Abstract: A drive-in tool for driving fasteners into a workpiece, wherein the tool comprises in particular: a safety device for transferring the drive-in tool from a trip-ready state into a secured state after expiry of a delay, wherein the safety device comprises a control volume and an activation element, wherein in the first position of the activation element a charging connection is defined between the control volume and the gas pressure source connection, and wherein in the second position of the activation element a discharging connection is defined between the control volume and a pressure sink, wherein one connection from the charging connection and the discharging connection comprises a smallest cross-sectional flow area which, together with a gas pressure of the gas pressure source, determines the delay time of the safety device. The present disclosure also relates to a corresponding method for operating a drive-in tool.

Abstract: A modification system for the modification of elongated pieces of stock may include a powered tool for modifying, or altering the piece of elongated stock, and a support device for supporting a position of the elongated stock relative to the powered tool. An arrangement of the components of the powered tool may provide for ergonomic balance of the powered tool. The support device may include a clamping device that clamps, or holds the elongated stock, and an adjustment device that adjusts a position of the clamping device based on a size of the elongated stock. The support device may include a latching device that maintains the position of the clamping device relative to the stock. A reaction arm may inhibit rotation of the tool relative to the stock during operation. A biasing device may provide for application of an axial biasing force on the stock, to initiate operation.

Abstract: A manual machine tool having a drive motor, a gearbox and a tool holder, wherein a motor drive of the drive motor with a gearbox drive of the gearbox and a gearbox of the drive that is rotatable about an axis of rotation are coupled to the tool holder in a manner which permits rotation, wherein the gearbox has a first switching gear element and a second switching gear element, which can be adjusted in a linear manner by means of an actuating device in each case between a first setting position and a second setting position relative to the gearbox housing, wherein the actuating device is coupled to the switching gear elements and has an actuating part which is pivotably mounted relative to a machine housing of the manual machine tool about an actuating pivot axis and can be actuated manually by an operator of the manual machine tool, wherein the first switching gear element can be adjusted in a linear manner along its setting axis by means of a pivot movement of the actuating part about the actuating pivot axi

Abstract: An electric power tool is configured to rotate an attachment about a Z-axis. The electric power tool includes a three-axes acceleration sensor and an acceleration detection circuit. The acceleration detection circuit calculates an angular acceleration about the Z-axis based on an input signal from the three-axes acceleration sensor. The acceleration detection circuit calculates a change in an angular velocity based on integrating the angular acceleration for a most recent period. The acceleration detection circuit determines a Z-axis angular velocity about the Z-axis, without adding a previous change in the angular velocity from before the most recent period, as equal to the change in angular velocity. The acceleration detection circuit detects a twisted-motion of the electric power tool based on the Z-axis angular velocity.

Abstract: Method for generating a machining program of a plunge mulling machine tool, comprising the steps of: establishing a machining to be performed on a workpiece; acquiring first machining information that indicates stable cut conditions of the machine tool for the workpiece; acquiring second machining information that indicates engagement cut conditions of the machine tool during the machining on the workpiece; carrying out a determination of the rotation speeds of the machine tool during the machining on the basis of the second machining information and the first machining information; wherein the machining program is generated on the basis of the determination carried out.

Abstract: A position controlling device for a carpenter angle drill/hollow chisel mortiser has a mounting group, a positioning group, and a retaining arm. The mounting group has two crossbars and a bridge bar. The bridge bar is connected to the crossbars. The positioning group is connected to the mounting group, and has two limiting blocks, a holding frame, and a circuit breaker. The limiting blocks are connected to the bridge bar between the crossbars. The holding frame is securely connected to one of the limiting blocks. The circuit breaker is mounted in the holding frame and has a contacting slice and an electric wire. The contacting slice is elastically connected to the circuit breaker, and transversally extends out of the holding frame. The retaining arm selectively abuts the contacting slice of the circuit breaker to enable the circuit breaker at a turn-off condition.

