P10511 Miniaturization of Xerography Home Page
AMORFIX - A Morphing Fixture for Photoreceptor Charge Testing
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Over the past decade the cost of xerographic digital printer hardware has continued to drop while at the same time print quality, print speed, and reliability has continuously improved. Much of this cost reduction is related to what we will call "The Miniaturization of Xerography". One "figure of merit" gauge of this miniaturization is the size of the photoreceptor required to produce a given print rate, (Pr /PPM). It turns out that when tracked over an extended timeframe, the diameter of photoreceptor drum required to produce a particular print rate has fallen by about a factor of two per decade over the last three decades. The current state requires about a 24mm diameter photoreceptor drum for <40 prints per minute, (ppm), a 40mm diameter photoreceptor drum for > 40ppm, and about an 80mm diameter drum for >80ppm. This miniaturization has been vital to offering low cost digital color printing where the number of printer components is multiplied by the number of colors. This miniaturization is the result of several innovations and advances in sub-system processes, new materials, and process controls. For example: the wear rate of new photoreceptor materials has dramatically improved, thus allowing smaller photoreceptors to be used, with small photoreceptors other sub-systems followed suit. For example the development sub-systems now use low cost high tolerance rolls and semi-conductive or conductive developers that significantly reduced the waterfront for development subsystems, and finally laser exposure requires much less space than early bulky optical systems. The photoreceptor charging system has also undergone significant changes over this time frame. The major improvement has been the displacement of bulky high voltage corona emitting devices for compact bias charge rolls (BCR's), particularly for low end office and personal printers. While there are tradeoffs in reliability, cost, size, and footprint for corona vs. BCR devices that ultimately determine selection for any particular printer architecture there continues to be a need for reduced footprint for charging devices, particularly for high speed applications. Project Description: This initial project seeks to design a xerographic charging test fixture that can be used to evaluate these tradeoffs for new emerging and experimental high speed BCR's and compact solid state corona charging devices. The fixture will be fully automated with digital data collection and be used to explore selected experimental charging device configurations and technologies. It will be capable of measuring charging rates on simulated dielectric drums, under numerous critical parameter conditions such as photoreceptor speeds and other spacing and applied voltage set up settings. It will use the waterfront required to charge a photoreceptor to a uniform surface potential per process speed (mm/sec) as its miniaturization figure of merit. For an introduction to this project, click on the following link for the Project Readiness Package. More detailed information will be discussed in class with your Guide and Customer. Background reading:
Week 1 Introduction:
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Team Unavailability and Meeting Times.xls Week 1 Trek 610C.pdf - Trek High Voltage Supply Manual Week 2 Customer House of Quality rev1.xlsx Customer House of Quality rev2.xlsx Week 2 Status Update Presentation.pdf Week 3 Week 3 Status Update Presentation.pdf Week 4 Objective and Function Tree.pptx Week 4 Status Update Presentation.pdf Week 5 Systems Design Review Meeting Minutes.docx Week 6-8 CAD Part Screenshots - CAD Assembly as of Week 8 Week 8 Status Update Presentation.pdf Week 9 CAD Part Drawings - Contains ALL up to date drawings Week 10 CAD Part Screenshots Wk10 - CAD Assembly as of Week 10 |
MSDII Team Availability Sheet.xlsx MSDII Gantt Chart rev1 - from MSDI Week 10 Week 1 Purchase Requisition McMaster.docx Purchase Requisition Online Metal Store.docx Purchase Requisition Stock Drive Products.docx Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8 Week 9 Developed Labview Interfaces Week 10 |
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- Node updated 2010-05-21 12:17 by tcz3604