P10511: Miniaturization of Xerography Derek Meinke (ME, PM) - PowerPoint PPT Presentation

P10511: Miniaturization of Xerography Derek Meinke (ME, PM) Matthew Liff (ME) Tony Zhang (EE) Zaw Htoo (ISE)

Agenda • Project Description • Final Design Concept • System Architecture • Project Development • Current State of Design • Summary of Test Results • Conclusions • Questions

Project Description • The scope of P10511 is to create a test fixture that will allow the use of various charging devices along with multiple diameters of photoreceptors. • Test affect of charge uniformity with various device configurations and input parameters. • Obtain device characteristics using I-V curve.

Project Description Engineering Specifications 14% 13% 12% 11% 10% 9% 8% 7% 6% 5% 4% 3% 2% 1% 0%

Final Design Concept Photoreceptor (84mm) Charger Mount Erase Mount Coronode/Grid/Plate Power Supplies Threaded rod end for ESV easy changeability

Final Design Concept

System Architecture

Project Development Process Define Needs and Concept Generation Detailed Design Specifications and Selection -Concept Generation and -Part Drawings -Define Customer Needs sketches -Bill of Materials -Develop Eng. Specifications -Concept Screening and -Calculations -Perform QFD Analysis selection MSD 1 MSD 1 MSD 1 Weeks 6 - 10 Weeks 1 - 2 Weeks 3 - 5 Building Testing -Material Acquisition -Uniformity Plots -Part Machining -I-V Curves -Design Adjustments -LabVIEW Optimization -Wiring Connections -Part Modifications MSD 2 MSD 2 Weeks 1-8 Weeks 9-10

Current State of Project • Testing is complete – Smooth uniformity plot – I-V Curves with slope of around 0.6 • Photoreceptor sizes – Only tested 84mm and 30mm diameters (largest and smallest) – The 60mm and 40mm diameters are unavailable • Budget – $548.21 was used of $2000.00 available – Includes extra material for PR endcaps – Donated equipment cost was tracked but not purchased on budget

Summary of Results Uniformity Test IV Test Grid Voltage: -655V Grid Voltage: -655V ESV Readings/PR Rotation: 1 Voltage Step: 20V ESV Readings/PR Length: 50 Speed of PR: 0.1 Intercept: -722.6 Slope: -0.6 Average Reading: 497.16V Range of Uniformity: 92.28V

Summary of Results Uniformity Test -665V Applied Slope of Mean of Mean of Average Range of Voltage Speed (m/s) Sample Voltage Uniformity Across Voltage (V) Uniformity (V) Range (V) P/R IV Test -665V Applied 1 -481.68 56.64 -0.03 Voltage Voltage Theoretical 2 -497.16 92.28 0.03 Slope Increment Sample Intercept Intercept 0.1 3 -473.48 68.84 0.06 -466.08 119.11 (uA/V-m) (V) (V) Error (%) 4 -454.52 160.10 0.06 2.06 1 -678.7 -0.66 5 -423.56 217.70 -0.02 6.47 1 -435.14 59.57 0.01 2 -708 -0.64 2 -477.66 47.36 0.03 5.71 3 -703 -0.64 0.2 3 -478.72 86.91 0.20 -470.15 81.34 0.89 4 -659.1 -0.66 4 -460.20 156.70 -0.04 2.78 5 -683.5 -0.64 5 -499.04 56.15 0.10 10 34.29 6 -893 -0.47 1 -380.51 68.84 0.22 1.65 7 -654 -0.66 2 -437.29 203.60 0.42 4.21 8 -693 -0.62 0.3 3 -393.18 162.50 0.18 -407.51 132.38 34.36 9 -893.5 -0.51 4 -424.68 64.45 0.10 4.26 10 -693.3 0.62 5 -401.90 162.50 0.12 2.71 11 -683 -0.61 1 -285.13 105.90 0.31 2.71 1 -683 -0.64 2 -312.54 147.40 0.40 8.66 0.5 3 -225.82 96.67 -0.11 -261.91 120.86 2 -722.6 -0.6 4 -257.52 167.40 0.49 20 2.06 3 -678.7 -0.63 5 -228.54 86.91 0.12 5.73 4 -703.1 -0.64 1 -153.06 239.20 -0.59 7.92 5 -717.7 -0.6 2 -152.50 264.10 -0.54 1 3 -140.68 279.70 -0.65 -140.02 229.44 4 -126.10 182.60 -0.39 5 -127.74 181.60 -0.36

Conclusions • Design Modifications – Charger mount slots were opened on PR end for increased charger range of motion – Original retaining mechanism for PR compression spring used c-clip; changed to threaded rod with nut for assembly considerations – Cut down spring by 3 loops for lower compression force and easier assembly – Shaft mounts now use gussets over flimsy L-brackets for alignment – Individually sized endcaps vs. v-flange design – Dovetail design optimized for machinability • Improvement ideas – Lengthen charger mounting assembly for less interference – Implement third shaft mount on free end to eliminate cantilever design – Alligator clips with higher breakdown threshold – Make charger slide plastic to eliminate arcing problems

Further Questions?