Abstract: Provided is a power tool which is capable of more reliably detecting excessive reaction torque acting on a tool body. More specifically, provided is a handheld power tool which causes a tip tool to rotate so as to carry out a predetermined machining operation, the handheld power tool comprising a tool body, a motor which is housed in the tool body and causes the tip tool to rotate, a first sensor which detects the torque state of the tip tool, a second sensor which detects the motion state of the tool body, and a torque cut-off mechanism which cuts off the transmission of torque between the motor and the tip tool. The torque cut-off mechanism is configured to cut off the transmission of torque on the condition that the first sensor and the second sensor respectively detect a preset threshold value for the first sensor and the second sensor.

Abstract: A workpiece is machined by setting a frequency response band of a control system for a rotation drive motor or a feed drive motor so that tool abrasion is within a predetermined allowable range. The frequency response band may be adjusted by adjusting a proportional gain and an integral gain. With the workpiece machined by such a process, where the frequency response band maintains tool abrasion within the allowable range, machining quality and efficiency are improved.

Abstract: A hand-held power tool guiding device and method is disclosed. The device includes a receptacle element for receiving the power tool, a remote control device for operating the power tool, and a transmission device for transmitting the movement of the remote control device to the power tool. The transmission device has a switch actuator and a connecting element, where the switch actuator is adjustable into a standby position during insertion of the power tool into the receptacle element.

Abstract: A device is described for generating a control signal for controlling a passenger protection arrangement of a motor vehicle, having a first acceleration sensor for generating a first acceleration signal, having a second acceleration sensor for generating a second acceleration signal, having a first structure-borne noise sensor for generating a first structure-borne noise signal, having a second structure-borne noise sensor for generating a second structure-borne noise signal, and having an evaluation circuit, the evaluation circuit (being configured for generating a combination signal from the first structure-borne noise signal and the second structure-borne noise signal, the evaluation circuit being configured for generating the control signal as a function of the first acceleration signal, the second acceleration signal and the combination signal.

Abstract: A tapping machine (1) executes a tapping operation by operating a spindle motor (21) and a feed axis motor (31) in synchronization, and includes a spindle reversal detector unit (34) for detecting the reversed operation of the spindle during the tapping operation, and a reverse correction amount production unit (35) for producing a reverse correction amount for improving follow-up performance of reversed operation of the feed axis at the time when the reversed operation of the spindle is detected by the spindle reversal detector unit (34). When the reversed operation is detected by the spindle reversal detector unit, the reverse correction amount produced by the reverse correction amount production unit (35) is added to the speed instruction on a speed control loop of the feed axis control unit (30) or to an integrator (41) of the speed control loop.

Abstract: A power tool includes a housing, a motor, an output member driven by the motor, and a reaming attachment coupled to the output member. The reaming attachment has a front end portion selectively driven in rotation by the output member to drive a fastener into a workpiece, and a reaming portion selectively driven in rotation by the output member to remove material from an end surface of a conduit. A rotational motion sensor in the housing is operable to detect rotational motion of the housing about an axis. A controller receives a signal indicative of rotational motion from the sensor, determines a direction of the rotational motion of the housing, and drives the motor in a direction corresponding to the direction of rotational motion of the housing.

Abstract: A drilling machine, in particular a core hole drilling machine, having a mount on which an electromagnet is provided for attachment to a metal part on which a drilling unit is supported in displaceable fashion, wherein the drilling unit has a housing that accommodates an electric motor for driving a tool, is provided. There is provided a controller having at least one switch for switching on and off the electric motor and the electromagnet. The controller includes an operating and supervisory panel that is supported on an end of the housing opposite the tool. The switch for switching on and off the electromagnet and for switching off the electric motor is designed so that in the activated condition of the electric motor any operation of the controller will first cause the electric motor to be switched off before the electromagnet can be switched off.

