Understanding_ the_Cleaning_Process_for_Automatic_Stencil_Printers - 第29页
Summar y • Und er s t encil wiper is th e f ir s t defense against defects • Matc hing t he wi per pr of i le and f requ enc y to t he indi vidu al boar ds – whe re one s ize does not f i t all • The wiper like the print…
Preventive Maintenance
• Check the owner's manual for preventive maintenance for your individual machine
• Replace Vacuum filters based on requirements
• Check main drive belts/chains for proper tension
• Clean all bushings and remove any foreign material from wiper assembly
• Check and replace vacuum hosing as needed especially if using solvent
• Remove plenum and remove any material build up in trough – check plenum bow if present
• Inspect plenum for damage – verify match of plenum to stencil/foil size
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Understanding the Cleaning Process for Automatic Stencil Printers
Random Stuff
• Motion additions to wiping process has shown no improvement in wiping
• Ultrasonic
• X- Motion
• Nano- coating of stencils
• Confusion on Aculon Nano-Clear – reduces wipes/ buildup of paste – not focused on release
• Nano-coating will wear from the bottom of stencil
• New coating methods – Plasma coating / baking improve coating life
• Paper wash
• No input
• Paperless wiper development
• Effectiveness of wipe
• How to indicate alternative wiping material is contaminated
• TBD
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Understanding the Cleaning Process for Automatic Stencil Printers
Summary
• Under stencil wiper is the first defense against defects
• Matching the wiper profile and frequency to the individual boards – where one size does not fit all
• The wiper like the printer in general – process as good as the material applied
• Base wiper paper used on performance not cost
• Solvents when used correctly can contribute a positive influence to the stencil cleaning process
• Keep up with wiper PM for optimum performance
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Understanding the Cleaning Process for Automatic Stencil Printers