Position Verification Team Members: Matt Hagon Michael Lee Jennifer Egolf Christopher Pawson Project Background Properly calibrated tachometers can detect small differences in surface velocity across a system. Used as diagnostic tool to reduce the downtime of systems. Currently a lathe used for calibration. Problems: Cannot calibrate tachometers relative to each other Not portable Sponsors: Jose Vazquez, Ted Myrick, Patrick Buehler; Advisor: James Glancey Metric Target Value % variation of speed < 0.05% Size < 3’ x 3’ x 3’ & < 90 lbs Set up time < 5 minutes # of tachometers mounted at least 4 # of attainable speeds at least 3 Ranked Customer Wants Top 5 Design Specifications Project Goals Design and manufacture a portable device for the relative calibration of multiple surface tachometers. Final Concept Tachometers mounted to make contact with disc Disc rotated using a motor and gearbox Multiple tachometers calibrated simultaneously to surface velocity of disc Motor speed selected through user interface Prototype Tachometer Motor Gearbox Shaft and disc assembly Eccentricity Testing Wheel and shaft rotated on v-blocks Radius variation measured with dial gage Confirmed radius variation will not cause speed variations above design specifications Position Testing Tachometers of various sizes positioned on disc and shaft assembly Confirmed that 4 tachometers of all sizes can be mounted simultaneously Complete System Test Method: Mount surface tachometer on rotating disc Note speed variation in system Tachometer speed variation with gearbox: Tachometer speed variation without gearbox (just moto effect): Conclusion Use of current gearbox creates unacceptable speed variations Modifications to system Eliminate gearbox for direct drive system Tachometers mounted directly to extended shaft Calibration of High- Resolution Surface Tachometers portable; 23% adaptable; 13% constant speed; 36% inexpensive; 4% durable; 5% ease of use; 10% adjustable; 9% Switch for speed selection Drive Powe r supp ly Motor connects to controller with user interface Motor Disc Tachomete rs Large speed variations Insignificant variations in speed Proof of Concept Tachomete rs Tachomete rs Speed Frequency Speed Amplitude Speed Amplitude Speed Frequency

Position Verification

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Calibration of High-Resolution Surface Tachometers. Team Members: Matt Hagon Michael Lee Jennifer Egolf Christopher Pawson. Sponsors: Jose Vazquez, Ted Myrick, Patrick Buehler ; Advisor: James Glancey. Proof of Concept. Project Goals. Final Concept. - PowerPoint PPT Presentation

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Position Verification

Team Members: Matt Hagon Michael Lee

Jennifer Egolf Christopher Pawson

Project Background Properly calibrated tachometers can detect small differences in surface velocity across a system. Used as diagnostic tool to reduce the downtime of systems. Currently a lathe used for calibration.

Problems:Cannot calibrate tachometers relative to each otherNot portable

Sponsors: Jose Vazquez, Ted Myrick, Patrick Buehler; Advisor: James Glancey

Metric Target Value% variation of speed < 0.05%

Size < 3’ x 3’ x 3’ & < 90 lbs

Set up time < 5 minutes# of tachometers

mountedat least 4

# of attainable speeds

at least 3

Ranked Customer Wants

Top 5 Design Specifications

Project Goals Design and manufacture a portable device for the relative calibration of multiple surface tachometers.

Final Concept Tachometers mounted to make contact with disc Disc rotated using a motor and gearbox Multiple tachometers calibrated simultaneously to surface velocity of disc Motor speed selected through user interface

PrototypeTachometer

Motor

Gearbox Shaft and disc assembly

Eccentricity Testing Wheel and shaft rotated on v-blocksRadius variation measured with dial gage Confirmed radius variation will not cause speed variations above design specifications

Position Testing Tachometers of various sizes positioned on disc and shaft assembly Confirmed that 4 tachometers of all sizes can be mounted simultaneously

Complete System Test Method:

Mount surface tachometer on rotating disc Note speed variation in system

Tachometer speed variation with gearbox:

Tachometer speed variation without gearbox (just motor effect):

Conclusion Use of current gearbox creates unacceptable speed variations Modifications to system

Eliminate gearbox for direct drive systemTachometers mounted directly to extended shaft

Calibration of High-Resolution Surface Tachometers

portable; 23%

adaptable; 13%

constant speed; 36%

inexpensive; 4%

durable; 5%