We went into week 4 with a couple goals in mind, primarily focused on machining and testing the ABS enclosures we ordered as well as dipping our toe into the UI/UX design of the touchscreen.
For the enclosure, we did initial machining tests with a manual mill to get a better understanding of cut dimensions and tolerances. As shown in the below images, we first worked towards developing a CAD model for what we want the enclosure to look like in terms of all the necessary cuts that need to be made for the electronic components. These were then used as reference during manual milling. During machining, the design team cut holes for the wires and buttons, and slots for the USB hub and touchscreen. We were unable to make cuts for the vents due to the small tool size necessary, however the plan is to possibly purchase a smaller tool to then use in the lab.
From a manufacturing standpoint, in terms of producing 30 units by the end of the quarter, the design team also started looking into outsourcing our machining, and getting a quote for 30-50 units of machined enclosures from our primary supplier, Polycase. This would involve finalizing our CAD models and also ensuring that our supplier is able to do the machining to the level of detail that we are striving for.
From a GUI (Graphical User Interface) perspective, we got the go from the EE team on being able to use the touchscreen for this iteration of the system. Thus, this week we spent time brainstorming required and desired functionalities of the touchscreen. In addition, the team also got an initial understanding of the graphical capabilities of the touchscreen and how to begin exploration into the online libraries that can help with this.
Printed Circuit Board (PCB) Sourcing Update