Prototype Presentatiton
ME 4182Team: 5 Guys Engineering + 1
Nathan Bessette, Rahul Bhatia, Andrew Cass,
Zeeshan Saiyed, Glen Stewart
YJ Chok
Automatic Whiteboard Wiper
• Last Time– Prototype Presentation I• Chose metal parts, presented pulleys, and control
board options
• This Time– Prototype Presentation II• Metal received, pulleys and cables, backing material,
and control board selection
Motor Function
• Motors Function Properly!– (Demonstration)
Motor Controller Problems
• Inadequate current output
• Complicated interface
• Outputs only allow for one motor
Problems with some of the controllers considered
Sizing the power supply Communicating with the microcontroller
Motor Controller Selection
1064 – PhidgetMotorControl HC
Minimum Power Supply Voltage
6V
Maximum Power Supply Voltage
15V
Continuous Motor Current
14A
• Bill of Materials for Phidgets Motor Controler, submitted to Antonette on Nov. 3
• Request to Order from RobotShop distributer
• New Price to reflect US Dollar: $93.25
Track & Wheel Research• Alternatives to the $45.00 8020 Inc. wheel and bracket combo were researched.• Option 1: Drawer slide C-bracket combined with fitted steel castor wheel • Option 2: Creation of custom wheel and bracket combination to fit 8020 Inc.
1010 aluminum profile cutout. • Option 3: Stay with current selection.
Track & Wheel Research
Pulley & Cable Research• Plastic pulleys of an acceptable diameter were found at The Home Depot.• The removal of pulley from the bracket
is possible in order to stack pulleys as needed.• A mount and axel assembly can be created in order to adapt the pulleys for
the prototype.• A plastic sleeved steel cable with an acceptable cross-sectional diameter was found to fit the pulley, basic friction tests were performed to ensure that the cable can grip the pulley.
Rack and Pinion• Rack
– Molded Nylon Rack• McMaster-Carr Part
#57655K63– Pressure Angle - 14 ½°– 24 Pitch– Face Width - ¼”– Overall Height - ¼”– Price: $5.33 per foot– Total price: $15.99 (3 ft)
• Pinion– Molded Nylon Pinion
• McMaster-Carr Part #57655K53
– Pressure Angle - 14 ½°– 24 Pitch– Number of Teeth - 24– Pitch Diameter - 1.00”
(A)– Hub Diameter - ⅝” (B)– Outer Diameter - 1.08”
(C)– Overall Length - ⅝” (D)– Face Width - ¼”– Bore Size - ¼”– Price: $2.67
Whiteboard Mounting System
Bill of Materials:(1)66’’x72’’x0.5’’ sheet of plywood(2)2’’x4’’x66’’ pine (or other suitable) wood(1) 2’’x4’’x48’’ pine (or other suitable) wood(4)Mounting bolt + nutOther mounting hardware/screws/bolts
• Material ordered from Carolina Fluid Components by Antonette on Oct. 29
• Did not order wheel assembly due to cost; researched alternatives
•Status report from Antonette on Nov. 3 stated material expected to be received on Nov. 4
80/20 Inc. Order
Update
Automatic Whiteboard Wiper
• Next Time– Prototype Review