The housing of a grinding spindle unit is pivotably mounted by way of a pivot axle on the receiving part of a grinding machine, e.g., on a grinding headstock. The grinding spindle unit bears a grinding wheel which is driven in rotation. The actuation of an adjusting unit extends a pressure pin, which pivots the housing of the grinding spindle unit about the pivot axle and thus slants the grinding wheel. The pivot axle is in this case formed as a film hinge through a zone of targeted elastic material deformation. A tensile spring device brings about constant contact between the pressure pin and the receiving part.

Disclosed is a multi-degree-of-freedom precise stage comprising multi-materials and using a three-dimensional printer. A multi-degree-of-freedom precise stage device comprises: a flexure hinge provided as a coupling element between an outer frame and a stage moving part; and a plurality of piezoelectric actuators provided at the outer frame so as to move a stage by the degrees of movement-freedom in multiple directions, and the stage, which has a monolithic structure, is manufactured from at least two materials having different material properties by using the three-dimensional printer.

The present invention discloses a single-drive rigid-flexible coupling precision motion platform, including a machine base, a linear guide rail, a rigid-flexible coupling motion platform, a linear driver and a displacement sensor, wherein the rigid-flexible coupling motion platform includes a rigid frame, flexible hinges and a core motion platform; and the core motion platform of the rigid-flexible coupling motion platform is connected with the rigid frame through the flexible hinges. In this arrangement, the single-drive rigid-flexible coupling precision motion platform disclosed by the present invention can realize high-accuracy continuous change displacements of the platform, thereby avoiding displacement jitter caused by sudden change of acceleration. The present invention further discloses a realization method and an application including the above platform.

A flexible mechanism and a gantry device having the same are provided. The flexible mechanism serves to compensate the positional space error caused by synchronous error, deformation or the like factor of the gantry beam. The flexible members serve to enhance the rigidity in the direction of the motional axis, in which the external force is applied to the beam. This can avoid hysteresis phenomenon of the beam during operation.

A flexure mechanism may be constructed by joining a first, second, and third material together, wherein the first and second materials are non-flexure materials and the third material is a flexure material that does not have a flexure motion-defining feature. Then, after the joining step, forming a flexure-motion defining feature into the third material. Each of the components of flexure mechanism may first be machined individually and the components may then be joined or assembled in any order. Significant tolerance stack-up may occur during the individual machining operations and joining assembly of the individual components. However, these tolerance issues, miss-alignments or other flaws in the overall assembly may be eliminated in the forming of the flexure-motion defining features as part of flexure mechanism.

A subassembly with a supporting element for a machine bed of a lathe, and of a machining unit which is arranged on the supporting element and has a machining axis, wherein a solid-body joint, via which the machining unit is arranged in a movable manner on the supporting element, is provided. A lathe for plastics spectacle lenses, having a machine bed, having a tool mount or workpiece mount which is arranged at least indirectly on the machine bed, and having a subassembly which is arranged at least indirectly on the machine bed, wherein the workpiece and the tool can be oriented in relation to one another via the solid-body joint.

A machine tool accessory including a monolithic flexure travel guide, a motor, and a position feedback sensor is provided. The machine tool accessory also includes an accessory tool spindle configured to rotate a tool, the accessory tool spindle being disposed within the monolithic flexure travel guide. The motor is configured to move the monolithic flexure travel guide, and the position feedback sensor is configured to measure position of the monolithic flexure travel guide. In some embodiments, the machine tool accessory further includes a controller configured to (i) communicatively couple to the motor, (ii) communicatively couple to one or more external devices, and (iii) cause the motor to move the accessory tool spindle in response to signals received from the one or more external devices.

The present disclosure involves occasions where precise two-dimensional motion takes place, and is applicable to XY motion stages for precise displacement compensation. The present disclosure particularly involves a stiffness-frequency adjustable XY micromotion stage based on stress stiffening, which includes X-direction and Y-direction motion sub-stages and corresponding drivers and a micromotion working table. The micromotion stage uses membrane sets that have tension levels thereof adjusted by bolts as a flexible hinge, so as to achieve independent adjustment of the vibration frequency of the XY micromotion stage. The present disclosure implements the foregoing configuration based on prestressed membrane, so the frequency is adjustable. The inherent frequency of the micromotion stage can be adjusted before or during operation according to various working conditions and driving frequency. The two feed motion direction are perpendicular so as to prevent the micromotion working table from coupling during two-dimensional motion.

The technology disclosed in the present disclosure is a method for correcting a yaw of an X-Y stage, including: moving an XY moving body in an X-axis or Y-axis direction using an actuator; measuring a yaw, which is a rotational displacement of the moved XY moving body, using a sensor; calculating, by a controller, a rotational stiffness value to be corrected, using the measured yaw data; and adding yaw correction flexures having a stiffness corresponding to the rotational stiffness value to be corrected to the X-Y stage.