Abstract: A surgical instrument is provided for cutting bone and other tissue. The instrument includes a housing. A plurality of sensors is located in the housing in a spaced apart orientation from each other. A collar is moveably mounted to the housing into a plurality of different collar orientations on the housing. A lever comprising an actuator is moveably coupled to the collar and, with the collar located in any one of the plurality of different collar orientations, the lever is operable to move the actuator relative to one of the plurality of sensors in order to vary a signal produced by that sensor.

Abstract: The present invention provides a method of drilling a hole in a workpiece in order to control breakthrough of the workpiece comprising the steps of: a) initiating contact between a drill bit of a drill unit and the workpiece; b) operating the drill unit to rotate the drill bit to drill the workpiece; c) during drilling of the workpiece measuring the force, F and torque, T, experienced by the drill bit; d) calculating a variable F?, based on the measured force, F, representing the rate of change of F; e) calculating a variable, T? based on the measured torque, T, representing the rate of change of T; f) calculating a variable F? representing the rate of change of F?; g) calculating a variable T? representing the rate of change of T?; h) detecting the onset of breakout of the workpiece by use of the variables F?, F?, T? and T?; i) thereby controlling the speed of rotation of the drill bit during breakthrough of the workpiece to control the degree of breakout of the drill bit from the workpiece.

Abstract: A tool chuck may include a chuck body defining a longitudinal axis. A sleeve may be mounted on the chuck body for movement between a first axial position and a second axial position. A clutch part provided on the sleeve. The clutch part may engage with a cooperating clutch part when the sleeve is in the second axial position. The clutch part may have a working surface that faces in a direction perpendicular to the longitudinal axis.

Abstract: The present invention describes a machine to that includes a casing and a toolholder spindle. The machine tool further includes a drive mechanism that drives the toolholder spindle. The drive mechanism includes first and second drive members. The first drive member rotates the spindle about its axis. The second drive member translates the spindle and is screwed onto the spindle in such a way that the spindle advances or reverses as a function of the relative speed of rotation between the first and second drive members. The machine tool also includes a first motor and a second motor. The first motor rotates the first drive member and the second motor rotates the second drive member. The machine too further includes a control unit that controls and adjusts the speed of rotation of the first motor and the second motor independently.

Abstract: The invention relates to a tool having a tool element which rotates in operation with at least one geometrically defined blade, in particular a material cutting tool element. The tool element is subject to an operating parameter in the operating condition. A measuring device is provided for determination and conversion of the operation parameter into a measured signal. A first measuring device cooperates with a first tool element in the operating condition such that essentially only a first operating parameter for the first tool element may be recorded by the first measuring device.

Abstract: A tapping machine (1) executes a tapping operation by operating a spindle motor (21) and a feed axis motor (31) in synchronization, and includes a spindle reversal detector unit (34) for detecting the reversed operation of the spindle during the tapping operation, and a reverse correction amount production unit (35) for producing a reverse correction amount for improving follow-up performance of reversed operation of the feed axis at the time when the reversed operation of the spindle is detected by the spindle reversal detector unit (34). When the reversed operation is detected by the spindle reversal detector unit, the reverse correction amount produced by the reverse correction amount production unit (35) is added to the speed instruction on a speed control loop of the feed axis control unit (30) or to an integrator (41) of the speed control loop.

Abstract: The invention relates to a method for optimizing vibration of a machine tool, in which a driven shaft is rotated, in which a speed range is subsequently passed through, wherein the vibrations occurring in said speed range are sensed and wherein an optimum speed having a minimized vibration is determined and adjusted.

Abstract: An apparatus for a drilling operation. In one advantageous embodiment, the drilling operation includes a motor, a rotary sensor, and a controller connected to the rotary sensor. The rotary sensor may be capable of generating a signal in response to rotary movement of the drill motor. The controller may be capable of monitoring a speed of the air motor from the signal generated by the rotary sensor and may be capable of identifying a change from a current layer in a stackup to a new layer in the stackup using the signal.

