SAND SAMPLING APPARATUS Eglin Air Force Base Gina Teofilak Richard Klimas Dan Mortensen Ruben De Sousa

Overview 2  Introduction  Current Design  Maintenance and Safety  Design Specifications  Motion Control  Motion Control Components  Obstacles  Cost Analysis  Future Plans

Introduction INTRODUCTION 3 Fractured sand Projectile Target shot line

E GLIN V ISIT 10/31/2008 Experimental Changes Newly added forklift straddles 4

C URRENT D ESIGN Current Design  Uses 2 linear motion actuators for Y and Z motion  ¾ inch ACME threaded rod  Designed to be a lead screw  Each will have an aluminum extrusion frame  Y and Z are different sizes  ¼ inch aluminum rod stabilizers for support  motion to be attained from 2 DC motors  Z- actuator is mounted directly to the Y- actuator  Legs of Y- actuator mount to wheels to produce X motion X y z 5

Motion in the X-direction  Chain and sprocket motion  Wheels fit inside aluminum extrusion grooves  DC motor attached to sprocket  Chain is clamped to actuator  Clamp has teeth of same pitch as the chain  Chain mount is adjustable for chain tension C URRENT D ESIGN 6

Future Considerations for X Axis 7  Instead of wheels, an eight foot long steel rod is considered with linear bearings  Steel rod will make it safer for installation than wheel base  Prevents tipping when installing onto experiment  Wheels might tip  Steel rod is cheaper

Maintenance and Safety  Material are corrosive resistant  Threaded rod is hardened stainless steel  Will not corrode based on interaction with other materials used  Experiment is only ran one time a month  When not used it will be stored in indoor atmosphere  To keep sand out of moving parts:  Bearings with brush guards will used  Plastic accordion style rod boots will cover the lead screws  Plastic guards will be mounted to keep sand out of x- actuator tracks  Lubrication is not required  Bearings are shielded  ACME lead screw does not require lubrication  Safety:  Chain guard  Safety stickers  By all moving parts and electrical components 8

 Size: Length96” Width27” Height24”  Weight: Mechanism70 lbs. Vacuum20 lbs. Electronics5 lbs.  Vacuum Power: 6.5 Hp peak Volume: 20 gallons (supplied by Eglin)  Mechanism Speed: 2 in/sec Design Specifications

Motion Control  Motion control  3 DC motors/ controllers  microprocessor  encoders/ switches  Y axis motion  threaded rod  aluminum rods for support  Z axis motion  threaded rod  vacuum tube rigidly attached  Control Sequence  z axis ½”-1”  y axis 24”  x axis 4” X y z 10

11 Wall SocketPower SupplyMicroprocessor Motor Controller Encoder Switches EncoderMotor Motor Controller Motor X Direction Movement Z Direction Movement Y Direction Movement Required Torque Needed (oz*in) X movement20 Y movement40 Z movement20  Control System Schematic  DC Power supply  Microprocessor stores code  Motor Controllers  Distances components  Motors  Geared motors  Required Torque Motion Control Schematic

12 Switches Encoders Encoder Motion Control Components Why use different distance components?  Encoders  Convert rotations of shaft to code  Precise measurement of distance  Can be used to input exact position  Switches  Simple short circuit switches  Easier to program  Cheaper

13 Motion Control Obstacles  Make Screens  They are a problem  Break and Deform  Slightly unequally spaced  Removed for simplicity  Suggested from the sponsor  Projectile Entry Tube  Adds safety to the experiment  Cannot be removed  Mechanism is designed to avoid

14 Cost Analysis OptionTotal (USD) Wheels and corrosion res.chain Wheels and non- corrosion res.chain Rods and corrosion res.chain Rods and non-corrosion res.chain  Shipping  Machine Shop  Testing Facilities  Possible testing table  Current design is more expensive than using the rod  Material Cost  Donations

Future Plans  Purchase Parts  Machine and Assemble  Write the program  Test  Write Procedures  Make modifications  Conduct the Experiment  Meet the Class Deliverables December 2 – January 6 January 6 – April 24

COST REFERENCES Carbon Stick tape Aluminum Extrusion Dynatech Associates McMASTER-CARR REFERENCES 1.Cooper, William “Bill”, MSgt Wes Schuler, AFRL/RW Munitions Directorate Air Force Research Laboratory 2.Mortensen, Charles, Owner, Dynatech Associates 3.Dr. Chiang Shih, FAMU-FSU College of Engineering, Mechanical 4.Dr. Daudi Waryoba, FAMU-FSU College of Engineering, Mechanical 16

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