removed with a file or a Dremel
tool.
7. After removal of the carbon tracking the area should be sprayed with non-conductive
coating. You can now reinstall the shrouding and the electrode mounting blocks. If the
carbon tracking is significant the insulating shrouding should be replaced.

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8. You are now just about finished. All that's left is to re-install the electrodes and reconnect
them at the high voltage end of the station. As a final step, be sure to tighten the electrode
assembly and pivot it back into the operating position.
Clean your ground roll
The barrel hinged design of the electrode assembly allows for simple in-place maintenance and
cleaning. With no need to remove the electrode assembly downtime is minimized.
It's easy to clean your ground roll. The ground roll is a vital component of your Corona Surface
Treating System. Defects in the surface of the roll or in the roll covering can lead to backside
treatment, pinholes and outright failure of your system. An ounce of up-front preventative
maintenance can be worth pounds of downstream cure.
Here are a few roll care tips specific to the type of roll or roll covering that you may be using.
Bare Aluminum Roll
1. For general cleaning mild soap and water works best.
2. To remove built-up oxidation, use a Brite pad or very fine emery cloth.
3. When it is difficult to remove accumulated residue or severe oxidation, please contact
your supplier or CH’s customer service department.
4. Never use any caustic cleaner.
5. Wipe-down with isopropyl alcohol to evaporate any remaining moisture.
Silicone Coated Roll
1. For general cleaning mild soap and water or alcohol (methanol or methyl alcohol) work
well.
2. To remove tougher stains scrub manually or by palm sander with No.60~100 of medium
grit sandpaper. It is forbidden to use electric grinder. Standard color of silicone coated roll
should be dull.
3. NEVER USE 1,1,1 Trichlorethane, (MEK's), Xylene or any caustic cleaner.
4. If silicone roll’s surface is damaged, it can be repaired by using specified RTV silicone to
fill. Firstly, remove breakage and burned pieces from the damaged section. Then, use
ShinEtsu RTV silicon KE-45W to fill the damaged section. After filling, it needs 24 hours
to become complete solidity.
5. For urgent using, it is allowed to use ShinEtsu RTV silicon KE-45W mixing with hardener
at ratio 100:3. After filling, it needs 6 hours to become complete solidity.

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Silicone sleeve Roll
1. For general cleaning mild soap and water or alcohol (methanol or methyl alcohol) work
well.
2. To remove tougher stains scrub manually or by palm sander with No.60~100 of medium
grit sandpaper. It is forbidden to use electric grinder. Standard color of silicone coated roll
should be dull.
3. NEVER USE 1,1,1 Trichlorethane, (MEK's), Xylene or any caustic cleaner.
4. If silicone roll’s surface is damaged, it can be repaired by using specified RTV silicone to
fill. Firstly, remove breakage and burned pieces from the damaged section. Then, use
ShinEtsu RTV silicon KE-45W to fill the damaged section. After filling, it needs 24 hours
to become complete solidity.
5. For urgent using, it is allowed to use ShinEtsu RTV silicon KE-45W mixing with hardener
at ratio 100:3. After filling, it needs 6 hours to become complete solidity.
Clean your exhaust system
Remove the cover on the exhaust side of the plenum to check for and remove any dust, dirt and
debris. Inspect the exhaust blower to confirm that it’s rotating in the proper direction. Over the
years, the electrical service may have changed, the blower was replaced or the treater itself may
have been relocated; thus the phasing of the input power may reverse the blower’s rotation. Lastly,
ductwork should be scrutinized for cracks, leaks or corrosion and thus repaired.
Clean your power supply
While probably the easiest part of the system to maintain, the two main areas of the power supply
that need attention are the tightness of the electrical connections and the cooling-fan operation.
Poorly made connections can lead to overheating and premature terminal-block failures. Check if
the fan is working well and that it and the fan filters are not clogged with dust. This task should be
done weekly.
Electrical-grounding inspections are also imperative. For the ground-roll brush, good contact must
be made with the roll. Otherwise treatment level can immediately begin to degrade as well as
cause premature ground-roll bearing failure. For the treater-station, high-voltage transformer and
power-supply, improper grounding can result in a shock hazard or equipment damage—just as
with any electrical product.
1. Ensure that all system power is turned off and properly tagged.
2. Check to ensure all the screws and connectors are tighten.
3. Remove dust from cooling fans and vents with dried compressed air.

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One more thing: The electrode alignment
Your corona-treating system is now completely clean and shining like new. But before it goes back
into production, it’s important to confirm that the electrodes are lined up properly. A misaligned
electrode assembly causes uneven treatment, provides for inadequate treatment and may even
lead to electrode failure.
What are the three characteristics of an aligned assembly?
1. The air gap between each electrode and the ground roll is equal.
2. The recommended air gap is 2mm (0.080 in.) or whatever consistent distance is needed for
the material to be treated.
3. The material is receiving equal discharge from each electrode.
Procedures:
First, with the treater’s power locked out for safety, use a non-metallic or plastic air-gap tool (2mm
thick) to check the distance between the electrodes and the ground roll. Check only one side of the
electrode assembly at a time. Second, loosen the end-plate bolt on the assembly; then turn the
air-gap adjustment bolt clockwise to increase the gap, or counter-clockwise to decrease the gap.
Third, adjust the assembly’s stop bolt to modify the tilt of the electrodes so that they match the
curvature of the ground roll. Fourth, confirm that the interlock switch is in contact with the
interlock ring when in the treat position and the interlock opens when the electrode assembly
pivots out of the treat position.
The focus of cleaning and maintenance
1. Metal electrode → Clean with copper brush.
2. Ceramic insulation → Clean with copper brush.
3. High voltage cable → Clean with soft brush or brite pad.
4. Electrode insulating cover → Clean with soft brush or brite pad.
5. Ground roll:
Silicon roll → Clean with sandpaper or palm sander.
Bare roll → Clean with brite pad.

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