Overview of Status of Analysis, Design, Fabrication, Tests, etc.
We have chosen a lead screw for the vertical movement and we have purchased all of the parts for the vertical lift system. Our second brake that was supposed to come in a week ago has been delayed to July.
Accomplishments from Previous Week
Chose the lead screw design instead of the rack and pinion and purchased the parts for this system.
Chose and purchased the stepper motor and motor driver for the vertical lift
Modeled entire system on Solidworks (including parts that need to be fabricated)
Looking at options for operating table clamp
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Fabrication of vertical lift system (Alan, Frank, Janak)
Finalize operating table clamp and fabricate (Alan, Frank, Janak)
Find alternative to elbow brake and fabricate arm (Dan, Young)
Design laryngoscope holder and work on fabrication (Dan, Young)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
20lb system is okay for weight requirements (5/14 - in person)
Handles on sides to help mount the system
Access to future medicine building will be granted this week
Drape used is approximately 3ft X 3ft
Friction braking is a possibility, but if possible sponsor wants to stick with EM brakes
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Functional requirement should be "to prevent inadvertent movement" not "safety lock to prevent inadvertent movement" (5/10 Proof of Concept Pres.)
One brake could possibly lock both joints - timing belt
For the rack and pinion system, building a gearbox requires high precision since forces between gears can spread shafts apart
Reference source of equations for analysis
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
Consider another name for "kill switch" (5/10 Proof of Concept Pres.)
Make presentation shorter/more concise
Red labels on black background are hard to see
More gears add more parts that may possibly jam or fail (higher risks)
Counterweight to help with weight distribution/moment
Measurement tic-marks on the side of the assembly to show the height of the equipment (for final external casing)
Not important where the purchased parts are from (presentation)
Risks and Areas of Concern
Elbow brake is no longer going to make it on time. Look into either a friction lock, buying a new brake, or a belt drive from the shoulder joint
Resources or Information Required but not Available
N/A
Schedule
Describe upcoming milestone
Update Gantt chart.
Budget (list amount spent and amount remaining)
Spent $1000
$500 Remaining
Progress on Report and Webpage
Updated webpage with design renderings from Solidworks