Customer Handoff & Final Project Documentation
Table of Contents
Team Vision for Final Demo and Handoff*What did your team plan to do during this phase?
- Finalizing the assembly process by fixing all stations in their end state.
- Test the Micro-pipette tip box filler multiple times as a whole.
- Come up with an designed experiment to measure success/fail rates per trial.
- Identify the sources of failure.
- Breaking the test process into simpler steps by decreasing the design input.
- Troubleshoot the defects in the design and come up with design updates to increase the success rate.
- Test the updated design and monitor design improvement.
- Provide abstract of sources or error in current design and ways to troubleshoot it.
- Suggest an idea for new design that overthrows current defects.
- Upload all documents to edge.
*What did the team not accomplish during this phase?
- Increase the success rate remarkably.
- Collaboration on final redesign of parts.
Test Results SummaryTest Results
After our last design phase we made improvements onto the system level design. This state is what was used for the first block of testing seen in the results. The after deflectors block represents the the testing done after the addition of deflectors to the end of the sorter to provide a physical barrier between the lanes. This addition improved the ability of the device to sort pipette tips correctly, but still fell short of the 96% effectiveness goal (1/25 error) set by our costumer.
Risk and Problem TrackingProblem Tracking
Many of our solutions in the problem tracking do not fully solve the problem they are associated with. The solutions were our attempt to fix what was in our power to fix with what time was available to us.
Final Project DocumentationTechnical Paper Bill of Materials
*Proposed Adjustments to Current Design for Next Pipetteers
- Having our system input be 1000 tips initiated a lot of error sources like jamming, piling, uncontrolled motion, and disorientation.
- In order to avoid these problems the team suggests adding a new station before the storage to control the flow and allow only for 10 tips to fall at a time.
- The new station will also be responsible for positioning the initial fall status for the tips to maximize success rate. Note: tips falling from middle have higher success rate.
*Proposed New Design for Next Pipetteers
- There are three major sources of error that were recognizable in our design that are irreversible.
1. The metal rails were not able to provide smoother motion for the tips and thus the required end state for the tips became unreachable.
2. The storage having multiple ramps being closed system technically increased the chances of jamming and it is very hard to clean, maintain, or make adjustments.
3. The lack of driving force except for gravity made the design out of control and increased the chances of failure while testing.
Therefore the following design was proposed by the team to overcome these problems:
- The design consists of an opened funnel to allow for cleaning and maintenance. Inside the funnel comes the variable motor speed that we use in our system connected to it a shaker cam piece to allow tips to scatter.
- The second station will be a single lane pipe that allow for one tip to flow at a time. Connected to the pipe inlet a flow controlling solenoid that allows tip to flow only in the right orientation, (nose-down).
- The tip box will be setting at a movable Arduino board that will allow the box to move from tip hole to next hole.
Advantages in New Design
- Having a single controlled lane will cancel most of the jamming and piling. Also by controlling the inlet with a solenoid will make sure that tips are in the right track. The movable arduino board makes the system more autonomous and minimize human work. Adding to that, the whole design is opened and for cleaning and maintenance.
Plans for Wrap-up
- Finalize Gate Review Schedule
- Hand-off materials to Dr. Bailey