156B Week 3
Overview of Status of Analysis, Design, Fabrication, Tests, etc.
New Design Finalized for slide movement
Trying to perfect rod smear before moving on to another method of smearing
Parts are being sourced and slowly coming in
Accomplishments from Previous Week
Stained and imaged pig blood smears to check quality
compared rod smears, flexible PerfectSmear, and the Sysmex smears
noted that none of the three methods created a smear comparable to smears with human blood
Compared Yoke Mechanism vs Linear Guide Rail - Cindy and Kevin
tried to incorporate slide unloading into the device
Created a design that incorporated aspects of both mechanisms
Electronics interface updates
power and current analysis- Marco
Sourced linear guide rail and other motors/parts
Took another look at the smear stainer where the slides will unload into
have simple dimensions to create a CAD with
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Complete CAD for linear guide design + unloading mechanism (Cindy)
Need to buy material to build this (sheet metal, hinges, guide rails)
update sponsor with new design and get it approved
Smearing - Kevin
Cut and polish rods to correct size to try and perfect smears
Create a design for rod or blade dispensing mechanism once a method is selected
buy parts for actuation
Electronics - Marco
power/current calculations and buying resistors/needed electronics
help with CAD for the smearing portion of the device
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Delivered rod and PerfectSmear pig blood smears in person- 4/12/19
Dr. Broome expressed interest in having the smear unload into the HemaTek 3000 stainer
Dr. Broome stained and imaged these smears for us
conclusion: smears are not of good/high quality
both the rod and PerfectSmear had issues
Possible issue with the pig blood itself
Need to smear and image using fresh blood and the Sysmex
Met on 4/15/19
Smeared fresh pig blood on Sysmex
these results showed poor quality blood samples as well
Issues with the blood itself
Need to incorporate unloading into stainer
Possibly move on to human blood if pig blood continues to be too different
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
4/11/19 - in-class design review presentation
FDA regulations should not be a priority right now
keep in mind - good lab practices
4/15/19 - in person meeting
Described how to combine yoke and linear guide designs
Helped clarify feasible end goals
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
4/11/19 - in-class design review presentation
questions of mechanism that holds rod in place
team clarified the design for rod smears
Risks and Areas of Concern
Concrete way of deciding a smear is "good enough"
pig blood smears weren't even "good enough" with the Sysmex
Resources or Information Required but not Available
NA
Schedule
Combining all Cads- end of next week
Budget (list amount spent and amount remaining)
Starting Budget $2600
Total Spent $848.28
Remaining Budget $1751.72
Progress on Report and Webpage
all good