Abstract: A machine tool which processes a machine target object using a main shaft which revolves, the machine tool includes a support portion which supports the main shaft; a first driving unit which revolves the main shaft about a first axis; a second driving part which feeds the main shaft from the support portion in a direction of the first axis; a control part which changes an upper limit value of a revolution speed of the main shaft according to a feeding length of the main shaft fed from the support portion; and a memory unit which associates and stores the upper limit value of the revolution speed and the feeding length.

Abstract: Systems and methods for detecting a material interface between two dissimilar materials in intimate contact with one another include a detection circuit to detect the interface via changes in electrical conditions in the circuit during a drilling operation.

Abstract: A surgical instrument is provided for cutting bone and other tissue. The instrument includes a housing. A plurality of sensors are located in the housing in a spaced apart orientation from each other. A collar is moveably mounted to the housing into a plurality of different collar orientations on the housing. A lever comprising an actuator is moveably coupled to the collar and, with the collar located in any one of the plurality of different collar orientations, the lever is operable to move the actuator relative to one of the plurality of sensors in order to vary a signal produced by that sensor.

Abstract: The invention refers to a working machine with a machining tool which can be set in a spindle head of a working spindle. A monitoring unit is provided which monitors the shape of the spindle head.

Abstract: The invention relates to a method for assembling sheets by riveting, comprising a step for piercing a hole through the sheets, followed by a step for placing a rivet in the pierced hole, the step for piercing a hole being executed by supplying an advance speed instruction of a piercing tool as well as a rotation speed instruction of this tool. According to the invention, a previous step for determining information on the local stiffness of the sheets (Info_stiffness) is also carried out at the level of the hole to be pierced, the advance speed instruction and rotation speed instruction of the tool being a function of this information on the local stiffness of the sheets. Application most suited to the field of aircraft construction.

Abstract: A device for the high-speed drilling of boards for printed circuits and the like. The device has a support, a drill head with an associated mandrel, and a member for locking and driving a drill bit in the mandrel. The mandrel is actuated by a compressed air turbine and has an optical encoder for encoding the speed of rotation of the turbine and generating a signal representing this speed. The signal is supplied to a control circuit in order to drive a proportional valve supplying compressed air to the turbine as a function of the speed of rotation encoded by the optical encoder.

Abstract: An apparatus, system, and method are disclosed for retracting a drill bit relative to a drill. In one embodiment, the apparatus includes a driving device within the drill, a drill bit coupleable to the driving device, a first engaging element coupled to the drill bit, a sensor in communication with the driving device, and a second engaging element coupled to the drill. The drill bit is rotatably drivable by the driving device. The sensor detects a change in a speed of the drill bit. The second engaging element engages with the first engaging element in response to the sensor detecting a change in the speed of the drill bit. The drill bit retracts relative to the drill in response to engagement between the second engaging element and the first engaging element.

Abstract: Method and system for producing holes of various dimensions and configurations in a workpiece (42) using a portable orbital drilling machine (44), wherein said workpiece has attached thereto a template (10) with preformed guide holes (12-40) located in a pattern corresponding to the positions of the holes to be formed in the workpiece. Each guide hole (12-40) is provided with a readable information carrier (12i-40i) containing an identification of the respective guide hole. When fixating the drilling machine (44) in a guide hole, the latter is identified by a hole database (48) by sensing the respective information carrier. A control unit (50) associated with the hole database (48) controls the drilling machine (44) to perform a relevant hole-cutting process in the workpiece.

Abstract: A drill has a housing, a drivable drill spindle rotatably mounted in the housing, a chuck body coaxially connected and rotationally fixed to the drill spindle, a tightening sleeve rotatable on and relative to the chuck body, and jaws moveable relative to the chuck body by the tightening sleeve. A coupling between the housing and the tightening sleeve has a sleeve held on the housing so as not to rotate with the chuck body and movable relative to the chuck body chuck between a coupling position in which it connects the tightening sleeve to the spindle housing angularly in a friction-fit manner and a decoupling position into which it is urged by a decoupling spring when torque between the tightening sleeve and the coupling sleeve in the coupling position exceeds a predetermined value.

