Delta robots use three sets of parallel arms and rotary or linear actuators. Applying force to the actuators cause the end effector to travel in an x, y and z axis with no rotation. Originally developed as a pick-and-place device for lightweight loads, additional uses include 3D printing, surgery and assembly operations. The delta robot uses lightweight arms with little inertia and can be amazingly fast. Unlike arm-style machines, a delta robot can move in 360° circles within its work envelope.
Some applications of delta robots are:
packaging industry
High-precision assembly operations
Medical/Pharmaceutical operations
food processing
Cosmetics
Soldering
adhesive dispensing