Abstract: A valve timing control apparatus of an internal combustion engine may include a driving rotational body to which torque is transmitted from a crankshaft, a driven rotational body fixed to a camshaft to which torque is transmitted from the driving rotational body, an electric motor disposed between the driving rotational body and the driven rotational body and relatively rotating the driving rotational body and the driven rotational body when electric power is applied thereto, and a deceleration mechanism that decelerates a rotational speed of the electrical motor and transmit the decelerated rotational speed to the driven rotational body.

Abstract: The cutting device includes a rotating portion for rotating the cutting tool in a rotation axis line of the cutting tool and a traveling means for making the cutting tool travel relative to a workpiece. The rotating means and the traveling means rotates the outer peripheral surface of the cutting tool and makes the cutting tool travel, having the outer peripheral surface function as the rake surface, so as to perform cutting machining.

Abstract: An actuator of a variable compression ratio mechanism which includes: a control link; a control shaft; a housing; a wave gear speed reduction device arranged to transmit the reduced rotation speed to the control shaft; a first bearing portion which is provided between the control shaft and a wave generation device of the wave gear speed reduction device, and which rotatably supports a first axial end portion of the wave generation device; and a second bearing portion which is provided between the housing and the wave generation device, and which rotatably supports an second axial end portion of the wave generation device, at least one of the first bearing portion and the second bearing portion being disposed inside an axial width of an outer circumference portion of the wave generation device.

Abstract: The present invention discloses a machining control apparatus capable of decreasing a machining error, comprising: a rotation velocity decision process part for deciding a rotation velocity of the rotation tool in such a way that an amplitude of vibration of the rotation tool is decreased, based on a vibration state of the rotation tool and a vibration phase of the rotation tool when the rotation tool receives the cutting resistance force, in the case that the rotation tool vibrates due to the interrupted cutting resistance force generated in the rotation tool during the interrupted cutting; and a rotation velocity control part for controlling the rotation velocity(S) of the rotation tool based on the rotation velocity decided.

Abstract: An actuator of a variable compression ratio mechanism includes: a control link; an arm link; a control shaft; a housing including a receiving portion in which a connection portion between the second end portion of the control link and the arm link is received, and a support hole formed within the housing, and rotatably supporting the control shaft; and a speed reduction device, the control shaft including a fixing portion inserted and fixed within the receiving portion in a fixing hole formed in the arm link at a predetermined axial position, and a first journal portion which is formed at a tip end portion of the control shaft, which has a diameter smaller than a diameter of the fixing portion, and which is supported by a first bearing hole formed in the support hole.

Abstract: An actuator of a variable compression ratio mechanism which includes: a control link; a control shaft; a housing; a wave gear speed reduction device arranged to transmit the reduced rotation speed to the control shaft; a first bearing portion which is provided between the control shaft and a wave generation device of the wave gear speed reduction device, and which rotatably supports a first axial end portion of the wave generation device; and a second bearing portion which is provided between the housing and the wave generation device, and which rotatably supports an second axial end portion of the wave generation device, at least one of the first bearing portion and the second bearing portion being disposed inside an axial width of an outer circumference portion of the wave generation device.

Abstract: A controller including a detecting member detecting a machining position where a pivoting axis is reversed in machining by the machine tool based on the control data, an allowable position error setting member setting an allowable position error between a commanded machining position and an actual machining position, an allowable acceleration deciding member deciding the allowable acceleration about the pivoting axis based on a distance from the machining position of the reversed axis to a center of the pivoting axis and based on the allowable position error being set, and a controlling member controlling a velocity about the driving axis based on the allowable acceleration.

Abstract: A fundus photographing apparatus includes a wavefront detecting optical system having a wavefront sensor for receiving reflection light from a fundus and measuring wavefront aberration of an eye, a wavefront compensating device for compensating the wavefront aberration, and a deviation detecting part for detecting deviation information corresponding to deviation between an effective region in which aberration compensation by the wavefront compensating device is effective, and a wavefront measuring region in which the wavefront aberration is measured by the wavefront detecting optical system, with respect to a direction perpendicular to an optical axial direction.

