156B Week 9
Overview of Status of Analysis, Design, Fabrication, Tests, etc.
CAD is mostly complete, some things just need to be resized and connectors added
center stack needs some work to accomodate motor/gearbox/brake
new coupler to counterweight assembly needed
Accomplishments from Previous Week
New CAD for center assembly is in progress
Standard Operating Procedure written
Second draft of report completed
Presented to Dr. Reedy for potential Skeyeon space camera use
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Need to select new brake since old one may not be suitable (David)
Modal analysis needs to be completed to make sure vibrations do not affect other experiments in the SME building (David)
Report needs to be completed, especially drawings (Clara, Labiba)
Bill of Materials needs to be completed (Nicholas, Peter, Clara)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
5/26/20 meeting:
Erik seems to like the idea of not using the motor to brake
Matching acceleration curve, especially deceleration, is important, braking will be dramatic
Having good logos, good names, good pictures is super important for talks and funding proposals. Possible built in hint at have good CAD for tomorrow meeting with camera guy
Have someone present this project to Dr. Reedy - CAD for actual centrifuge with enclosure and simulation graph. Include enclosure with person standing beside it for scale
Mentions of finishing project during the summer, there will be testing during the summer for biology things
Erik would like to be able to move the centrifuge, he is thinking some sort of bolts into the floor in the lab, he would want a vibration analysis, its a top floor lab. Don’t want to upset optical table labs.
Checklist for installing, check with building manager, check with neighbors, how is it attached to the floor
Put fixtures into the floor and then could use bolts to attach to the fixtures, so then the bolts can be taken out if one needs to move the design
There will need to be some sort of balancing procedure, outline the rotational inertia on each side of the arm, and give procedure for how to match the counterweight for the procedure, as it is not 1:1 mass
Vibration will be for a range, so calculations will need to account for this
They might build 2, but it doesn’t seem like this affects us really
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Preliminary Design review was 5/26/20
Critique of report draft 2 (also 5/26/20)
Needs better captions on figures
Needs more consistent tone
Needs more standardized references
Operating manual should describe how machine works in more detail
Safety requirements should be more detailed
Background should include reason for choosing centrifuge
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
N/A
Resources or Information Required but not Available
N/A
Schedule
Describe upcoming milestone
Update Gantt chart.
Budget (list amount spent and amount remaining)
N/A
Progress on Report and Webpage
Second draft of report due Sunday