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Conceptual Design Presentation

Conceptual Design Presentation. ME 4182 Team: 5 + 1 Guys Engineering Nathan Bessette, Rahul Bhatia, Andrew Cass, Zeeshan Saiyed, Glen Stewart YJ Chok. Automatic White Board Wiper. Last Time Presented Revisions to previous deliverables Patent research for related systems

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Conceptual Design Presentation

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  1. Conceptual Design Presentation ME 4182 Team: 5 + 1 Guys Engineering Nathan Bessette, Rahul Bhatia, Andrew Cass, Zeeshan Saiyed, Glen Stewart YJ Chok

  2. Automatic White Board Wiper • Last Time • Presented • Revisions to previous deliverables • Patent research for related systems • Received review of patent presentation • Needed to point out critical components of patent images

  3. Revision - Example

  4. Automatic White Board Wiper • This Week • Conceptual design presentation • Descriptive name • Brief description • Descriptive sketch • Advantages and disadvantages

  5. Buffer Automatic Dry Erase Board • Utilizes lead screw to drive a circular buffer vertically. • Worm gear attached to buffer and driven by lead screw provides rotational cleaning. • Horizontal movement by rack and pinion with moving gear and motor with stationary chain.

  6. Buffer Automatic Dry Erase Board • Advantages: • Horizontal, vertical, and rotational cleaning action. • Allows for marker tray to stay in place. • Disadvantages: • 2 motors • Expensive • Intrusive • No movement away from board • Points of Interest: • One motor provides rotational and vertical cleaning • Rack and pinion horizontal drive

  7. Simple Linear Felt Wiper • Vertical slide wiper system • Wheels and tracks to hang and propel • Motor on the wiper • Side ramps to ease eraser on and off board • Stop “buttons” to return wiper to start position

  8. Simple Linear Felt Wiper • Pros • Simple design using inexpensive springs to apply pressure • Single motor for horizontal movement • Replaceable felt wiper • Simple stops reduce reliance on controller • Cons • No automated movement away from board • Power cable management required • Side ramp required to ensure wiper slides on and off white board

  9. Simple Linear Felt Wiper • Points of interest • Cap at top can be removed to replace felt wiper • Wiper face held back using simple metal clasp • Wiper slides up to remove • Three wheel system drives wiper horizontally • Grip material on larger wheels for no slip

  10. Automatic Whiteboard Eraser • Uses two separate motors • A wheel is attached to one motor to drive the assembly on the track • The other motor is used to rotate the eraser

  11. Automatic Whiteboard Eraser • Advantages: • The rotating eraser ensures more surface area to clean the board • Relatively easy arrangement • Disadvantages: • 2 motors • Expensive • No movement away from board • Points of Interest: • One motor provides rotational cleaning • The surface of the track and the drive wheel should have enough friction to overcome any slip conditions

  12. Solenoid Controlled Device

  13. Solenoid Controlled Device • Features: • Uses solenoids to draw erasers to board • Screws on backs of erasers allow for fine adjustment of distance from board • Uses U-Grooved wheels on rail driven by a string pulley system • Advantages: • Disengagement from the board allows for more control over erasing • Allows for marker tray to stay in place. • Disadvantages: • Possibly expensive • Difficult to create controls • Moving wires for solenoids

  14. This particular design concept utilizes a felt wiper mounted on a circular shaft fixed to the end plates for the eraser mechanism along with a double spring hinge at top and bottom for the mount. The AC-powered controller will drive a window motor propelling a chain around pulleys, similar to a bicycle, with hooks attached and will return to position to the left of the board real estate. • (+) • Simple • Cheap • Conserves Board Real Estate • Easy eraser replacement • (-) • Requires maintenance • Power not as convenient • Motor may be noisy • Spring hinge wear • Specialized pulleys • (!) • Implementation allows for marker tray • Rigid mounting reduces pressure requirement Hinged Chain-Drive Felt Whiteboard Wiper

  15. Driven horizontally along parallel, wall mounted rails using electric motor driven wheels • Felt lined wiper blade like structures sweep across the board erasing marking in a horizontal motion • Wiper blades can be lifted off the surface of the whiteboard using hinges and actuators Wiper Blade Board Erasing System

  16. Wiper Blade Board Erasing System • Advantages: • Slim, low profile design • Allows board to be selectively cleared • Disadvantages: • -2 motors, 2 actuators, 8 wheels • (many parts) • May be hard to fit in budget • Points of Interest: • Wheels provide drive and clamping force along rails • Blades can be easily fitted with new cleaning media

  17. Automatic White Board Wiper • Next Week • Mid-Term Presentations • Present progress so far • Simple mockup or prop needed for demonstration of the best conceptual design

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