Abstract: A controller for a machine tool and a five axis simultaneous control machine tool which can improve machining accuracy in controlling a pivoting axis of the machine tool. The controller including an allowable position error setting member setting an allowable position error between a commanded machining position and an actual machining position; a velocity control parameter deciding member deciding a velocity control parameter of the pivoting axes of the A-axis and the B-axis in accordance with the allowable position error being set and a distance of said actual machining position from the pivoting axes; and a controlling member controlling a velocity of the pivoting axes based on the velocity control parameter.

Abstract: A valve control apparatus includes a drive shaft; a control shaft including a control shaft main body configured to be rotationally controlled according to a state of engine, and a control eccentric shaft located eccentrically relative to a rotation center of the control shaft main body; a rocker arm swingably supported by the control eccentric shaft and configured to convert a rotational motion of the drive shaft to a swinging motion; and a swing cam configured to open/close an engine valve according to the swinging motion of rocker arm. Both ends of the control eccentric shaft are formed with fixing holes extending in a radial direction of the control eccentric shaft. The control shaft main body is formed with insertion holes passing through the control shaft main body in a radial direction of the control shaft main body. The insertion holes respectively face the fixing holes. The control eccentric shaft is fixed to the control shaft main body by bolts.

Abstract: A dynamic characteristic calculation apparatus for a machine tool calculates dynamic characteristic of the machine tool executing an interrupted machining by moving a rotational tool relative to a workpiece. The apparatus includes a detector detecting acoustic wave generated by vibration of the rotational tool or detecting magnetic property being variable by the vibration of the rotational tool where said rotational tool is excited to vibrate, and a calculation division calculating a natural frequency f of the one or plural tool tips in a vibration system, in which the one or plural tool tips of said rotational tool is a vibration body, on a basis of a value detected by the detector.

Abstract: The present invention discloses a machining control apparatus capable of decreasing a machining error, comprising: a rotation velocity decision process part for deciding a rotation velocity of the rotation tool in such a way that an amplitude of vibration of the rotation tool is decreased, based on a vibration state of the rotation tool and a vibration phase of the rotation tool when the rotation tool receives the cutting resistance force, in the case that the rotation tool vibrates due to the interrupted cutting resistance force generated in the rotation tool during the interrupted cutting; and a rotation velocity control part for controlling the rotation velocity(S) of the rotation tool based on the rotation velocity decided.

Abstract: A variably operated valve system includes: a planar section cut out an outer peripheral surface of a control shaft in order for a linkage member to be grasped from an axial direction of the control shaft; a bolt hole drilled along a diameter direction of the control shaft via an oil passage from the planar section and having a female screw formed at a position of the control shaft which is an opposite side to the planar section; and a limitation section having a convexity section disposed on either one of the linkage member and the planar section and a recess section disposed on the other of the linkage member and the planar section to be fitted into the convexity section, a fixture bolt being screwed and tightened to the bolt hole via a bolt inserting hole of the linkage member to fix the linkage member to the control shaft.

Abstract: A fundus photographing apparatus includes a first photographing unit arranged to obtain a first fundus image and including a first illumination optical system including a first light source and a scanning unit, a first photographing optical system and a wavefront compensating unit including a wavefront sensor and a wavefront compensating device, a second photographing unit arranged to obtain a second fundus image of a wide area including a scanning area by the scanning unit and including a second illumination optical system and a second photographing optical system arranged to obtain the second fundus image with a wider view angle under lower magnification than the first fundus image, a monitor, and a control unit arranged to display on the monitor the first and second fundus images, and display an indicator on the second fundus image displayed on the monitor, the indicator indicating a photographed portion of the first fundus image.

