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The world's cheapest, simplest pen plotter (~$14, an hour to build)
source link: https://www.tuicool.com/articles/Yvmaaqe
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BrachioGraph - the cheapest, simplest possible pen-plotter
BrachioGraph - arm-writer - is an easy-to-build pen-plotter, driven by a library of simple Python applications.
- two pieces of stiff card
- a ballpoint pen
- 3 servo motors
- a Raspberry Pi, to drive the servos and run the custom code
Tools required:
- a knife
- glue
- a ruler
brachiograph.py linedraw turtle_draw.py pulse_widths.ipynb pantograph.py
Get started
Build the machine, install the software, make basic tests
How-to guides
Improve the calibration, process images, visualise plotter behaviour, alternative designs
Explanation
Understanding the mathematics, choosing hardware.
Reference
Guide to key classes and functions
About the documentation
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