Abstract: A drilling machine is provided for breaking chips formed by drilling action into manageable lengths. The drilling machine comprises a first gear having a first axis of rotation, and a cam follower surface. It has a second gear having a second axis of rotation coincident with the first axis of rotation. A housing is provided configured to support the first gear and the second gear, the housing having a cam surface, a spring and a tool holder spindle having a third axis of rotation. The first and second gears are configured to impart both a linear feed and a rotation to the spindle. The first and second axes of rotation are coincident with the third axis of rotation such that the cam surface is urged into contact with the cam follower surface by the spring. The cam surface and the follower surface are shaped such that when the first gear rotates, the first gear is caused repeatedly to retract and then to advance, breaking chips that are formed.

Abstract: The present invention provides a method of drilling a hole in a workpiece in order to control breakthrough of the workpiece comprising the steps of: a) initiating contact between a drill bit of a drill unit and the workpiece; b) operating the drill unit to rotate the drill bit to drill the workpiece; c) during drilling of the workpiece measuring the force, F and torque, T, experienced by the drill bit; d) calculating a variable F?, based on the measured force, F, representing the rate of change of F; e) calculating a variable, T? based on the measured torque, T, representing the rate of change of T; f) calculating a variable F? representing the rate of change of F?; g) calculating a variable T? representing the rate of change of T?; h) detecting the onset of breakout of the workpiece by use of the variables F?, F?, T? and T?; i) thereby controlling the speed of rotation of the drill bit during breakthrough of the workpiece to control the degree of breakout of the drill bit from the workpiece.

Abstract: A non-pneumatic system for use with a workpiece is described. A clamp assembly having a clamp pad is secured to the cabinet. An electrically operated tool is movably secured to the cabinet. The tool has a remote switch which when activated in turn activates the tool. A lever (e.g., a handle) is operatively coupled to the clamp assembly and the tool. When the lever is manually moved, the remote switch is activated and the clamp pad moves towards the work surface. Preferably, the tool also moves towards the work surface opening by manually moving the lever. For example, the tool utilized in this non-pneumatic system may be a drill or saw.

Abstract: An apparatus comprises a machine module and an instrument module. The machine module is capable of being connected to a power tool. The instrument module is capable of being connected to the machine module and capable of generating a number of signals containing information about a number of operating conditions during operation of the power tool.

Abstract: Accessories for power tools and combinations are provided. An accessory for a power tool may include a body including a connecting portion for connecting the accessory to the power tool and a communication member positioned on the body for communicating with the power tool. The accessory may be capable of communicating with a power tool and an inventory system via the communication member. A combination may include a power tool including a housing and a motor supported by the housing, and a power tool accessory connectable to the power tool and driveable by the motor, the power tool accessory may communicate with the power tool for affecting operation of the power tool. A combination may include an indication device operable to indicate operation characteristics of the power tool to a user. The communication member may be operable to communicate with the indication device.

Abstract: A tool chuck may include a chuck body defining a longitudinal axis. A sleeve may be mounted on the chuck body and axially fixed relative to the chuck body. A clutch part may be provided on the sleeve. The clutch part may interact with a cooperating clutch part mounted on the power driver housing. The cooperating clutch part may be mounted on the power driver housing for movement between a first axial position in which the chuck body is rotatable together with the sleeve, and a second axial position in which the chuck body is rotatable relative to the sleeve to actuate the tool chuck. The chuck body may be rotatable in a first direction to actuate the tool chuck up to a first torque threshold, and rotatable in a second direction to actuate the tool chuck up to a second, different torque threshold.

Abstract: A power driver may include a motor that rotates upon receiving an input current. A tool chuck may have chuck jaws to hold an accessory. The tool chuck may be coupled to the motor. A power take off mechanism may be connected between the motor and the tool chuck. The power take off mechanism may be adjustable into a CHUCK MODE to one of open and close the chuck jaws while the motor rotates. An electronic clutch may interrupt the input current to the motor if the power take off mechanism is in the CHUCK MODE and if the input current exceeds a trip value.

