Section 10, Team 3:Caroline Suni, Clayton Dickerson, Alex Bedrin, and Donovan Killeen

*Design Project II:Velocity Measurement Mechanism

*ABSTRACT

*Designed and built a prototype of a velocity measurement mechanism*Installed directly into Xerox iGen4*Current mechanism is imprecise*Mechanism can measure velocity +/- 0.25%

tolerance*Key points:*easy to install*maintenance*cost effective

*PROCESS/INTRODUCTION

*Generated 5 unique designs for measuring velocity within the iGen4*one design selected

*Winning design implements the use of a roller, notch and sensor *Prototype, 3d models and working drawings were

created

*DESIGN TASK

*Problem Statement*Current device yields rough estimates

*Mission Statement*Design a device that measures velocity between

250 to 750 mm/s within a tolerance of +/- 0.25%*Design Specifications*Precise velocity*Cost effective*Easy manufacture, installation and maintenance*No impact on paper speed*Appropriate size

*DESIGN PROCESS

*GANTT CHART:

*Concept Generation

Double motion sensor

Roller notch sensor

Rolling notch switch

Single motion sensor

Ultrasonic sensor

*Design Matrices

Selection Criteria Single Motion Sensor Double Motion Sensor Roller Notch Switch Roller Notch Sensor Ultra Sonic Sensor(reference)

Cost Effectiveness 0 - + - +Precision 0 + - + -Maintenance 0 0 + 0 0Size 0 - + + 0Ease of Manufacture 0 0 + 0 0Ease of Installation 0 - + - 0

Sum +'s 0 1 5 2 1Sum 0's 6 2 0 2 4Sum -'s 0 3 1 2 1

Net Score 0 -2 4 0 0Rank 3 4 1 2 2

Continue? no no yes yes yes

*Second Design Matrix

Selection Criteria Weight (%) Rating Weighted Score Rating Weighted Score Rating Weighted Score

Cost Effectiveness 0.15 4 0.6 3 0.45 3 0.45Precision 0.3 2 0.6 5 1.5 2 0.6Maintenance 0.1 3 0.3 3 0.3 2 0.2Size 0.25 3 0.75 3 0.75 2 0.5Ease of Manufacture 0.1 3 0.3 2 0.2 2 0.2Ease of Installation 0.1 3 0.3 3 0.3 3 0.3

Total Score 2.85 3.5 2.25Rank 2 1 3

Continue? no YES no

ConceptsRoller Notch Switch Roller Notch Sensor Ultra Super Special Sonic Sensor

*Trade Studies

*Lasers are most accurate form of measurement*Most cost effective*Most efficient

*Rotating notch best way to measure velocity of paper*Design much more accurate than current

igen mechanism

*Best Design Selected

*Utilizes dual set of frictionless rollers*Located after drive roll*Spin according to speed of paper

*Notch connected to rod breaks plane of laser*Occurs on each pass of the notch/roller system

*Program measures average rotations per second and derive the velocity of the paper

*PROTOTYPE

*prototype

*Solidworks models

Prototype

Velocity Roller

*ENGINEERING ANALYSIS

*Working Mechanism:*Printer begins print cycle*Laser activates

*Paper is fed into printer and cycle begins*Paper passes velocity measuring mechanism, and spins a

“frictionless” roller*Notch on the end of the roller breaks the plane of the

sensor as the paper spins it*Sensor measures time intervals of the notch rotating

around the cylinder exactly once*Program divides this time by known circumference of rotating

notch* … yielding an accurate average speed

*Cost Analysis

Cost based on estimations with help from:-Mcmaster-carr (http://mcmaster.com)-Rubber Crumb, Recycled Rubber(http://www.tirerecyclingcrumbrubbershredder.com)

Part Material Material CostAmount of Material Cost Quantity

Total Cost

(cubic inch or per item) (cubic inches) ($) ($)Roller Rubber $0.44 11.5 5.06 2 10.12Lazer $60 60.00 1 60

Sensor $250 250.00 1 250

Notch Stainless Steel$2.18

0.2 0.44 1 0.44

Rod Stainless Steel$2.18

1.325 2.89 2 5.777

Total Cost : $326.34

*Design Features

*Cost Effective*Easy Maintenance*Compact Size, only 1.5 x 1.75 x 3.25

inches*Easy to Manufacture*Easy to install*Accurate

*SUGGESTIONS

*Decreasing the diameter of the rod holding the notch*More rotations = more accurate*Closer estimation of rotations

*CONCLUSIONS

*Team 3 designed and built a prototype of a system that measures the velocity of paper in the igen 4*Velocity information used to make

adjustments in the printing path*Less errors with image recognition

*ACKNOWLEDGEMENTS &

REFERENCES

*Xerox*Xinli Wu*Our TA, Bill

*Full Xerox igen 4 demo: http://www.youtube.com/watch?v=R6HBoQTPhdU

Thank you for watching our presentation

*Questions?