Abstract: A touch probe includes a base structure and a stylus supporting member. The base structure and stylus supporting member are connected by six extensible legs that permit the stylus supporting member to move with six degrees of freedom relative to the base structure. A plurality of sensors are arranged to measure movement of the stylus supporting member relative to the base structure along all six axes.

Abstract: A metrology device determines the position of a machine component relative to a datum along three linear and three rotational axes. The metrology device has a pair of support structures connected by six legs that are each disposed at an angle with respect to the next adjacent leg. One of the support structures can be connected to the datum and the other can be connected to the machine component. A sensor cooperates with each leg to sense the actuation of that leg as the support structures move relative to one another. The combination of signals provided by the legs can be used to track movement of the machine component relative to the datum.

Abstract: A three-axis machine control structure includes a support structure and a machine component to which a workpiece or tool can be attached. Three control arms are connected between the machine component and the support structure. Preferably, each control arm is pivotably connected to the support structure and to the machine component and includes a pair of four-bar linkages connected in series. The control arms are oriented to permit rapid movement of the machine component along any or all of the three linear axes, while restricting movement of the machine component along the rotational axes.

Abstract: A three-axis machine is disclosed. The machine includes a machine component to which a workpiece or tool can be attached. An actuator, such as three powered extensible legs, is connected between the machine component and a support structure. Three control arms also are connected between the machine component and the support structure. Preferably, each control arm is pivotably connected to the support structure and the machine component and includes a pair of four-bar linkages connected in series. The control arms are oriented to permit rapid movement of the machine component along any or all of the three linear axes, while restricting rotational movement of the machine component along the rotational axes.

Abstract: A multi-axis machine is disclosed. The machine includes an adjustable external framework having a pair of support structures connected by a plurality of servostruts. A multi-axis manipulator is attached to one support structure and may be designed to carry a tool. A workpiece may be attached to the other support structure for interaction with the tool as the tool is moved by the multi-axis manipulator. The controlled extension and retraction of both the framework struts and manipulator struts provide the multi-axis machine with increased versatility of operation.

Abstract: A linear actuator cylinder reduces the stiction otherwise present during initiation of rod extension or retraction. The actuator cylinder includes a cylinder assembly having a piston that slides longitudinally through a cylinder barrel. A rod is connected to the piston and extends from the cylinder barrel. A rotator mechanism is connected to the rod to rotate the piston and rod with respect to the cylinder barrel. The rotator mechanism typically includes a hydraulic or electric motor connected to the rod by, for example, a chain engaged with a pair of sprockets.