plotbot
Python code for Line-us clone. After reading the post, I redesigned the model with Fusion360. You can download the Fusion360 file here
The Line-us drawing robot is a much finer product and more accurate than this one.
Hardware:
- raspberry pi zero w
- Adafruit PCA9685 PWM servo controller
- metal geared 9g servo X3
- 4x10x8mm bearing X3, or 4x10x4mm bearing X6
- button X1
Dependency:
pip install pyyaml adafruit-pca9685 gpiozero flask flask-socketio
git clone https://github.com/hyansuper/linedraw
git clone https://github.com/hyansuper/flask_video_streaming
How to use:
export PYTHONPATH=$PYTHONPATH:$pwd
git clone https://github.com/hyansuper/plotbot
cd plotbot
change conf.yaml file according to your servo settings
cd examples
run 'python web_app.py' or 'python sketch_app.py'
then visit <pi_zero_ip_address>:5000
Tips for 3D print:
The stiffness of the arm greatly affects the output, to achieve good result, you'll need good quality bearings, and the 4 links making up the arm should be printed with 100% infill.
Also, the links need some sanding to fit in the bearings