Conceptual Design Presentation

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Conceptual Design Presentation

• ME 4182
• Team 5 1 Guys Engineering
• Nathan Bessette,
• Rahul Bhatia,
• Andrew Cass,
• Zeeshan Saiyed,
• Glen Stewart
• YJ Chok

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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

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Revision - Example
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Automatic White Board Wiper

• This Week
• Conceptual design presentation
• Descriptive name
• Brief description
• Descriptive sketch
• Advantages and disadvantages

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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.

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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

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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

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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

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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

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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

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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

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Solenoid Controlled Device
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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

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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

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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

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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

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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