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Background. Electrophotographic Printing (EP) test rig originally from Kodak P09503 modified for improved usability and automation LabView controls implemented for automation Has station for major steps: Charging, Exposure, Toner, Transfer Fusing occurs on a different rig

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Background

Background

  • Electrophotographic Printing (EP) test rig originally from Kodak

  • P09503 modified for improved usability and automation

  • LabView controls implemented for automation

  • Has station for major steps:Charging, Exposure, Toner, TransferFusing occurs on a different rig

  • Exposure step is performed with a negative. Cannot print file from computer.

  • Our Problem: Test pattern cannot be specified from computer


Ep process part 1 of 2

EP Process (Part 1 of 2)

Stepper motor to turn screw to move carriage

Photoconductor carriage

Screw to move carriage

Negative

Charging Station

Exposure Station


Ep process part 2 of 2

EP Process (Part 2 of 2)

Transfer drum

Tray for paper

Transfer Station

Toner Station

Fusing: On one of several other rigs, heat and pressure are applied to fuse toner to paper.


Stakeholder interviews

Stakeholder Interviews


Voice of customer needs

Voice of Customer - Needs

  • Accepts computer input to specify test pattern

  • Integrates into LabView software

  • Fits into 10"x15"x12" available space of current exposure system

  • Uses current stepper motor if motion is required

  • 1200*20±1 DPI Resolution (1200 DPI target, 600 DPI min)

  • Controls exposure time or intensity

  • Exposes a min area of the 5"x9" photoconductor

  • Built within budget ($2-3K)

  • Powered by available sources (wall outlet, current power supply)


Moving forward possible solutions

Moving Forward - Possible Solutions

  • Xerox HiQ LED Print Head

  • Can achieve resolutions of 1200 x 2400 dpi

  • The LEDS selectively flash to create a pattern of dots on the photo receptor drum

  • Laser Printing assembly

  • Common laser printers achieve 1200 dpi

  • Laser scans photo receptor drum as it rotates, creating the latent image


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