For most linear motion applications, conventional belt- or screw-driven systems work well. However, issues can arise when longer linear distances are required.
Belt-driven systems are an obvious choice when long linear movements are required. These relatively straightforward systems use pulley drives to create tension along the belt, and they can be brought quickly up to high speeds. However, as these systems reach longer strokes, issues can arise with sagging belts. Tension cannot be maintained across the length of the system.