I am doing similar drawings with Sandy Noble's Polargraph (http://www.polargraph.co.uk http://www.polargraph.co.uk). How do you keep the liquid chalk flowing? C

I am doing similar drawings with Sandy Noble's Polargraph (http://www.polargraph.co.uk http://www.polargraph.co.uk). How do you keep the liquid chalk flowing? Common liquid chalk pens need pumping over time. art+com created a massive chalkbot at Jelling Museum in Denkmark: https://artcom.de/en/project/experience-centre-royal-jelling-2/ https://artcom.de/en/project/experience-centre-royal-jelling...