156B Week 3

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

• • Prototype design has been agreed upon: Cylindrical design with a smaller PVC tank below the electrical components, seperated by a plank and beam supports.

  • Initial tests of plastic and steel mister heads revealed the following:

• 1. Seaflow and Shurflow pump can run off of 12 V or 8 V, but 12 V is preferred 

  2. New tubing or a better method of securing the tubing is needed to and from the pump and accumulator

  3. Mister nozzles need to be cleaned with cleaning vinegar for best misting results

  4. Steel nozzle produced a mist that has a larger reach than that produced by the plastic nozzle while fan is off.

Accomplishments from Previous Week

• • New mister head has been ordered and should arrive by Monday 4-17-17 (in transit to CA as of 4:00 pm 4-16-17)

  • Cylindrical container for test design has been purchased (Home Depot)

  • Smaller Seaflow pump has been tested to run off of a single battery of the golf cart

  • Sponsor has approved the test design

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

• • Inquire about obtaining a water pressure regulator in order to measure water flow pressure (Erasmo & Oscar)

  • Research the dimensions of the golf cart uprights for most popular carts: Ez-Go, Club Car (Erasmo & Oscar) 

  • Meet with Ian/Tom and work out design for mounting unit on carts (Erasmo & Oscar)

  • Research and  find affordable capacitors for the electrical system (Erasmo and Oscar)

  • Begin CADing new fan design (Chota & Christobal)

  • Begin assembling the cylindrical unit from purchased parts (Chota & Christobal)

  • Research universal mounts for current and new mister heads that will prevent or greatly reduce leaking (Chota and Christobal) 

  • Obtain new tubing and fits in order to retest new mister and old misters without any leaking (Entire Team)

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

• • While the Cylindrical casing the team has is fine, the final product should be sturdy enough for customers to place their feet on (4-15-17 meeting)

    • The final design will be meant to be rotomolded, and the test design is intended as a proof of concept. The plastic using in the molding process should be stronger than the test design's material.

  • If the fan is adjustable about a point, there is no need for a sliding bracket at the base where the fans connect to the mount(4-15-17)

    • The team is considering drilling the fan neck into the mount to allow tubes and wiring to go through to other components

  • Fan "clam shell" casing could be modified so the toggle switches are placed through holes on either side of the fan for easy access. This will reduce the production cost of the casing by eliminating the black molded switches above the "shell." (4-15-17)

  • Assembly costs are one of the most influential factors in our sponsor's production, especially the "clam shell" since it is relatively inexpensive to create by expensive to assemble (4-15-17)

    • "clam shell" is still to be redesigned for easier assembly, and slots for the toggle switches can be included

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

• • Cart roof supports are not meant to hold additional loads (4-10-17 after presentation)

    • The mounting system is still being designed, and the team knows that counter moments should be accounted for. Additionally, the design is meant to be small enough for the driver to see past it and lighter than the current self-contained unit in use. Further research on the beams used on various carts is still needed.

  • The fans are the most noticeable electrical component for the customer, and as such a more cost efficient method to implement is to filter the voltage spikes leading into the fans instead of the entire system. (4-10-17)

    •  Professor Silberman has provided us with an actuator model that we can look up for use.

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

• • The mount system should not depend on friction, due to vibrations of cart

Risks and Areas of Concern

• • The loose connection to the current metallic mister is causing the mister head to leak and corrode the mister heads

  • Still need to design fan housing, gooseneck system as well as mounting, and extending feature

Resources or Information Required but not Available

Schedule

• • The next big design decision is designing the fan housing and fan gooseneck system.

Budget (list amount spent and amount remaining)

• • Spent - $55

  • Remaining - $1,745

Progress on Report and Webpage

• • Finished the required completed sections of the report (background, title page, appendix, etc.)