Technical Specifications

ROTO GRAVURE

• Proper Mounting and Usage of Mona + plus Doctor Blade on the printing press ensure that you get the longer life excellent wiping action from the doctor blade
• The blade holder must be clean at all times .No ink sedimentation between the Blade and the blade holder should be permitted
• Use a counter/support blade from 0,5mm thickness, preferably a stainless or CARBON Strips type
• Cut the counter/support blade at ends to 45 degree angle. (To reduce wear from printing cylinder ends)
• Make sure the doctor blade is mounted straight in holder, so no waviness is observed. Check along the blade from the side
• When bolts/screws are used for clamping blade holder, tighten from center bolt/screw and outwards crosswise. Use a torque-wrench if possible. Check so all treads are OK and that no bolts/screws are missing
• Use measuring tape or other precise measuring tool for setup of blade extensions. (Preferably use fixed end-stops/pins in bottom of the blade holder clamping area)
• Check doctor blade edge for damages by lightly running your finger nail along the blade edge. Be careful, it's sharp!
• Attach the doctor blade holder securely to machine.
• Try to achieve a 55-65 degree contact angle between doctor blade and cylinder (less doctor blade pressure is needed)
• Use a blade pressure of 0,5-1,2 bar, increase more if there is no clean wipe, but try to use as low blade pressure as possible. (Less blade flex and blade/cylinder wear)
• Set blade oscillation to 20-30mm. If your machine doesn't allow that long stroke, use the max stroke length. Make sure oscillation stroke is smooth. No jerks or stops
• If there is a need to use a slur-stick, use one with a very sharp tip. Then only low pressure force is needed. Recommended is to use a round wooden stick that can fit into a pencil sharpener for re-sharpening

The support Blade must be clean and uniform the and should be mounted on top of the doctor blade as shown above figure . To permit flexibility and proper lubrication , the thickness of the support blade between 0,5 mm .

The Distance between the doctor blade tip and the doctor blade tip should be between 3-5 mm .

Flexo Settings
Use a high quality doctor blade with dimensions suitable for your ink and anilox type.

• Check your doctor blade chamber/holder so it is straight, clean and without damages, especially in the clamping area
• If screws/bolts are used for clamping; make sure all screws/bolts are present and that threads are in good condition both on screw/bolt and in chamber/holder
• Make sure the doctor blade is mounted straight and that no waviness in the blade is observed
• If a chamber with end seals is used, let the doctor blade length reach 50-70% onto the seal width
• When screws/bolts are used for clamping chamber/holder, tighten from center and out crosswise
• Check so doctor blade extensions are correct
• Examine doctor blade edge for nicks by lightly running your finger nail along the blade edge. Be careful, it’s sharp!
• Attach the doctor blade chamber/holder securely to machine
• Check so your anilox roll is clean and in good condition
• Make sure chamber is aligned to anilox roll, both vertically and horizontally
• Apply lowest chamber/holder pressure needed (less doctor blade flex and blade/anilox wear). Only press so camber doesn’t leak and doctor blade wipe correctly at production speed.