Abstract: A computer implemented method, apparatus, and computer usable program code for performing a drilling operation. The drilling apparatus comprises a housing, a spindle, a spindle motor, a thrust motor, a load sensor, and a controller. The spindle may be capable of receiving a drill bit. The spindle motor may be capable of turning the spindle at a set of different speeds during the drilling operation. The thrust motor may be capable of moving the spindle in an axial direction. The load sensor may be capable of detecting a reaction thrust force during the drilling operation to form a detected reaction thrust force. The controller may be capable of controlling the spindle motor and the thrust motor to change a drilling speed in response to changes in the detected reaction thrust force.

Abstract: A compact drilling system capable of improving working efficiency. The drilling system includes a drilling machine and a compressor. A control circuit controls performances of a drill motor in the drilling machine and an air compression motor in the compressor based on the detection result of a pressure sensor that detects a pressure within an air tank provided in the compressor. When one of the motors is activated, the other motor is not allowed to be operated and only when the drill motor is activated, compressed air is supplied from the air tank to the drilling machine. An electrical socket is provided in the compressor. A power cord extending from the drilling machine can be connected to the socket.

Abstract: A device for the high-speed drilling of boards for printed circuits and the like comprising a support (2), a drill head (11) with associated mandrel (12), and a device for locking and driving a bit (13) in the mandrel, wherein the mandrel is actuated by a compressed air turbine (33) and comprises means (40) for encoding the speed of rotation of the turbine adapted to generate a signal representing this speed, this signal being supplied to a control circuit (61) in order to drive a proportional valve (62) disposed in the circuit supplying compressed air to the turbine as a function of the speed of rotation encoded by the encoder means (40).

Abstract: A multi-speed drill includes a housing with a motor including an output member. A constant mesh parallel axis transmission can be disposed in the housing and can include a high speed and low speed gears. A clutch member can be associated with the low speed gear. A conical spring can bias the low speed gear and the clutch member together for torque transfer up to a predetermined torque level. Above the predetermined level, cam surfaces between the low speed gear and the clutch member move them apart, thereby limiting torque transfer to the output spindle. In the high speed mode the torque transfer between the input pinion and the output spindle bypasses the clutch member. The maximum torque level capable of being generated at the output spindle in the high speed mode can be less than the predetermined torque level.

Abstract: A drilling machine is provided for breaking chips formed by drilling action into manageable lengths. The drilling machine comprises a first gear having a first axis of rotation, and a cam follower surface. It has a second gear having a second axis of rotation coincident with the first axis of rotation. A housing is provided configured to support the first gear and the second gear, the housing having a cam surface, a spring and a tool holder spindle having a third axis of rotation. The first and second gears are configured to impart both a linear feed and a rotation to the spindle. The first and second axes of rotation are coincident with the third axis of rotation such that the cam surface is urged into contact with the cam follower surface by the spring. The cam surface and the follower surface are shaped such that when the first gear rotates, the first gear is caused repeatedly to retract and then to advance, breaking chips that are formed.

Abstract: A deep-hole drilling apparatus capable of preventing a tool mark from growing is provided. The deep-hole drilling apparatus provided for this purpose comprises: a tool (12) that is rotationally driven to drill a deep hole (Wa) in a work (W); an acceleration meter (19) that detects vibration of the tool (12) as the acceleration during deep hole processing; a monitoring apparatus (20) which performs frequency analysis on the acceleration detected by the acceleration meter (19) and which determines that a tool mark is produced in the deep hole (Wa) when the overall value of the whirling frequency and the bending natural frequency within a frequency range not including the torsional natural frequency on torsional vibration, constantly produced during the deep hole processing, exceeds a predetermined threshold (?); and an NC apparatus (18) that controls both revolution and feeding speed of the tool (12) on the basis of the determination made by the monitoring apparatus (20).

