Abstract: A machine tool re-machines a workpiece after positioning drive motors, a hob and the workpiece by stopping the drive motors with the rotational positions of the drive motors, the hob and the workpiece corresponding to their respective zero positions. For this purpose, a drive control section recognizes, based on the rotational-speed ratio of the drive motor corresponding to the hob and the hob and/or the rotational-speed ratio of the drive motor corresponding to the workpiece to the workpiece, and detection signals from detection sensors detecting that the rotational positions of the drive motors are at their respective zero positions, detections signals when the rotational positions of the drive motors and the rotational positions of the hob and the workpiece correspond to their respective zero positions, and stops the drive motors with the rotational positions of the drive motors, the hob and the workpiece corresponding to their respective zero positions.

Abstract: A controller for a conventional synchronous motor is configured to produce desired output characteristics. The controller generates a drive current for based on a current command, has a motor correcting section and a gain adjusting section which output a compensated current command based on the current command according to a compensating transfer function for cancelling a first transfer function showing a first torque response characteristic of the synchronous motor and replacing it with a second transfer function showing a second torque response characteristic, and a current controller which generates a drive current corresponding to the compensated current command.

Abstract: A rotary damper includes an actuator including an extension side that is connected to a linkage. The rotary damper includes the linkage, a cam follower, and a cam wheel. The linkage is connected to the cam follower and the cam follower is movable relative to the cam wheel. The cam follower contacts a first portion of the cam wheel when in a locked state. The cam follower contacts a second portion of the cam wheel when a rotational force is applied to the cam wheel and the extension side of the actuator extends to apply an actuator force that counteracts a portion of the rotational force.

Abstract: A machine tool 1 has a support body 11, moving bodies 12, 13, 14, 15 with an engagement member 12a having an engagement hole 12b, a guide mechanism 20 for guiding the movement of the moving bodies 12, 13, 14, 15, a guide rail 31 provided along the moving direction of the moving bodies 12, 13, 14, 15 on the support body 11, a moving member 32 having a moving member body 33 engaged with the guide rail 31 and an engagement shaft 34 provided on the moving member body 33 and engaged with the engagement hole 12b and a collar member 35 provided on the tip portion of the engagement shaft 34, and a compressing spring 38 in which the engagement shaft 34 is inserted and which energizes the engagement member 12a. The engagement member 12a is provided on the opposite side to the moving body 14.

Abstract: A machine tool 1 comprises a bed 11, a column 12, a spindle head 15, a spindle 16, a saddle 17, a table 18, a feed mechanism for moving the spindle head 15, the saddle 17 and the table 18 in Z-axis, Y-axis and X-axis directions respectively, a position detector for detecting the positions of the spindle head 15, saddle 17 and table 18, a controller for feedback controlling the feed mechanism, a position detector 51 for detecting the position of the spindle head 15, a position detector 54 for detecting the position of the spindle head 15, a position detector 57 for detecting the position of the table 18, and a measurement frame 50 which is configured with a different member from the bed 11 and the column 12 and on which readers 53, 56, 59 of the position detectors 51, 54, 57 are disposed.

Abstract: Electronic equipment, including a GPS dongle and a PC, compares an acquired current location position of the electronic equipment with an acquired planned installation position of a machine tool to determine whether or not the current location position is within a predetermined range from the planned installation position. Further, the electronic equipment determines, if it is determined that the current location position is within the predetermined range from the planned installation position, whether or not a predetermined condition has been satisfied. The electronic equipment also performs, if it is determined that the predetermined condition has been satisfied, information input processing on the machine tool to remove activation restriction on the machine tool. In this manner, the electronic equipment can prevent illegal removal of activation restriction on the machine tool.

Abstract: There is provided a method of compensating a command value for rotation angle capable of precisely compensating a command value for rotation angle even when conditions at detection differ to thereby make error patterns different in the case where a tooth-to-tooth period error pattern in an arbitrary tooth period is used for all the tooth periods to correct a command value for rotation angle.

Abstract: A machine tool having a turning function and a milling function includes a spindle, a spindle housing supporting the spindle in a rotatable manner, a main clamp provided at the spindle, an auxiliary clamp provided at the spindle housing, and a double arm with a first gripper and a second gripper. The auxiliary clamp clamps a tool holder together with the main clamp during fixing a fixed tool. The double arm exchanges a tool holder grasped at the first gripper for another tool holder grasped at the second gripper by rotating and sliding movements. The auxiliary clamp is arranged at a position not interfering with the double arm that moves during exchanging tool holders. By such a configuration, a machine tool achieving a clamping force sufficient to withstand the load during a turning process, and that allows tool exchange in a short period of time, and a tool holder employed in such a machine tool, can be provided.

Abstract: A machine tool includes a rotatable spindle, a spindle drive, a tool magazine, a tool changer including a rotating shaft, a rotating shaft drive motor, an angular position detector, a tool change arm having gripping units at both ends, and a controller. After interchanging a first tool mounted on the spindle and a second tool held in a tool pot, when rotating the tool change arm to an intermediate position, rotation of the spindle is started as soon as the second tool mounted on the spindle and the gripping unit are out of contact with each other.

Abstract: A machining-related data processing system has a configuration in which a controller for machine tool comprising an NC device and an assisting device is connected to a data processing device via a telecommunication line.

Abstract: In a case where a tool holder 5 having a plurality of cutting tools T are attachably/detachably mounted on a base member 8, the tool holder 5 is formed in a ring shape and has depressions 5a and projections 5b on an inner periphery, and by aligning the depressions and projections 5a, 5b of the tool holder 5 with projections 9b and depressions 9a formed on an outer periphery of a rotating member 9 rotatably mounted on the base member 8, the tool holder 5 is mountable to or removal from the base member 8. The tool holder 5 is clamped to the base member 8 by being pressed against a seating surface 8e of the base member 8.

