Low Energy Printing P1004: Open Source / Open Architecture.

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Presentation transcript:

Low Energy Printing P1004: Open Source / Open Architecture

2 Printing Architecture Input (Energy) Central Processing Unit Paper Feed Printer Head Printer Driver Output (Printed Paper) Interface Xerography Thermal Inkjet Piezoelectric Inkjet On-Demand Continuous Data Stream

Who? Team Members –Dean Culver –Shawn Hoskins –Derek Meinke –Tim Salter Stakeholders –John Knapp, Research Fellow, Xerox Corp. – Marking Elements & Integration Lab –Rochester Institute of Technology –End user: Party that needs printing technology, but has very little electrical infrastructure to support it Faculty Guides –Gerry Garavuso –Bill Nowak –Dr. Marcos Esterman 3

4 What? Optimize Performance; Minimize Consumption Identify areas of significant power consumption Innovate and Substitute Key Terminology Xerography (Electrophotography) Piezo Applications Injet Printing Challenges What has already been done before? Fuser Test Beds and Optimization Electrophotographic Transfer Station

5 Where? Previous Locations of Research Past MSD projects stored on EDGE Prototype and test fixtures at RIT Current Technology Development Continuing research at manufacturer locations and academic institutions Research performed by company employees and students alike Widespread knowledge base Universities Research facilities

When? Utilization –End product could be utilized immediately –Growing demand for technology in less developed countries with little infrastructure Previous Projects –P09503: Electrophotographic Development and Transfer Station ( to ) –P09505: Low-Energy Printing ( to ) Current Project –P10505: Concurrent Low-Energy Printing ( to ) Innovation & Creativity Festival –May 1,

7 Why? Importance of Technology Developement Multidisciplinary involvement (ME, EE, IE) New product design is the life blood of competing companies Stakeholder interests: students, manufacturers customers Impact on Current Society Push towards low energy technology RESOURCES RIT RIT neighbors graphic imaging companies Involves multiple engineering departments Opportunity to prepare students for career after graduation Low-energy is a hot industry

8 How? Previous approaches to this concept include the following: –Extensive fuser research; measurement and PUGH analysis –Attributes of a successful project –Attributes of an unsuccessful project –“How to approach our project…”

9 Xerography (Electrophotography)

10 Xerography (cont.) Energy Demands (Standard Xerox 50 ppm Unit) Illumination and Document Handling Controls and Solonoids Internal Losses Electronics User Interface Mechanical Systems Photoconductor and Image Transfer Energy Demands (Standard Xerox 50 ppm Unit) Illumination and Document Handling Controls and Solonoids Internal Losses Electronics User Interface Mechanical Systems Photoconductor and Image Transfer

Thermal Inkjet Printing Print cartridge has 300 to 600 ink nozzles Each nozzle is electrically heated The ink is an aqueous solution The heat causes the ink to boil, which forms a bubble inside the nozzle The bubble propels the ink forward out of the nozzle toward the paper The contraction of the bubble and the ink’s surface tension pulls more ink from the reservoir 11

12 Piezoelectric Continuous Printing Electrically Reactive Material Deflection caused by voltage (and vise versa) Pulse generation (similar to thermal inkjet) causing ink release Ink droplets charged while exiting nozzle Continuous stream with interval between droplets; wave effect Application of Ink Continuous discharge, unlike piezoelectric on-demand Electrically charged ink is deflected by electrical field between plates Charge intensity determines placements of ink droplets Up to ~165,000 drops per SECOND! Continuous Ink Discharge Ink is deflected by plates onto media Unused droplets are collected by gutter and recycled Continuous discharge prevents clogging of ink nozzle

Piezoelectric Continuous Printing Applications Wide range of media materials Ink deflection pattern compensates for different shapes Often used to print expiration dates, bar codes, labels Commercial/industrial applications; high-speed printing

The Piezoelectric Process

Piezoelectric Continuous Printing Benefits Prints on many types of materials Allows for large distance between media and ink nozzle Prints on materials of different textures and shapes High speed Low maintenance (low risk of clogging) Disadvantages High cost of print head Large size, complexity Limited print resolution ENERGY: Only a small fraction of ink droplets are applied to media Unused ink droplet ejection Ink return pump

Piezoelectric On-Demand Printing Piezoelectric materials deform under electric potentials –Process can be reversed Uses up to 600 nozzles, similar to thermal inkjet Piezoelectric material sits inside ink chamber Material vibrates and deforms under electric potential Ink becomes forced out of nozzle Many different inks can be used Epson currently holds patent on printing technology 16

17 Low Energy Printing Projects P09505 –Fusing System –Low-Power, Non-Thermal –Conclusion: Conventional Fusing System Optimized P10505 –In Progress –Conclusion: Collaboration Mutually Advantageous

18 Experimental Printing Test Fixture P07501: Laser Fuser Test Bed –Continuously variable to simulate different conditions –Test reactions of toners –Effects of speed, pressure, and temperature –All aspects combined determine image quality Issues and Resolutions –Unable to accurately measure applied toner temperature –Bring toner temperature to equilibrium before application –Accurate pressure profile curve concerns –Use linearly actuated cam to vary pressure

19 Experimental Printing Test Fixture P08501: Roller Fuser Test Bed –Goal: Develop methods to improve current printing systems –Combine research and development from past project –Rollers resemble current in-use printers Control Conditions –Vary pressure, temperature and speed of rollers –Test fusibility of toner under different conditions –Difficult to precisely control roller pressure –Suggest more refined linear actuators

20 The MSD “State of the Art” Fuser Optimized as of ’09 Electrophotography Attributes Not Yet Investigated Typical Ink Application Systems (i.e. jet interruption) Not Yet Investigated *P09505: Low Energy Printing (Xerox), Joshua Jones and Team