TEAM 18MINIATURE BIAXIAL TESTING DEVICE

WEEK ELEVEN REPORT – MARCH 28TH, 2012

Members: Leah Pruzinsky, Stephany Santos, Christine Vogel

Sponsor: Dr. Wei Sun

Saline Bath Temperature Study• Wanted to see how much temperature changed in our saline bath to better determine

how to heat our device

y = -0.0063900x + 35.0298061

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Trial 1

Trial 1

Linear (Trial 1)

y = -0.0067732x + 34.1632688

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Trial 2

Trial 2

Linear (Trial 2)

y = -0.0068946x + 35.0059948

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Trial 3

Trial 3

Linear (Trial 3)

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Overlapping

Trial 1 Trial 2

Trial 3 Linear (Trial 3)

Average heat loss :-24.069 degrees C / hr

LabVIEW Progress

• Velocity conversion to [mm/s],

-(Indicator, however control is still 0-1000)

• Encoder values in [mm]

- However resets to zero before each program run

• Safety function which stops program if linear actuators are close to min (0.5mm) or max (12.2mm)

- However scale changes if values reset to zero

LabVIEW Objectives

1. Four motors with individual control

2. Move one axis (x or y axis, 2 motors) together either both in/out or both to the left, both to the right

3. Move all four motors either all in or out simultaneously

4. Motors change direction when max load or zero load is reached

5. User controls to set numbers to run a test

Objectives 1, 2, and 3 completed 3/27/12

LabVIEW Progress Cont’d• Manual Moves Code Begin :

Manual Control

LabVIEW Progress Cont’d• Test Mode Code Begin :

New Video !

Hours Worked

Gantt Chart

Future Work

• Testing Mode

• Encoder Troubleshooting & Implementation

• Need to have device complete & running in one week

• Next meeting Demo of device upstairs April 4th, 2012

Budget Update

• Expenditures from Senior Design Budget: $1112.45

• Alligator Clips $6.32

• Glue, Sandpaper $6.67

• Motors $1047

• Plexiglas $52.46

• Other costs funded by TML:

• Aluminum and Stainless Steel metals from Machine Shop – Serge estimates $20

• McMaster Carr Screws and Nuts $33.96

• Futek Beam Load Cells

• Resistors and Alligator Clips $19.92

• Parts Order #2 Resistors $26.40