Abstract: A method, non-transitory computer-readable storage medium, and tool changing system for changing tools on a machine. The tool changing system includes a tool magazine, a tool transporter, and an automatic tool changer (ATC). The ATC includes a tool holder and a tool changer. The tool magazine is configured to store at least one tool received at the tool loading station. The tool transporter is configured to transport a tool from the tool loading station or the tool magazine to a tool transfer position of the ATC, and to hold the tool at the tool transfer position during an automatic tool change process. The tool holder is configured to hold the tool at the tool transfer position during the automatic tool change process when the tool transporter is not positioned at the tool transfer position. The tool changer is configured to provide the tool at the tool transfer position to a tool change position of a machine during the automatic tool change process.

Abstract: A work having a non-circular cross-section is machined by relative movement between the work and a tool, as the relative position and angle between the work and tool are changed at least within a plane including the cross-section of the work. In machining along a preset tool path, the difference between the relative angle at a point on the preset tool path which machining is started and that point on the preset tool path at which machining is finished is calculated. Time needed in machining along the preset tool path is equally divided by a preset number at equal time divisions, and positions on the tool path corresponding to equal time divisions are set as tool path points. When the tool moves through each point, the relative angle is continuously changed an angle corresponding to division of the difference of the relative angles by the preset number of equal time divisions.

Abstract: A relocation detection unit includes: an acceleration sensor adapted to detect acceleration generated in the apparatus, an arithmetic section adapted to obtain a first calculation value by performing Nth-order integration on detected value of the acceleration sensor at a predetermined timing, wherein N is a predetermined positive integer, a correction section adapted to obtain a second calculated value by adding/subtracting a specific value to/from the first calculation value at the predetermined timing, and a detection section adapted to detect that the apparatus has been relocated if the second calculated value exceeds a preset reference value.

Abstract: A machine tool having a turning function and a milling function includes a spindle, a spindle housing supporting the spindle in a rotatable manner, a main clamp provided at the spindle, an auxiliary clamp provided at the spindle housing, and a double arm with a first gripper and a second gripper. The auxiliary clamp clamps a tool holder together with the main clamp during fixing a fixed tool. The double arm exchanges a tool holder grasped at the first gripper for another tool holder grasped at the second gripper by rotating and sliding movements. The auxiliary clamp is arranged at a position not interfering with the double arm that moves during exchanging tool holders. By such a configuration, a machine tool achieving a clamping force sufficient to withstand the load during a turning process, and that allows tool exchange in a short period of time, and a tool holder employed in such a machine tool, can be provided.

Abstract: In a displacement detecting device, an objective lens condenses the outgoing light coming from a light source toward a surface-to-be-measured. The optical path of the reflected light coming from the surface-to-be-measured is separated from the optical path of the outgoing light coming from the light source by a separation optical system. The reflected light passing through the separation optical system is condensed by a collimator lens and has astigmatism generated therein by an astigmatism generator, and the reflected light in such a state is incident on a light receiving section. A position information generator generates the position information of the surface-to-be-measured using a focus error signal obtained based on the amount of light detected by the light receiving section.

Abstract: A numerical control device reads a machining program and causes a machine tool to operate based on the machining program. The numerical control device includes: an acceleration-deceleration determining unit; and a position-command generating unit. The numerical control device is configured to set the acceleration and the deceleration as acceleration-deceleration data when the acceleration and the deceleration satisfy tolerances decided based on actual mechanical dynamic characteristics, and set the tolerances as acceleration-deceleration data when the acceleration and deceleration do not satisfy the tolerances. The position-command generating unit is configured to generate a position command based on the moving command, the acceleration-deceleration data, and the speed at the end of the command route and the superimposition amount subjected to processing by the acceleration-deceleration determining unit.

Abstract: Machine tool systems and methods include methods of synchronizing cutting tools with a workpiece retainer. In some embodiments, the methods and systems provide at least two cutting tools that are synchronized to machine a common surface of a workpiece in a quick and efficient manner. A controller having a single line of code for controlling both cutting tools and the workpiece retainer may be used. The cutting tools may be synchronized such that they engage substantially opposite portions of the workpiece, thereby to reduce resulting forces in the workpiece that may tend to induce workpiece deflection and/or chatter. In other embodiments, a cutting tool is synchronized with a split workpiece holder that may be controlled to induce a compression, tension, or torsion pre-load in the workpiece.

Abstract: A horizontal machining center includes: a table driven in first and second directions (directions indicated by arrows 530p and 530q, respectively) allowing the table to approach and move away from a spindle, respectively; a magazine having a plurality of tool gripping claws; and a coupling mechanism for coupling the table and the magazine together and moving the magazine in one of the first and second directions when the table is driven in the other of the first and second directions. When a tool attached to the spindle is removed from the spindle, the table is driven in the first direction, and when a tool accommodated by the magazine is attached to the spindle, the table is driven in the second direction. A horizontal machining center having a simple structure and prevented from having a bulky structure can thus be accomplished.

Abstract: A machine tool has a cover body with a window, the window including two spaced window plates defining an airtight space therebetween. The space is brought to a pressure other than atmospheric. An indicator is coupled to the cover body and has an indicator portion that is displaced in response to pressure in the space. The indicating portion is visually observable from outside the machine tool, so that the airtightness of the window may be determined by visually observing the position of the indicating portion.