A non-Cartesian coordinate positioning machine that includes an extendable leg assembly for positioning a component such as a measurement probe within a working volume of the machine. The extendable leg assembly includes a first member and a second member which move relative to one another when the extendable leg assembly changes length. The first member including an axial arrangement of magnets forming part of a linear motor for extending and retracting the extendable leg assembly, and at least one resilient member for absorbing at least some of any axial thermal expansion or contraction of the magnets in use.

In an example, an apparatus may include a first elongated member having a hollow core and a first end, a second elongated member extending partially into the hollow core of the first elongated member, a driving mechanism to move the first elongated member with respect to the second elongated member to vary a distance between the first end and the second elongated member, and a control circuit housed within the second elongated member, in which the control circuit is to control the driving mechanism to vary a position of the first end with respect to the second elongated member. The apparatus may also include a load cell to detect a physical load applied onto the apparatus, in which the load cell is to communicate the detected physical load to the control circuit.

The present disclosure discloses a five-degree-of-freedom hybrid robot with rotational supports. A first and a second fixed shaft seats are rotatably connected to a first and a second rotational support through a hinge, respectively. One end of a first length adjustment device runs through the first rotational support, and the other end is fixedly connected to a moving platform. One end of each of the second and third length adjustment devices runs through the first rotational support and is then connected to the moving platform, respectively. Middle portions of the first, second and third length adjustment devices are each hinged onto the first rotational support. One end of a fourth length adjustment device runs through the second rotational support and is connected to the moving platform. Middle portion of the fourth length adjustment device is hinged onto the second rotational support.

The present disclosure discloses a five-degree-of-freedom hybrid robot with rotational supports. A first and a second fixed shaft seats are rotatably connected to a first and a second rotational support through a hinge, respectively. One end of a first length adjustment device runs through the first rotational support, and the other end is fixedly connected to a moving platform. One end of each of the second and third length adjustment devices runs through the first rotational support and is then connected to the moving platform, respectively. Middle portions of the first, second and third length adjustment devices are each hinged onto the first rotational support. One end of a fourth length adjustment device runs through the second rotational support and is connected to the moving platform. Middle portion of the fourth length adjustment device is hinged onto the second rotational support.

A system for machining a workpiece. The system includes a rotatable frame mounted to a base and arms which can translate relative to the rotatable frame. The arms are attached directly or indirectly to a machining tool which can be moved to various points around the workpiece and include tools for various machining operations.

A surgical robotic arm includes a presurgical positioning assembly, a telecentric manipulating assembly and an executing assembly; the telecentric manipulating assembly includes a static platform, a first movable platform and a plurality of first telescopic elements disposed between the static platform and the first movable platform; the executing assembly has a preset telecentric fixed point; the plurality of first telescopic elements are capable of moving the first movable platform; a swing center of the executing assembly is the telecentric fixed point.