Transcript document

Prototype Presentatiton
ME 4182
Team: 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
Problems with some of the controllers considered
• Inadequate current output
• Complicated interface
• Outputs only allow for one motor
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
• Pinion
– 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)
– 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 + nut
Other mounting hardware/screws/bolts
80/20 Inc.
Order
Update
• 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
Automatic Whiteboard Wiper
• Next Time
– Prototype Review