A rotary scale apparatus for an encoder apparatus including a planar disc on which at least one track including scale features is provided, in which the planar disc includes a hole through its centre for receiving a cylindrical shaft, and in which the rotary scale member includes at least three cantilevered spring members which are provided substantially in plane with the planar disc and spaced around the edge of the hole, for engaging with, and radially locating the disc on, a cylindrical shaft inserted therethrough.

A device for determines the torque and/or the rotary angle between a first shaft and a second shaft, which are coupled via a gear mechanism to rotate relative to one another about an axis of rotation. The first shaft has a first end region, a second end region, and a first direction vector pointing in parallel with the axis of rotation from the first end region to the second end region, and the second shaft has a first end region, a second end region, and a second direction vector pointing in parallel with the axis of rotation from the first end region to the second end region. The first shaft is designed as a hollow shaft and the second shaft is arranged coaxially in the first shaft in such a way that the first direction vector and the second direction vector have the same orientation.

A system for detecting rotational over travel includes: an angular position sensor comprising a rotor rotatable about an axis, the angular position sensor configured to output one or more electrical signals to indicate an angular position of the rotor about the axis and/or a number of turns completed by the rotor about the axis; and a device comprising a first operating mode and a second operating mode and configured to transition from the first operating mode to the second operating mode in response to the rotor rotating beyond at least one angular position threshold, wherein the transition from the first operating mode to the second operating mode is independent of the one or more electrical signals.

An encoder includes a rotatable encoder disc. A clamp is fixed to the encoder disc to rotate therewith. The clamp includes an arcuately extending body presenting a radially inner face and arcuately spaced apart ends defining a gap therebetween. The inner face extends along a clamping path and engages a rotating component to secure the clamp to the rotating component to rotate therewith. The clamp includes an adjustment mechanism for modifying an arcuate extent of the gap by shifting the ends relative to one another and, in turn, modifying the clamping path. The body defines a radially extending cutout facilitating bending of the body in association with expansion or contraction of the gap and modification of the clamping path. The clamp includes a raised boss extending from a front face thereof. The boss presents a contact face spaced axially from the front face and fixedly engaging the encoder disc.

A linear rotary encoder includes a pair of rotational surfaces. A contact belt has a first end coupled to a first rotational surface in the pair and a second end coupled to a second rotational surface in the pair. The contact belt is driven to rotate around the pair of rotational surfaces by a driving force applied to media to move the media from the first end toward the second end. An encoding scale is coupled to an inner surface of the contact belt. A reader is positioned to read the encoding scale as the contact belt rotates around the pair of rotational surfaces. The reader generates an output signal indicating a position of the media based on reading of the encoding scale.

A desktop horizontal joint robot, including: a lift apparatus and a fixation apparatus. The lift apparatus includes: a base, a casing supported on the base, a slider seat liftably arranged within the casing, and a lift driving mechanism configured to move the slider seat. The fixation apparatus includes: a fixation seat in fixed connection with the slider seat, a first rotational shaft rotatably supported at the fixation seat, and a first shaft driving assembly configured to rotate the first rotational shaft. An optical length encoder is arranged within the casing and configured to detect a linear displacement of the slider seat. The fixation apparatus further include a first optical angle encoder configured to detect a rotation angle of the first rotational shaft. The desktop horizontal joint robot features non-wear, high reliability, and long service life.

In a rotary motion detecting device that outputs a signal corresponding to rotary motion of a rotary disk coupled to a shaft, a boss is fixed to the shaft, the boss is fixed to one surface of the rotary disk, and one of the boss and the shaft is a hole member having a hole formed therein and the other is an inserted member that is inserted in the hole. The hole member has an inner periphery (inner diameter) that is larger than an outer periphery (outer diameter) of the inserted member so that the shaft can be vertical to the rotary disk without being restricted by the boss.

An angle measuring device includes first and second component groups and a bearing. The first component group includes a scale element having a first graduation. The second component group has a first modular unit, including a position sensor, and a second modular unit, including first, second, and third position transducers, and a compensation coupling. The first and second modular units are connected in a torsionally stiff but axially and radially flexible manner. The angle measuring device is operable in first and second modes. In the first mode, the first graduation is scannable by the position sensor to determine a first angular position. In the second mode, the first graduation or a further graduation situated on the scale element is scannable by the position transducers to determine further angular positions. A corrected relative angular position is determinable based on the first angular position and the further angular positions.

A rotational structure is configured such that a hollow portion, in which a base member is opposed to a rotational member, is formed around a shaft member. An encoder provided in the hollow portion includes a detection target member rotated together with one of the rotational member and the base member and having a physical quantity changing in a circumferential direction, and a detector capable of detecting the physical quantity of the detection target element and rotated together with the other of the rotational member and the base member.

A linear rotary encoder includes a pair of rotational surfaces. A contact belt has a first end coupled to a first rotational surface in the pair and a second end coupled to a second rotational surface in the pair. The contact belt is driven to rotate around the pair of rotational surfaces by a driving force applied to media to move the media from the first end toward the second end. An encoding scale is coupled to an inner surface of the contact belt. A reader is positioned to read the encoding scale as the contact belt rotates around the pair of rotational surfaces. The reader generates an output signal indicating a position of the media based on reading of the encoding scale.