The compasses are used to draw perfect circles with a radius of 3 to 10 centimeters. It consists of a base around which the arm can rotate. Along the arm there is a centimetre scale that can be used to position the drawing point, sliding it along the length of the arm. The next video shows the different components of the compasses, the way the foot can be positioned and how to draw a circle.
Important: these videos show a previous version of the TactiPad. The appearance of some components has changed in newer versions of the drawing board, yet the functionality is still the same.