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AUTOMATIC BALL THROWER
ET 494Instructor: Dr. KoutsougerasBy Scott DauzatAdvised by Dr. Ma
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PURPOSE
Design and build a safe, portable ball launcher
Easy use for dog and operator Lightweight Inexpensive Launch a tennis ball automatically or
manually
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METHODOLOGY
Motor - A 12 volt DC motor will be used create power for the launching arm.
Gear Box –A gearbox will be attached to the motor shaft to increase the torque and lower the rpm’s.
Lever – Mechanism attached to the output shaft of motor which will strike the ball.
Circuit – Consists of micro switches to engage and disengage power to the system. Relay to take the load. Switch for auto and manual. Wireless remote system.
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DESIGN ADVANTAGES
• Portable and Lightweight • No Electricity Required • One person operation • Fun for your pets
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DESIGN OBSTACLES
• Safety • Reliability • Minimizing Cost • Keeping weight to a minimum
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MOTOR/GEARBOX
2004 Chevrolet Silverado power window motor
Small, Lightweight, High Torque
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LEVER ASSEMBLY
Attached to the output shaft of the gearbox.
Spring attached to lever arm and system
Both turn at the same time Center of rotation Spring creates high velocity Lever strikes ball
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LEVER ASSEMBLY
Spring Attachment
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DOUBLE POLE SWITCH
The double pole switch used for the circuit diverts the current in the circuit which allows for automatic or manual operation.
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MICRO SWITCH
The micro switch that activates the system will be wired in the normally open position.
The second micro switch that shuts the motor off will be wired in the normally closed position.
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WIRELESS REMOTE
Allows the operator to press the button on the remote to activate the system.
The system will not activate unless there is a ball placed in the device.
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COMPLETE CIRCUIT
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BATTERY AND CHARGER
12 Volt 5 Amp
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BUDGET
Motor - $33.46 Micro Switches - $6.00 Battery - $24.95 Wireless Remote Switch - $8.99 Lever - $3.96 Bolts - $5.87
Total - $83.23
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TIMELINE/DELIVERABLES
September 3, 2013: Came up with Electronic Ball Thrower idea. September 10, 2013: Discussed the design of the thrower September 17, 2013: Discussed the components to be used October 3, 2013: Ordered discussed parts to be used October 4, 2013: Prepared preliminary proposal October 12, 2013: Constructed rough circuitry October 18, 2013: Designed and built lever assembly October 22, 2013: Proposal and presentation prepared October 25, 2013: Deliver presentation and proposal November 29, 2013: Have completed assembly built and tested December 6, 2013: Have final report and presentation complete
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QUESTIONS
?