index.rst

BrachioGraph - the cheapest, simplest possible pen-plotter

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BrachioGraph - arm-writer - is an easy-to-build pen-plotter, driven by a library of simple Python applications.

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The hardware

The plotter is made of:

• two sticks
• a pen or pencil
• a clothes-peg
• 3 servo motors
• a Raspberry Pi, to drive the servos and run the custom code
• glue

Total cost: ~€14

The software

The software in the BrachioGraph library includes code to :ref:`drive the hardware <start-plotting>` and :ref:`vectorise bit-map images <use-linedraw>`.

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From bitmap to plot via vectorisation

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Contents

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:doc:`Get started <get-started/index>`

Build the machine, install the software, make basic tests

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:doc:`How-to guides <how-to/index>`

Improve the calibration, process images, visualise plotter behaviour, alternative designs

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:doc:`Explanation <explanation/index>`

Understanding the mathematics, choosing hardware.

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:doc:`Reference <reference>`

Guide to key classes and functions

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About the documentation

Why is the documentation structured this way?

.. toctree::
    :maxdepth: 1
    :hidden:

    Get started <get-started/index>
    How-to guides <how-to/index>
    Reference <reference/index>
    Explanation <explanation/index>