Team Vision for System-Level Design Phase
Engineering Requirements Mapping
Importance ( 9=Must Have ; 3=Nice to have ; 1=Preference only)
Industrial Pipette Sorter and Filler, The MSPS-200:
From this design we identified the usefulness of double railings to change the direction the pipette tips are facing.
Morphological Chart and Concept Selection
We can see that D1(cuboid pipette storage, picker to separate stacked pipettes, hanger to orient pipettes and hanger loader to align pipettes) is the best design through the pugh chart. The next best option was D3 ( cuboid storage, blockade and plate loader with a Aduino robot). The arduino robot would be expensive and also increases design complexity, but we found that the plate loader is easier to manufacture than the hanger loader. there fore the final design would be a mix of D1 and D3 with a cuboid storage, blockade to separate stacked tips and make the pipettes vertical, hanger loader to align tips with box and then manually put into box. We can see that none of the designs need to verify tip orientation as all our concepts used gravity and tip diameter. Which means that any tip not aligned perfectly will not be able to pass.
Feasibility: Prototyping, Analysis, Simulation
Goal of SectionThe analysis in this section was focused on the main concerns our team has for this project. Whether or not our project succeeds depends on the feasibility of our design addressing the 4 following concerns; Sort from any orientation, Costs, Weight, and speed.
Sort from any orientation
CostsThis is just a high level budget proposal. It is important to spend less than our budget to be able to accommodate for unforeseen costs. Some important ones being sourcing parts.
SpeedWe used two types of feasibility analysis for filling speed:
A similar industrial pipette sorter and filler is the (MSPS-200). MSPS-200 has filling speed of 100 Tips/min. The machine depends on a singular output hose, and depending on gravity based automation combined with moving rails. In our preliminary design however, we will be using multiple outlets for the pipettes allowing our machine to fill multiple tips at the same time After comparison our design and MSPS-200, we concluded that our project should be able to overcome MSPS-200 filling speed or in worst case scenario have a similar speed. Speed about 2 Tips/s.
Since our preliminary design is gravity driven and our operational vertical range of motion for the pipettes is about 1 m, a rough estimate of filling speed can be calculated.
From Kinematics Equations: H=0.5*g*t^2 where H= 1m
The time for a single tip to reach to the box from a height of 1 m would be 0.5 s. A lot of external interactions, sources of error and friction will increase that estimated time, but on the other hand our design allows multiple tips to be filled at the same time. The multiple-tip filling advantage would cancel the external effects disadvantage and that should give us a resultant estimate of 1 Tip/0.5s or 2 Tips/s, which is similar to what we got before.
Plans for next phase
The live Task tracking Document is linked here: Task Tracking