Conceptual Design Presentation ME 4182 Team: 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 – Received review of patent presentation Needed to point out critical components of patent images

Revision - Example

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

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.

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

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

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

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

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

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

Solenoid Controlled Device

Advantages: – Disengagement from the board allows for more control over erasing – Allows for marker tray to stay in place. 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 Disadvantages: Possibly expensive Difficult to create controls Moving wires for solenoids

Hinged Chain-Drive Felt Whiteboard Wiper 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

Wiper Blade Board Erasing System - 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 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

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