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

SLIDE 1

P10511: Miniaturization of Xerography

Derek Meinke (ME, PM) Matthew Liff (ME) Tony Zhang (EE) Zaw Htoo (ISE)

SLIDE 2

Agenda

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

SLIDE 3

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.

SLIDE 4

Project Description

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

Engineering Specifications

SLIDE 5

Final Design Concept

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

SLIDE 6

Final Design Concept

SLIDE 7

System Architecture

SLIDE 8

Project Development Process

Define Needs and Specifications Concept Generation and Selection MSD 1 Weeks 1 - 2 MSD 1 Weeks 3 - 5 Detailed Design MSD 1 Weeks 6 - 10

• Define Customer Needs
• Develop Eng. Specifications
• Perform QFD Analysis
• Concept Generation and

sketches

• Concept Screening and

selection

• Part Drawings
• Bill of Materials
• Calculations

Building Testing

• Material Acquisition
• Part Machining
• Design Adjustments
• Wiring Connections

MSD 2 Weeks 1-8

• Uniformity Plots
• I-V Curves
• LabVIEW Optimization
• Part Modifications

MSD 2 Weeks 9-10

SLIDE 9

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

SLIDE 10

Summary of Results

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

SLIDE 11

Summary of Results

IV Test -665V Applied

Voltage Increment (V) Sample Voltage Intercept (V) Slope (uA/V-m) Theoretical Intercept Error (%)

10 1

• 678.7
• 0.66

2.06 2

• 708
• 0.64

6.47 3

• 703
• 0.64

5.71 4

• 659.1
• 0.66

0.89 5

• 683.5
• 0.64

2.78 6

• 893
• 0.47

34.29 7

• 654
• 0.66

1.65 8

• 693
• 0.62

4.21 9

• 893.5
• 0.51

34.36 10

• 693.3

0.62 4.26 11

• 683
• 0.61

2.71 20 1

• 683
• 0.64

2.71 2

• 722.6
• 0.6

8.66 3

• 678.7
• 0.63

2.06 4

• 703.1
• 0.64

5.73 5

• 717.7
• 0.6

7.92 Uniformity Test -665V Applied

Speed (m/s) Sample Average Voltage (V) Range of Uniformity Slope of Voltage Across P/R Mean of Voltage (V) Mean of Uniformity Range (V)

0.1 1

• 481.68

56.64

• 0.03
• 466.08

119.11 2

• 497.16

92.28 0.03 3

• 473.48

68.84 0.06 4

• 454.52

160.10 0.06 5

• 423.56

217.70

• 0.02

0.2 1

• 435.14

59.57 0.01

• 470.15

81.34 2

• 477.66

47.36 0.03 3

• 478.72

86.91 0.20 4

• 460.20

156.70

• 0.04

5

• 499.04

56.15 0.10 0.3 1

• 380.51

68.84 0.22

• 407.51

132.38 2

• 437.29

203.60 0.42 3

• 393.18

162.50 0.18 4

• 424.68

64.45 0.10 5

• 401.90

162.50 0.12 0.5 1

• 285.13

105.90 0.31

• 261.91

120.86 2

• 312.54

147.40 0.40 3

• 225.82

96.67

• 0.11

4

• 257.52

167.40 0.49 5

• 228.54

86.91 0.12 1 1

• 153.06

239.20

• 0.59
• 140.02

229.44 2

• 152.50

264.10

• 0.54

3

• 140.68

279.70

• 0.65

4

• 126.10

182.60

• 0.39

5

• 127.74

181.60

• 0.36

SLIDE 12

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

SLIDE 13

Further Questions?