Abstract: It is an object of the present invention to provide a machining parameter optimizing apparatus deciding a tool axis attitude and a machining zone and deciding a tooling having high stiffness for any profile of a finished workpiece. A tool axis attitude deciding member 21 decides one or plural tool axis attitude. An interference dangerous zone deciding member 23 decides as an interference dangerous zone a zone possible to interfere between a tool or a tool holder and a workpiece during machining by the decided tool axis attitude. A machining simulation member 25 executes a machining simulation based on the interference dangerous zone by the decided tool axis attitude and generates the virtual tool holder in which there is no any interference, and also decides a machining zone in a way of avoiding the interference dangerous zone.

Abstract: A fundus photographing apparatus includes a wavefront detecting optical system having a wavefront sensor for receiving reflection light from a fundus and measuring wavefront aberration of an eye, a wavefront compensating device for compensating the wavefront aberration, and a deviation detecting part for detecting deviation information corresponding to deviation between an effective region in which aberration compensation by the wavefront compensating device is effective, and a wavefront measuring region in which the wavefront aberration is measured by the wavefront detecting optical system, with respect to a direction perpendicular to an optical axial direction.

Abstract: In a variable valve system for an internal combustion engine and its driving mechanism, the variable valve system comprises: a variable mechanism that revolves a control axle to change an operation characteristic of an engine valve; a projection section projected at an outer peripheral predetermined position in an axial direction of the control axle and on a tip of which a fixture section is formed; a fixture member fixed in a grasped state for the projection member via an engagement member engaged on the fixture section; a driving mechanism configured to provide a rotating force for the control axle via the fixture member; and control means (a control section) for controlling the driving mechanism in accordance with a driving state of the engine.

Abstract: A variable valve actuation apparatus of an internal combustion engine has a multinodular-link motion converter, to vary at least a working angle. A position of rotation of a control shaft, variably adjusting the attitude of the motion converter, is set, so that, at a peak lift during a valve opening period, an angle ?2 between an extension line of a line segment connecting a first fulcrum corresponding to a drive-eccentric-cam center and a second fulcrum provided on a rocker arm and a line segment connecting the second fulcrum and a third fulcrum provided on the rocker arm at a position different from the second fulcrum at a middle working-angle control mode is less than both an angle ?1 between the two line segments at a minimum working-angle control mode and an angle ?3 between the two line segments at a maximum working-angle control mode.

Abstract: A valve control apparatus includes a drive shaft; a control shaft including a control shaft main body configured to be rotationally controlled according to a state of engine, and a control eccentric shaft located eccentrically relative to a rotation center of the control shaft main body; a rocker arm swingably supported by the control eccentric shaft and configured to convert a rotational motion of the drive shaft to a swinging motion; and a swing cam configured to open/close an engine valve according to the swinging motion of rocker arm. Both ends of the control eccentric shaft are formed with fixing holes extending in a radial direction of the control eccentric shaft. The control shaft main body is formed with insertion holes passing through the control shaft main body in a radial direction of the control shaft main body. The insertion holes respectively face the fixing holes. The control eccentric shaft is fixed to the control shaft main body by bolts.

Abstract: It is an object of the present invention to provide a controller for a machine tool and a five axis simultaneous control machine tool controlled thereby which can improve the machining accuracy in machining by controlling a driving axis including a linear axis and a pivoting axis. The controller comprises a detecting member 102 detecting a machining position where a pivoting axis is reversed in machining by the machine tool 1 based on the control data, an allowable position error setting member 103 setting an allowable position error ? between a commanded machining position P1 and an actual machining position P2, an allowable acceleration deciding member 107 deciding the allowable acceleration about the pivoting axis based on a distance L1, L2 from the machining position of the reversed axis to a center of the pivoting axis and based on the allowable position error ? being set, and a controlling member 108 controlling a velocity about the driving axis based on the allowable acceleration.