Week19
Final Project requirements
This weeks task was a answer a set of questions as we completed our final project. For my final as of right now, I am almost done with my 3d design, with the only thing left being the head, as well as done with printing and moving the 2 body pieces. I also have the electronics all completed, including how I will power them and have how they are going to be hidden done on the 2 base pieces.
What does it do?
My final project is a machine with an infinitely rotatable base that moves around a camera that can look in full 360 degrees. It has an internal battery, and with the exception of the windows, is fully 3d printed and painted
Who’s done what beforehand?
Pan tilt zoom cameras are pretty common projects. This is what I would call my machine if I only had 3 words, but its very different from the rest in its mechanics. Specifically, almost all the projects, this one being a good one. The difference is while those use servos, mine use steppers because. 1. I need high torque, a geared stepper can provide that, and 2. I need to be able to rotate a lot, most servos tap out at 180 or 360 degrees, although there are infinite rotation variants.
What did you design?
With the help of this model as a reference, I designed all parts of my project by myself. The ESP-32-C3 board is from a pre-fab academy board I designed, but that was also designed by myself with the help of it's datasheet.
What sources did you use?
As I described above, the main source was what I used in my 3d design, which was this model. I also used various datasheets, the big ones being the ESP datasheet and my motor drivers datasheet
What materials and components were used?
Higher detail of this can be found in my bill of materials. In general though, I am using 3d printed components, printed in petg if at home and pla if at the lab. For the project, the 4 base pieces were made of PETG, the middle base was made of a single pla, and the head was made of multiple petg pieces. For the electronics, it used a mix of fr4 copper sheets and professionally made PCBs, with electronic components all coming from digikey. The besides for resistors, the important components are a 600mah voltage regulator, a seed studio sense esp32-s3 camera, a esp32-c3-wroom-02 module, 2 drv8835 low voltage stepper motor drivers, and a teyleton robot charge-discharge module
Where did they come from?
I prioritized getting the parts from digikey, but also had some of those charge discharge modules lying around, which came from amazon. The seeed also came from seeed studio, and both types of filament were purchased from bambu directly.
How much did they cost?
The total cost for all components was around 50$, with the main brunt being 1.25kg of filament, coming in at around 25$ total. The second most expensive were the 2 stepper motors, which were 7$ each. The rest of the components cost me more since I bought in bulk, but if buying the exact requirements for this will come out to around 15$ total, including ordering the PCBs (pre-tariffs).
What parts and systems were made?
The main focus was on PCBS, which are pretty good (for someone with no formal training), but also the making of the designs, especially around how this is going to be almost entirely 3d printed. In the code, I also made a node based network to communicate between the 2 steppers and their logic, and send the camera feed back onto a phone with a custom webserver made for this project.
What processes were used?
The processess used include 3d design 3d printing priming + painting electronical design network design system integration