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The Idea

Our design is based off a standard x-y coordinate and movement system, similar to a printer head. We decided on this method because our system will have to implement multiple features from the "printer head" position. Not only do we have to write and erase, but we also have a camera mounted that can take pictures of the board. 

A few of our more recent decision has involved choosing wooden rods and metal bearings with a thickness of 20mm. This was decided because it was a convenient size at our local hardware shop and relatively think enough that we didn't think the materials would snap. 

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Problems

• Part Delays: Throughout the course of the project our team experienced several different delays involving parts either created or ordered for our project. We had one incident with our first order of parts that kept it from arriving for a week due to approval delays. We also encountered delays with 3D printing due to queue times and needing to re-print pieces due to errors in measurements or the print itself.
• Coronavirus: The worst problem we experienced during this project was the impact of the Coronavirus. Due to the Coronavirus closing the university, we were unable to access our materials or resources and were forbidden to meet in a person as a team. This left us “dead in the water” and unable to finish the project.
• Change of Plans: Midway through our design of the frame for the device, our team was told that the whiteboard we were expecting to use was no longer available. The one we were initially expecting to use was an 8 foot wide by 4 foot tall, wall-mounted whiteboard and we were told that we would now have to use a 4 foot wide by 5 foot tall, mobile whiteboard. This change meant that he had to rethink a lot of the aspects of the frame’s design in order for our device to work with the new whiteboard.

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Tools and Software

In order to meet our design goals, we are using the following tools and programs.

Tools	Software
Raspberry Pi 3 B+	AutoCAD
Stepper Motor Hat (2 Motors)	Python
Stepper Motors	LAMP Stack (Linux, Apache, MySQL, PHP)
Actuators	HTML, JavaScript, CSS
Pulley cable
3D Printed structures
Wooden Rods
Metal bearings
Raspberry Pi Camera

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Project Trade Offs

While we did our initial prototyping, we found that we needed to swap out:

• Replace copper pipes with wooden rods
• Increase size of the vertical horizontal bracket
• Abandoned battery solution with a direct wall plug

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Testing

Our functioning components:

• Near completion of the horizontal frame structure
• Stepper motors working with pulley
• Raspberry Pi was setup and controlled motors
• Raspberry Pi ran website mock-up
• Image Stitching software was functioning

We were able to test all of the above, however, we were not able to test it as a single system as the frame design was never fully completed, which did not allow for our other components to be properly mounted.

To test the horizontal bracket we were able to put it on the standing whiteboard and then place the wooden rods and the bearing sliders along with an early prototype of the vertical bar mount.

To test the stepper motors and the Raspberry Pi controls to it, we connected the two items then ran simple software to ensure the motors were running and the pulley chosen ran smoothly.

The Raspberry Pi was able to run a simple website. This was tested by loading up the website, however, no functionality to the motors was tested as they system was not connected.

The Image Stictching program was tested with some stock photos as well as single block colors, but never tested with images from the whiteboard.

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Final Prototype

Due to scheduling and COVID-19, we were unable to successfully put together a fully complete prototype of all the systems working together. While we had multiple systems working, the base system that the rest of the components relied on, was not complete.