This type of robot is based on the principle of parallel kinematics.
All drives are mounted in a fixed position on the robot head. Motor cables are not moved. The robot has three (3) translational and one (1) rotational degree(s) of freedom.
This robot mechanic is suitable for applications that require maximum repeatability, absolute accuracy and path accuracy in the 1/1000 mm range thanks to its high-end direct drives and high-precision joints.
