Overview of Status of Analysis, Design, Fabrication, Tests, etc.
A gear box has been built to test if people can turn output gears at the high gear ratio on the order of 40,000:1
Parts for the timing mechanism prototype were also laser cut.
The release mechanism has been prototyped and cadded.
Analysis of a backup electrical timer and release mechanism continues
Accomplishments from Previous Week
Completed proof of concept gearbox for timing mechanism
Conducted energy analysis of electrical alternative
Made CAD of rough design of release mechanism
Piece of acrylic obtained from Chris Cassidy for use in prototyping
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Design layout of gearbox (David, Calvin, Denis)
Determine size of hairspring and balance wheel, and gear ratio necessary for desired timing (Alan, Colin, Denis)
Order hairspring for balance wheel (Denis, Alan, Colin, David)
Continue electrical alternative analysis; determine components that would be necessary for a microprocessor + timing crystal design (Alan. Calvin)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments
The sponsor did not have many comments at our last meeting. He still thinks we should go with the mechanical design if possible
Instructor Comments from Last Meeting and Actions Taken to Address these Comments
Determine an appropriate time to switch into the electrical timing system
We have decided to switch, if necessary, at the end of week 6
Risks and Areas of Concern
Timing inaccuracies in the mechanical system due to friction, hysteresis, or manufacturing error
Creating enough power for the gearbox to overcome friction, especially if friction must be minimized through extremely precise manufacturing that could greatly increase costs
Resources or Information Required but not Available
Schedule
Prototype mechanical timing mechanism to see how accurate timing can be, by end of week 6
At end of week 6, decide if we should continue with mechanical system or switch to electrical
Budget (list amount spent and amount remaining)
Plastic Gears for gear train: $6.99
Metal rods for gear train: $7.99
Amount remaining: $4,271.03
Progress on Report and Webpage
Completed the engineering standards section of the final report.