Post Midterm Review ME 4182 Team: 5 Guys Engineering + 1 Nathan Bessette, Rahul Bhatia, Andrew Cass, Zeeshan Saiyed, Glen Stewart YJ Chok Automatic Whiteboard Wiper • Last Time – Presented project progress to classmates • Received reviews and questions concerning our project • This Time – Review comments and respond Automatic Whiteboard Wiper • How do you replace the erasers? – Simple clamp design • Thumb screws, wing nut, or simple tool removal • Remove from the side, not from the top Automatic Whiteboard Wiper • How Often do erasers need to be replaced? – Function of how much the board is used • Possibly as often as standard erasers now Automatic Whiteboard Wiper • Should the ease of replacing the eraser be a criteria for design? – Ease of replacing eraser was taken into consideration • Rolled into “complexity” criteria Automatic Whiteboard Wiper • Would a cleaning fluid system be implemented? – Group consideration was given to the addition of a cleaning fluid • Decided it would best be suited as an add-on and not a feature Automatic Whiteboard Wiper • What type of motors would be used – Force/ torque tests will be conducted to determine the size requirements of the motor Automatic Whiteboard Wiper • How would you control the whiteboard wiper? What language would you use to code it? – Simple microcontroller – Possibly HC11/ HC12 microcontroller – Coding language is dependent on microcontroller Automatic Whiteboard Wiper • Why is this design better than the others? – Less complex – Low profile – Quadrant based – Thin eraser Automatic Whiteboard Wiper • Can the whiteboard wiper be retrofitted to chalkboards? – This design was intended for whiteboards • Testing was done specifically for whiteboards • Could potentially be adjusted for chalkboards, but we are not designing for that Automatic Whiteboard Wiper • Who is the target audience? – Anyone who wants to save time and effort erasing a whiteboard Automatic Whiteboard Wiper • How noisy is the system? – It will be designed to be as quiet as possible! • Function of the size and type of the motor • Desire minimum sound from the motor Automatic Whiteboard Wiper • What about a half based system instead of quadrant based system? – Quadrant based system is still effective • Greater content control with quadrant based system Automatic Whiteboard Wiper • How fast will the system wipe the board? – Design for as fast or faster than hand wiping Automatic Whiteboard Wiper • How would the system be assembled to the board? – Equipment would be framed around existing board • Eraser is on the system that attaches around the board, not onto • System would require the removal of the marker tray, but this is the only intrusion Automatic Whiteboard Wiper • Have you considered any additional cleaning techniques? – Addition of a vibratory motion to the eraser may increase effectiveness of the system • Microcontroller could be coded to “vibrate” eraser as it erases Automatic Whiteboard Wiper • How would you control the force applied normal to the board? – Screw type system to lift or lower system onto board Automatic Whiteboard Wiper • Impact of midterm presentation – Class basically understood whiteboard wiper concept – Questions mainly dealt with clarification of existing ideas Automatic Whiteboard Wiper • Next Time – Layout Drawings • Layout or assembly drawings • Drawings show how the individual parts or subsystems combine as a whole • Encouraged to use IDEAS, AutoCAD, ProEngineering, and/ or SolidEdge