A coordinate measuring machine including a surface plate; a probe moving body; an INC pattern and ABS pattern along a moving direction of the probe moving body; an INC detector that outputs a plurality of waveform signals in accordance with the moving amount based on the INC pattern; an ABS detector that outputs an absolute position signal of the probe moving body based on the ABS pattern in response to a request signal; and a control device that has a INC counting portion that counts the waveform signals outputted by the INC detector; a position information obtaining portion that reads a counted value at a timing when a work is detected by a probe; and a presetting portion that emits the request signal to the ABS detector to obtain the absolute position signal, and presets the counting portion to this absolute position signal.

Template matching with an image captured by the first imaging element is performed to obtain a first movement amount in a circumferential direction of the first mark, template matching with an image captured by the second imaging element is performed to obtain a second movement amount in a circumferential direction of the second mark, and a rotation angle is calculated and output by using the first movement amount and the second movement amount.

A sensor configured to detect displacement of a rotation angle of a shaft due to a rotation or a turn of the shaft, the sensor includes: a bearing rotatably supporting the shaft; and a housing including a bearing hole to which the bearing is fixed. The shaft and an inner circumferential surface of the bearing are fixed to each other by an adhesive agent, and an outer circumferential surface of the bearing and an inner circumferential surface of the bearing hole of the housing are fixed to each other by an adhesive agent.

A method of mounting a rotary scale member on a part, the rotary scale member including a body on which a series of position features defining a scale is provided, and at least one mounting flexure configured to engage the part, the method including: force-fitting the rotary scale member and the part together, whereby the at least one flexure is displaced by the part and thereby urged via a radial reaction force into engagement with the part so as to form a friction fit with the part such that the body of the rotary scale member self-locates at an initial default radial location with respect to the part; and tweaking the radial location of the body relative to the part away from its initial default radial location to a new radial location.

A sensor device may be utilized to detect an angular position of a rotating shaft that is rotatably supported in a housing. The sensor device may include a transducer magnet that is attached to a supporting part that is connected to the rotating shaft. The supporting part may be joined to the transducer magnet by an ultrasonic weld. The ultrasonic weld may be bonded and shape-locking. The supporting part may be configured as a sonotrode during creation of the ultrasonic weld. Further, an exterior of the supporting part, which can be a supporting rod, may comprise cross knurling or longitudinal knurling.

A method of mounting rotary scale member on machine part includes: locating rotary scale member on machine part such that scale axis and axis of rotation are substantially parallel, and subsequently arranging at least a first radial adjustment device to contact both machine part and rotary scale member, and manipulating the at least first radial adjustment device to radially displace body of rotary scale member. At least the majority of any radial reaction force, generated as a result of the interaction of at least one of the flexures with a radial stop member against which it is radially pressed, and which is imparted on the at least first radial adjustment device by rotary scale member in opposition to the radial displacement of the rotary scale member, is directed into, and reacted by, the machine part via the contact between the at least first radial adjustment device and the machine part.

A method of determining any offset between: a scale axis of a disc scale member having a planar surface on which is provided a series of scale features defining a scale that extends and is centred around the scale axis, the scale axis extending normal to the planar surface; and the axis of rotation of a machine part on which the disc scale member is mounted, wherein the axis of rotation and the scale axis of the disc scale member are substantially parallel. The method includes: determining any offset between the scale axis and the axis of rotation via inspection of an axially-extending surface provided with the disc scale member.

A retaining device for coupling an encoder unit of a rotary encoder to an electric machine includes an end shield having a guide groove for receiving an encoder module of the encoder unit, and a retaining ring including a first coupling element for mechanically coupling the retaining ring to the end shield, with the first coupling element being embodied as a hole. A fastening screw is received in the hole to mechanically fasten the retaining ring to the end shield. A shielding element is integrally formed on the retaining ring for shielding against an external interference field.

In an encoder device, a first gear is made of a transparent resin allowing transmission of light and includes: a detection target on which an optical pattern for detecting the absolute rotation angle within one rotation is formed, and a plurality of teeth formed on the outer periphery of the detection target. A first sensor includes a light emitter configured to emit light toward the detection target and a light receiver configured to receive the light transmitted through the detection target.

The present disclosure provides a collaborative robot arm and a joint module. The joint module includes a housing, a driving assembly, and a multi-turn absolute encoder. The joint module detects the angular position of the output shaft and records a number of rotating revolutions of the output shaft only by means of the multi-turn absolute encoder. The multi-turn absolute encoder includes a base, a bearing, a rotating shaft, an encoding disk, and a circuit board, the encoding disk is rotatably connected with the base by the rotating shaft and the bearing, the circuit board is fixedly connected with the base, and the reading head on the circuit board detects the angular position of the output shaft cooperatively with the encoding disk, making the multi-turn absolute encoder be an integrated structure. The base and the rotating shaft are detachably connected with the housing and the output shaft respectively.