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