A polar plotter also known as polargraph or Kritzler is a

plotter A plotter is a machine that produces vector graphics drawings. Plotters draw lines on paper using a pen, or in some applications, use a knife to cut a material like vinyl or leather. In the latter case, they are sometimes known as a cutting pl ...

which uses

two-center bipolar coordinates In mathematics, two-center bipolar coordinates is a coordinate system based on two coordinates which give distances from two fixed centers c_1 and c_2. This system is very useful in some scientific applications (e.g. calculating the electric fi ...

to produce vector drawings using a pen suspended from strings connected to two pulleys at the top of the plotting surface. This gives it two degrees of freedom and allows it to scale to fairly large drawings simply by moving the motors further apart and using longer strings. Some polar plotters will integrate a raising mechanism for the pen which allows lines to be broken while drawing. The system has been used by a number of artists and makers, including: * Jürg Lehni & Uli Franke (2002) * Ben Leduc-Mills (2010) * Alex Weber (2011) * Harvey Moon * Sandy Nobel (2012) *

Maslow CNC Maslow CNC is an open-source CNC router project. It is the only commercially available vertical CNC router and is notable for its low cost of US$500. Although the kit is advertised at $500, like many tools, additional initial material and hardw ...

References

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External links

Polargraph Drawing Machine

Der Kritzler

polargraph.co.uk

Melt (Open Source Polargraph Controller)
Plotters