Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Final steps of first Attenuating Screen construction well underway
Motor incorporation ongoing
Accomplishments from Previous Week
Plotter attached to Lift following Instructor recommendations
Purchased larger size steel bearings and plastic fillers for the Screen
Created coupler to connect motor to Lift-Plotter assembly
Completed weight test for 3-D printed Screen handle
Acquired acrylic sheet for future constructions
Visited Thornton Hospital (11MAY2017) to compare Screen cutouts with actual camera head and collimator; took notes and made slight changes accordingly
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Finalize automated lifting using purchased motor
Complete first Screen and pour in gel-bearing mixture
Complete construction of third and final iteration of 2D Phantom
Initiate efforts to identify viable sliding mechanism for motor support
Conclude construction of second Attenuating Screen
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
09MAY2017 (Google Hangouts Meeting):
Team updated Sponsor on completed and ongoing tasks: Screen handle printed; Screen cut out and being put together; purchased motor to be received shortly; Larger size bearings and pellets ordered
Team informed Sponsor of the need to visit the camera once more - whether at Thornton or Hillcrest - to take some more measurements
Pointed out his desire for the Team's efforts be geared toward providing components that are reusable; this would allow for the overall project to be assessed on a trial-and-error basis and also allow future Bioengineering recruits to continue making use of the deliverables
Reiterated that the plotter-lift assembly, once completed, could benefit from being attached to a cart for ease of transportation
Stated that, for Team's final presentation, it might prove helpful if the XYZ Plotter and the Screen could be taken to a hospital and actually used for imaging. This could be done in front of the camera and the collimator or the Screen to acquire potentially useful data. No image reconstruction efforts would be needed and the data acquired could be used by the Team demonstrate that the deliverables performed as expected
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
09MAY2017 (In-Person Meeting in EBU2 333):
Provided feedback on first draft of Team Webpage. Per Instructor's observations, the videos on the front page have been edited to remove pesky restrictions and changes to the Final Design page are being brainstormed
Warned that implementation of Motor Sliders will be complex and critical and should be prioritized over Screen Case and Handles. Team took note, started assessing viable sliders but awaits Motor integration to fully take the next step
Team updated Instructor on ongoing efforts to mount the XY Plotter to the Lift and on the situation of the Motor (it has been ordered and shipped, awaiting receipt). Also, recommended ballistic gel had been received
Team explained instructor's wish to have a mix of steel bearings and plastic fillers for volume spacing and ratio determination
Team showed Instructor experimental setup in place to ensure that the handles could support a weight of at least 20 pounds for a period of 24 hours; when pressed for clarification on the handles, Team explained in depth how the handle design would fit in with the camera head
As for the watertightness 2D Phantom, Instructor advised against using O-ring and suggested Loctite threadlockers which can be broken with enough torque. Another recommendation was silicone washers
Provided feedback on first draft of Team Final Report
Team asked Instructor about the difficulty of obtaining data to be included in the Final Report; Instructor recommended that the hysteresis analysis performed for the Lift definitely be mentioned. Other possible areas for data collection could be the XY Plotter motion time, imaging or data collection with the 2D Phantom, and an evaluation of the randomness of different Screens
11MAY2017 (Impromptu Interaction in EBU2 333):
Provided invaluable advice on possible location of the motor power supply: indicated that this component could be attached directly onto the lower piece of Lift
Entertained questions about the difficulties associated with implementing the motor
Made recommendations on items to consider adding in the final component such as an ON/OFF switch
Risks and Areas of Concern
Lingering complications fully integrating the motor
Schedule
Describe upcoming milestone
Update Gantt chart.
Budget (list amount spent and amount remaining)
MakeBlock XY Plotter Robot Kit - $279.88 (Amount remaining: $3720.12)
MakeBlock Me Orion - $29.99 (Amount remaining: $3690.13)
Southworth Lift Tool + Expedited Shipping - $869.44 (Amount remaining: $2820.69)
Nylon Screws - $8.26 (Amount remaining: $2812.43)
Ballistic Gel - $321.43 (Amount remaining: $2491.00)
2-mm Steel Ball Bearings - $87.47 (Amount remaining: $2403.53)
Integrated Stepper Motor/Driver - $280.54 (Amount remaining: $2122.99)
Polycarbonate Pellets - $93.64 (Amount remaining: $2029.35)
4-mm Steel Ball Bearing - $138.45 (Amount remaining: $1890.90)
Progress on Report and Webpage
Constant updates being made to Webpages (weekly progress reports, week 2/3/4 write-ups, first draft of final report). These are being made according to the feedback received from Instructor