D-drone Copter Hack 2021 by AT Makers

CopterHack-2021, team AT Makers.

Intro

People strive to teach artificial intelligence everything they can do themselves. We are taught to draw from childhood. And why not teach the drone to draw? At the moment, copters and graffiti are gaining popularity. So we decided to combine them.

Models and assembly

To complete the project you need to have in stock:

spray paint
clover 4 kit
servo MG90S
3D printer
spray can extension straw
velcro
4 long screws and nuts M4 or M3
2-4 short self-tapping screws M4 or M3.

Download and 3D-print details:

holder
screw
rack_holder_with_nut
rack x2
servo_holder.

Spray holder. The spray holder is attached to the deck with 4 screws and nuts. To fasten the can to the holder, we used a tape with velcro. With 4 nuts and screws, we fix the drone's upper deck with spray holder.

Holder weight: 90g.

If the diameter of the can is less than the diameter of the holder, we use the part in the form of an arc, with the size of the difference between them. This helps us to fix the spray can firmly.

Pressing mechanism. To push the valve, we will use a screw drive with a fixed nut. A bar with holes will be attached to the servo, which will include the racks attached to the nut. This helps the servo to move only on one axis, up and down. We also modeled the cap for the spray can button, since the surface of the nozzle is uneven.

Before launching

Configuring the servo scripts

Before starting the copter, you need to download servo.py and move it to RPi. You can simply copy and paste using the clipboard. Or copy it using the scp command. For instance:

scp servo.py pi@192.168.11.1:/home/pi

Then run the following commands remotely on the Raspberry Pi:

sudo pigpiod
python servo.py

Configuring the Web interface

Download this repository in .zip format. Copy to RPi and unpack using the following commands:

scp visual_ddrone-master.zip pi@192.168.11.1:/home/pi
cd catkin_ws/src/clover/clover/www
unzip /home/pi/visual_ddrone-master.zip .
mv visual_ddrone-master ddrone

Now to open the web interface, click on the link http://192.168.11.1/clover/drone.

Web interface

Our drone is launched via website. The web interface allows you to draw and encode what you draw in G-code. The coordinate data will be transmitted for further processing and execution by the copter.