Abstract: A chuck assembly configured to provide a shorter longitudinal profile. The chuck assembly includes a chuck body with a support bearing mounted to a rear portion of the chuck body and mounted to a portion of a housing such that a cavity is defined axially rearward of the support bearing and is configured to receive the jaws when the rear portion of the jaws extend axially rearward. The chuck assembly can be incorporated into a tool driven by a motor. In some aspects, the tool may include a speed change mechanism, a torque adjustment mechanism, or both.

Abstract: The orientation of a machine 2 relative to a work-piece 10 is manually controlled by means of an alignment device 4. The device 4 includes a light source 24 rigidly attached to a foot 12 that is resiliently movably attached to the main body 18 of the device. The body 18 of the device 4 houses a light detector 26 for detecting a light beam from the light source 24, the position of the region on the detector 26 illuminated by the beam depending on the orientation of the machine 2 relative to the work-piece 10. The operator is provided with feedback on whether the machine 2 is correctly aligned with a target orientation (usually perpendicular to the surface) and concerning the direction of corrective movement required, if any.

Abstract: A tool attachable to a spindle of a machine tool in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., giving a higher rotational speed than that of the spindle of the machine tool without supplying electric power from the outside, and able to be changed automatically, provided with a machining tool for machining a workpiece, a motor for driving the machining tool, a generator for generating electric power to drive the motor by the rotation of the spindle, a rotational speed detecting device for detecting the rotational speed of the motor, and a rotational speed display for displaying the rotational speed detected by the rotational speed detecting device so as to be visually recognized from the outside of the attachable tool.

Abstract: A pneumatic drilling machine is provided, comprising a pneumatic motor, a circuit for connecting the motor to a source of compressed air, a tool holder spindle, and a drive mechanism. The drive mechanism comprises a coupling shaft which can be moved to select a first mode of driving the spindle and a second method of driving the spindle. The mechanism has a driving cycle which comprises a stationary mode at the beginning and end of the cycle, and at least one phase for driving the spindle according to the first driving method, then a phase for driving the spindle according to the second driving method, then the stopping of the supply of air to the motor. A supply valve of the circuit is controlled pneumatically by the drive mechanism to interrupt the supply of compressed air to the motor at the end of the driving cycle.

Abstract: Apparatus and methods for servo-controlled manufacturing operations are disclosed. In one embodiment, an apparatus includes a base member, a drive platform spaced apart from the base member by a separation distance, and a plurality of guide members extending between the drive platform and the base member. At least one of the drive platform and the base member are moveable along the guide members to increase or decrease the separation distance. The apparatus also includes a drive member operatively coupled between the drive platform and the base member, and a servo motor operatively coupled to the drive member. As the servo motor drives the drive member, the separation distance is varied. In an alternate embodiment, a manufacturing tool may be coupled to at least one of the drive platform and the base member.

Abstract: A tool attachable to a spindle of a machine tool in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., giving a higher rotational speed than that of the spindle of the machine tool without supplying electric power from the outside, and able to be changed automatically, provided with a machining tool for machining a workpiece, a motor for driving the machining tool, a generator for generating electric power to drive the motor by the rotation of the spindle, and a rotational speed detecting device for detecting the rotational speed of the motor based on a received light signal.

Abstract: A pneumatic drilling machine is provided, comprising a pneumatic motor, a circuit for connecting the motor to a source of compressed air, a tool holder spindle, and a drive mechanism. The drive mechanism comprises a coupling shaft which can be moved to select a first mode of driving the spindle and a second method of driving the spindle. The mechanism has a driving cycle which comprises a stationary mode at the beginning and end of the cycle, and at least one phase for driving the spindle according to the first driving method, then a phase for driving the spindle according to the second driving method, then the stopping of the supply of air to the motor. A supply valve of the circuit is controlled pneumatically by the drive mechanism to interrupt the supply of compressed air to the motor at the end of the driving cycle.