{{Redir|Polargraph|the similarly named instant film|Polagraph|the coordinate system|Polar graph}} [[File:Polargraph Gosper curve.jpg|thumb|A fourth stage [[Gosper curve]] plotted on a whiteboard polargraph.]] A '''polar plotter''' also known as '''polargraph''' or '''Kritzler''' is a [[plotter]] which uses [[two-center bipolar coordinates]] 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 [[maker culture|makers]], including:
* Jürg Lehni & Uli Franke (2002) <ref>{{cite web|last1=Lehni|first=Jurg|title=Hektor is a portable spray paint output device for computers| url=http://juerglehni.com/works/hektor/}}</ref> * Ben Leduc-Mills (2010) <ref>{{cite web|last1=Leduc-Mills|first=Ben|title=HSADbot (The Seasonally Affected Drawing Robot) | url=http://benatwork.cc/sadbot/}}</ref> * Alex Weber (2011) <ref>{{cite web|last1=Weber|first1=Alex|title=Der Kritzler|url=http://tinkerlog.com/2011/09/02/der-kritzler/|website=Tinkerlog|accessdate=29 June 2015}}</ref> * Harvey Moon<ref>{{cite web|last1=Holmes|first1=Kevin|title=Robots That Create Art: Harvey Moon's Drawing Machines|url=https://www.vice.com/en/article/harvey-moons-drawing-machines/|website=Vice|access-date=29 June 2015}}</ref> * Sandy Nobel (2012) <ref>{{cite web|last1=Nobel|first1=Sandy|title=What's a polargraph|url=http://www.polargraph.co.uk/whats-a-polargraph/|website=Polargraph|accessdate=29 June 2015}}</ref> *[[Maslow CNC]]
== References == {{Reflist}}
== External links == * [http://www.instructables.com/id/Polargraph-Drawing-Machine/ Polargraph Drawing Machine] * [http://tinkerlog.com/2011/09/02/der-kritzler/ Der Kritzler] * [http://www.polargraph.co.uk/whats-a-polargraph/ polargraph.co.uk] * [https://github.com/gonzam88/melt-app/ Melt (Open Source Polargraph Controller)]
[[Category:Plotters]]