
There were also physical and technological
hurdles to overcome, including humidity; dry
conditions caused static electricity to accumulate
in the very fine sand, which clogged the tubing.
Many plastic and glass vessels were tested until
a method of depositing the free-flowing fine sand
onto the surface was found, but they still needed
to figure out how to do this in a fluid manner.
Eventually the AxiDraw in combination with
Gregg Wygonik’s SquiggleDraw algorithm (github.
com/gwygonik/SquiggleDraw) achieved finer
control of the gradient values to display a greater
grayscale range. This was made possible by
controlling the amplitude of plotted ...