Embedded Files
Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Finished the prototype
Further iterations on the current design to improve the functioning prototype
Accomplishments from Previous Week
Designed the lead screw mechanism for straw stopper
Designed the improved mount for the pressing motor
Further researched on the standards and social values
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Set up the new straw stopper (Lumei Xue, Ruiqi Wang)
Set up the mount for pressing motor (Yi Cui, Yuhui Shen)
Improve the team website (Guanhao Fu)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
There will be a group of students working on this project next quarter
She wanted to provide a laptop with Arduino software on it to students who will be in this project next quarter, but the computer had some issues with memory.
We expect students to have Arduino installed on their laptops because they are taking MAE 156A this quarter
Clear documentation to explain things to future students.
Share code with them, and explain things in the comprehensive report
The slide holder might deflect because of the force applied on it
3D print a bar to support it
Is it possible to replace the straw with something that has a sharp edge?
Change the presser, i.e., pushing surface, accordingly
If we want to make two smears simultaneously, the presser will tilt.
Move the presser to the middle to avoid tilt
Rotate the motor by 90 degrees
The sponsor was concerned about the time delay after a drop of blood was placed onto the slide and before the smear was made. She pointed out that this delay might affect the quality of blood smears.
The ramp was getting in the way.
Turn it by 180 degrees
Asked us if there are labs on campus where students can work with blood in. Maybe Biology labs.
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Date 2/21, in person
Parallel Flexure
The displacement in the y direction is small
Mount every component on a base plate, i.e, an acrylic plate
Already Purchased a 12’ by 12’ acrylic online
Possible ways to apply force in the middle
Suspend the motor above the slope for midpoint force acting point
Extend the shaft of the motor
To decrease friction, low friction materials can be used. For example, teflon, delrin, and delrin AF.
To hold the slides in place, use friction tape, suction cups, or clamp (case) on one end
Already purchased friction tape and hitch pin clips
To adjust the distance between the straw stopper and the ramp, one can use threaded inserts.
Already purchased a pack of threaded inserts
Comments on the report
Pretend it is the final report
In the safety section, mention how to handle blood and possible danger associated with the mechanical part and the electrical part of the device
Spring load the linear movement constraint to allow tolerance in manufacturing and assembling while optimally eliminate the rotation movement in use.
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
None
Risks and Areas of Concern
The itinerary smearing process has fixed stopping positions. We currently don’t have precise control over the absolute position of the linear actuators and recalibration is hard.
Resources or Information Required but not Available
None
Schedule
Budget (list amount spent and amount remaining)
Amount spent: 253.88
Amount remaining: 2346.12
Progress on Report and Webpage
Revised the first draft and working on the second draft of the report
Presentation slides will be uploaded and CAD files will be updated
Page updated
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