156B Week 7

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • Pursuing custom-made V-belts for Prototype 2 of Friction Drive

  • Gained a more complete understanding of necessary steps for building Motor Circuitry

  • Created draft of Programming Logic and Flow Diagram

  • Updated budget to reflect Sponsors' commitment to $6500 instead of $7500

    • Machine shop expenses: $1800

    • Parts: $4700

Accomplishments from this Past Week

• • Found that "pulley with grooves" idea as well as "crowned pulleys" will not work for Prototype 2 of Friction Drive

  • Gained knowledge of exact Motor functions to use and how to trigger them

    • Started circuitry necessary for Motor Control without PC 

  • Created outline for necessary programming

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • Complete Friction Drive Prototype 2 A.S.A.P.

    • Call for custom-made 

  • Integrate motor with Friction Drive and test for necessary Motor Torque

  • Find a sensor or alternative mechanism for "zero"-ing of Motor Steps

  • Buy and integrate a DC motor for the Wire Storage

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

Note: Most Recent Sponsor Meeting = Same Meeting Covered in Last Week's Progress Report

Sponsor Comments, From Week 6 In-person Meeting with Laura, 12:30 P.M. Monday, 05/08

• Desire for time estimate of 2nd prototype for friction drive

Team Actions

• Nearing completion of Prototype 2

  • Planning to meet with Sponsors and show new prototype, Friday, 05/19 

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

Instructor Comments, In-Person Week 6 Meeting, Thursday, 05/11/17

• • Consider hysteresis

  • Find out from Prototype 2 what friction must be overcome 

Team Actions

• • Comments taken into consideration for design of Prototype 2

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• • N/A

Risks and Areas of Concern

• • Extent to which we can identify and integrate new components (LCD display, sensor, etc.) into design by Week 8 Thursday, 05/25

General Risks

• • Time Risks (e.g. manufacturing of device and receiving shipment of parts on time)

  • Design Risks (e.g  design is prone to high failure rate)

  • Production Risks (e.g. prototype is impossible to manufacture)

  • Hardware Failure Risks (e.g. purchased components are incompatible with design or prone to high failure rate) 

  • Project Failure Risks (e.g. design is unable to work or be manufactured within the time-frame limit)

Resources or Information Required but not Available

• • Testing data from Friction Drive component

    • Requires a working prototype of the Friction Drive

    • Necessary for measurement test and determining necessary torque values

Schedule

• Complete Prototype 2 of Friction Drive, A.S.A. P.

• Primary Design Review Presentation on Thursday, 3:30 P.M. 05/25/17

• Final Report, Draft 2 on Friday, 11:59 P.M., 05/26/17

Budget (list amount spent and amount remaining)

• • Total: $ 4700

  • Used so far: 

    • $489.99,  Motor Package from Oriental Motor

    • $46.29, Aluminum Cylinders from Online Metals

    • $13.99, Skateboard Bearings from Amazon Prime

    • $13.99, Skateboard Bearings from Amazon Prime

    • $7.69, 12V, 1A Power Supply

    • $11.95 12V, 6A Power Supply

    • $5.98 Power Entry Module

    • SUM = $589.88

  • Remaining: $ 4110.12

Progress on Report and Webpage

• • Wrote Requirements & Deliverables Section of Final Report