The three stepper motors control each section of the mechanims. They are attached to gears which come into contact with gears attached to the stem of the product. Each motor is controlled separately so a variety of forms for the membrane is possible. The stepper motors are held up in the correct position by blocks of macrocarpa. The box that contains these is made of 5mm clear acrylic and the material for the structural skeleton for the product is made of 3mm clear acrylic. The rods in the shaft is 1.4mm and is in a 2.4mm rod which is inside of a 3.2mm aluminium rod.
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