Electrophotographic Development and Transfer Station Team Members Name Discipline Role David Schwartz ISE Team Lead Warning Signs Ruth Gay ME Paper Delivery System Phillip Lopez ME ID: 574103
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Slide1
P09503Electrophotographic Development and Transfer StationSlide2
Team Members
Name
Discipline
Role
David Schwartz
ISE
Team Lead – Warning Signs
Ruth Gay
ME
Paper Delivery System
Phillip Lopez
ME
Ozone Filter
Dan Summers
ME
ME Support
Rachel Chrash
EE
LED Exposure System
Min-Shi Hsiao
EE
PC Potential Measurement
Andrew Kearns
EE
Transfer Drum Speed Measurement, Camera System
Sasha Oliver
CE
User InterfaceSlide3
Project BackgroundProject FamilyPrinting and Imaging Systems Technologies Track
Customer
Print Research and Imaging Science Modeling Laboratory (PRISM
)
The Print Research and Imaging Systems Modeling lab will serve as a conduit between industry and academia, working to evaluate and anticipate the print systems research needs of printer and printing product companies, and directing relevant projects to researchers and students in the areas of Printers & Displays, Color Science, Vision Science, Systems Engineering, and Printing.
Contact
: Dr. Marcos
Esterman
– Associate Professor, Industrial and Systems Engineering Slide4
Project DescriptionWorking Electrophotographic station to
vary both the printing material and the printing process parameters as to better understand and improve the performance of similar printing systems
.
End Users
PRISM Lab
Center for Imaging Science
Deliverables
An
inventory and status of current sub-systems, including needed support systems.A working Electrophotographic Station.Demonstrably improved device safety.An improved user interface (includes control and display functions)Device documented for use, maintenance and upgrade of the device (User & Lab Technician Manual)Demonstrably Improved Sensing and Control SubsystemSlide5
What is Electrophotography?Electrophotography
is base technology that is used in many modern day copiers and printers
Six Step Process to transfer an electrostatic image to a final printed page
Charging
Exposure
Development
Transfer
Fusing
CleaningP09503 only includes the first fourSlide6
Electrophotographic and Development StationSlide7
Electrophotographic and Development Station
Charging
Exposure
Development
TransferSlide8
ConsultantsRIT Faculty
Professional
Jonathon
Arney
,
Ph.D
Center
for Imaging
SciencePhysical & Optical MeasurementsSusan Farnand, Ph.DCenter for Imaging ScienceColor and Vision ScienceJohn D. WellinMechanical EngineeringControl SystemsMarcos Esterman, Ph.DIndustrial and Systems EngineeringProduct & Process Development
Bill Nowak – Xerox
Principle Engineer
Motion and Quality Systems
Gregory Miller – Kodak
Software EngineerSlide9
Customer Needs & Functional Diagram1. Is Operational
2. Is Safe
3. Minimize user Intervention
4. Can Monitor Key Process Parameters
5. Can operate and monitor machine from one interface
6. Easy to learn to
useSlide10
Ozone Fan/Filter AssemblyReduce and Secure Ozone Test Stand
Ozone hazardous to humans if exposed to enough
Law states maximum ozone in A/C Space is 0.05
ppm
>0.200
ppm
increases risk of health issues
Two Options
Verify current system or Implementation of further improvement to control Ozone LevelsSlide11
Monitoring Potential on PhotoconductorMonitoring potential of photosensitive material will help characterize exposure input noise source
Charge
v.
Exposure
plot after
measurement can be viewed
Dark Decay Research PossibleSlide12
LED Exposure SystemLED Print Heads used in copiers and printers to expose Photosensitive Material are commonly used
LED Exposure system to replace current incandescent system
Advantages
More versatile and reliable light source
Low Power Consumption
Longer Bulb Life
No potential for overheat
Inexpensive to replaceSlide13
Paper Delivery SystemExisting roller system requires manually catching paper after application of toner from roller
Possible risks of manual handling
Shock Short from High Voltage Roller
Pinch Point of Rollers and Pneumatics
Marred Image QualitySlide14
High Visibility Warning SignsPurpose of warning signsAlert user to specific hazard
Identify how hazard can be avoided
Current signs do not accomplish this
Remove current warning signs
Replace with ISO designed signs
Add new ISO signs where neededSlide15
Camera SystemPurpose is to gain understanding of how image is developed onto photoreceptive material
Photoreceptive material imaged after development and before transferSlide16
Transfer Roller Speed MeasurementSpeed of transfer roller critical to timing control and image qualityNeed to assure that transfer drum rotates at the same speed as the moving photoconductor as to not elongate/condense the image
Need to assure that the transfer roller will be in the proper position for transfer to paperSlide17
Labview Control InterfaceCurrent control system is done via PLCBetter solution needed to replace current system with a new user friendly interface
Automatic and Manual Setting
Labview
uses dataflow programming to define inputs/outputs and execution sequence of the virtual instrument
Connect devices directly to DAQ to allow for more robust controlSlide18
Technical Risk AssessmentData Acquisition Implementation – Coding Complications / Integration with SubsystemsMitigation: Primary Focus During SD II
Obtaining Optimal Parameters (>10) for EP Process
Mitigation: Experimental Design to optimize parameters, Consult with Xerox and CIS
Toner and Developer Contamination
Mitigation: Implement Air Filtration System and Warning SignsSlide19
Current State of DesignCurrent design meets all feasible customer needsCustomer understands unfeasible needs
Current design meets all engineering specifications
Budget = $1500
Total Expenditures < $900
Schedule
On Schedule, no Design Delays Slide20
Product Development Process PhasePhase 0: PlanningCompleted
Phase 1: Concept
Development
Completed
Phase 2: System Level
Design
Completed
Phase 3: Detailed Design
CompletedPhase 4: Testing and RefinementWill begin in SD IISlide21
Senior Design II Schedule and Milestones
Milestone
Duration
Completion Date
User Manual Complete
14 Days
12/18/08
Ozone Decision
39 Days1/9/09PC Potential Measurement Device Complete35 Days2/10/09LED Complete29 Days2/2/09Paper Delivery System Complete
43 Days
2/20/09
Warning Signs Complete
18 Days
1/7/09
Labview
/Camera/Speed Complete
73 Days
3/25/08Slide22
Questions