Abstract:
A robot wrist with a plurality of rotatable parts (1,2,3) arranged in series with each other arranged to be mounted on a robot arm or automation machine to enable rotary movement of the first wrist part (1) about a first axis, and a second wrist part (2) journalled in the first wrist part. Rotary drive for the sixth axis, tool holder or flange (7) is transferred by a flexible drive member (4) from an input drive means in the proximity of the first wrist part to the tool flange at the distal end of the robot arm. The robot wrist may preferably comprise an inner protection hose. The flexible drive member (4) may be arranged as an inner hose (4).
Abstract:
A robot wrist comprises a first wrist part (1) configured to be mounted to a robot arm, a second wrist part (2) rotatable in relation to the first wrist part (1) about a first axis of rotation (A 1 ), a third wrist part (3) rotatable in relation to the second wrist part (2) about a second axis of rotation (A 2 ), and a protection hose (4) extending through the robot wrist. The first axis of rotation (A 1 ) intersects with the second axis of rotation (A 2 ) within a boundary wall of the protection hose (4) in at least one position of the robot wrist. Intersection of the first and the second axes of rotation (A 1 , A 2 ) within the boundary wall of the protection hose (4) is achieved by making the second wrist part (2) compact in the longitudinal direction of the protection hose (4), and wide in the radial direction of the same. As a result the protection hose (4) is arranged in a single circular arc in a bent position of the robot wrist, which in its turn results in an improved service life of the protection hose (4).
Abstract:
A method for controlling a painting system comprising an industrial robot or manipulator arm arranged with a wrist section and carrying a paint applicator arranged on the robot wrist. Paint is applied by the applicator to a substantially circular or elliptical area on said surface, and the centre of the area is defined as a Tool Centre Point. The wrist section is arranged capable of moving and orienting the paint applicator. In the improved method the paint applicator is moved by said manipulator arm so that the Tool Centre Point moves along a planned path so coating a part of said surface. The planned path may comprise one or more bends. The path taken by the robot wrist may be controlled to follow a different path from the path taken by the TCP. A system and a computer program for carrying out the method are also described.