Abstract: A forage harvester represents agricultural implements that include at least one rotating component which is driven through a drive train including a main clutch operable between engaged and disengaged conditions so as to selectively couple and disconnect an output of the implement power source with the rotatable component. A rotation alarm circuit is provided for causing a warning device or devices to be energized in the event that the operator leaves a seat, in which he sits for normal operation, for a predetermined minimum time period while the rotatable component is still rotating, as determined by a rotation sensor. The warning device will remain energized until the rotatable component spins down to a zero speed.

Abstract: A right angle drill (1) includes a motor housing (6) which defines therein a hole (18) for accommodating a motor field system (3), a cut-out (15) formed in the underside of the motor housing (6) from the front end toward the rear of the tool (1), and a light unit (16) slidably fitted in the cut-out (15). The light unit (16) is a plate member having an arcuate cross section so as to define an inwardly curved rear (i.e., inner) surface (16a) along its entire length. The unit's inner surface (16a) conforms to the inner surface of the accommodating hole (18) of the motor housing (6). The light unit (16) additionally includes a protrusion (17) at the front outer surface thereof. Furthermore, the protrusion (17) contains a pair of LEDs (21) for illuminating objects below an output spindle (12) to which a bit can be attached.

Abstract: A positioning aid (1) for a hand tool device (3) driving tool (2), in a working direction (A), with a distance measuring system (4) mounted thereon. The distance measuring system (4) has at least one distance measuring sensor (5) for measuring the distance from the distance measuring sensor (5) to an object (6), along a line of measurement (M, M′, M″), and a computing unit (7) for comparing the measured value with a pre-selected desired value (S) and for producing a signal dependent on the comparison, wherein the line of measurement (M, M′) is oriented at least partially perpendicular to the working direction (A).

Abstract: A cutter tool assembly includes a cutter head having an axial end face with an axially extending recess in the end face. A plurality of cutter blades are carried by and extend axially from the end face of the cutter head. A non-volatile memory device is disposed within the recess and affixed to the cutter head.

Abstract: The invention relates to a boring tool that includes a boring bar having a center axis which at a top portion of the bar is arranged to be connected to a machine tool, and which at a bottom portion of the bar along the center axis is slit into two legs. The two legs can be movable towards or away from each other, such as by means of an adjusting screw, for exact adjustment of the position of the cutting tool with relation to the center axis. The tool is arranged in such a way that a joint through bar is detachably attached to the bottom of each of the legs of the boring bar. This joint through bar extends essentially perpendicular to the slit and center axis, and enables a cutting tool to be provided at the end of the bar. Hereby an especially simple tool is obtained which can be adjusted extremely precisely for fine machining of holes.

Abstract: The present invention relates to a laser positioning system for an aperture-processing machine and is an accessory of an aperture-processing machine. The present invention is a type of laser positioning system for an aperture-processing machine that includes two laser transmission devices each of which emits a beam of light. The two light beams form an angular set up. A common line of intersection is formed at the point of intersection in space. After the two laser transmission devices have been fixed relative to the aperture-processing machine, the common line of intersection formed at the point of intersection of the two light beams mentioned above and the axial line of the main bearing cutter of the aperture-processing machine coincide exactly, thus forming the reference for positioning. In the application of the present invention, adjustment is easy, positioning is rapid and observation is direct with high accuracy and low cost.

Abstract: An apparatus for installing rivets or other fasteners through a workpiece includes an automated machine disposed on one side of the workpiece and a hand-held tool that is manipulated by a single worker located on the opposite side of the workpiece. The automated machine includes an end effector supporting tools such as a drill and a riveter. The automated machine also includes a guide structure adapted to be releasably affixed to the workpiece, and a carriage that travels along the guide structure and supports the end effector so that the end effector can be positioned in various locations along the surface of the workpiece where fasteners are to be installed. The end effector includes an electromagnetic clamping device, and the hand-held tool includes a magnetic clamping block that is attracted by the clamping device to clamp the workpiece therebetween. The end effector generates a positioning signal and the hand-held tool includes a detector for detecting the positioning signal.

Abstract: A power drill housing and chuck rotation indicator arrangement in which the power drill housing is formed of two symmetrical shells abutted against each other, the shells each having a front end terminating in a chuck guard defining a respective semi-circular mouth adapted to receive the chuck assembly of the power drill, keeping the chuck assembly protected within the chuck guards.

Abstract: There is provided an apparatus and method for detecting stuck tools in automated machining operations. When a machining operation on a workpiece is finished, the tools are retracted from the workpiece. Prior to moving the workpiece to another machining operation, a stuck tool detector is moved along a plane of separation between the machine head and the workpiece. If a stuck tool is present, the detector senses the stuck tool and sends an alarm signal of the stuck tool condition so that the operator or controlling microprocessor based system is alerted to the stuck tool. Appropriate actions or repairs can then be carried out.

Abstract: An end effector having a platform and a motor coupled to the platform for driving a drilling member. A motor housing is coupled to the platform and includes a plurality of photogrammetry targets secured thereto. The photogrammetry targets are oriented so as to be readily detectable by a photogrammetry sensor for determining the orientation of the end effector and corresponding drilling member. A pressure foot member and pneumatic cylinders are operably coupled to the platform such that the pneumatic cylinders maintain a constant pressure upon the pressure foot member to provide material clamp up. A depth control device is also provided for accurately controlling the depth of the drilling member and preventing further drilling.

Abstract: A power hand drill outer shell arrangement includes a cover shell, the cover shell having equiangularly spaced peripheral lugs and an integrated switch seat holding a transmission gear box control switch; and a housing abutted against the cover shell, the housing having axially extended mounting holes respectively fastened to the peripheral lugs of the cover shell, and a front opening, which receives the switch seat.

Abstract: Lighting devices are taught for machine tools. The lighting devices may include one or more light emitters controlled by an electric circuit, which can be connected via one or more conductors to the inner circuit of an electric machine tool. The electric circuit may comprise at least one photometer and a controller that automatically controls the illumination level of the light emitters in response to the ambient light intensity detected by the photometer. The present invention also relates to machine tools comprising such lighting devices.

Abstract: A system for aligning the bit of a hand-held tool with the surface of a workpiece wherein a laser beam essentially parallel to the axis of the bit is projected forwardly toward the workpiece and onto a mirror maintained at a preselected angle to the workpiece surface. The incident beam is reflected backwardly onto means detecting both the incident beam and the reflected beam and indicating when the beams are coincident.

Abstract: A plunge-type router is disclosed which has a base and a head assembly that is vertically adjustable by an adjusting mechanism. The plunge router includes an electronic control system with a digital display and control functionality that enables the router to accurately determine a baseline or zero position for a router bit installed in the router and permits the user to input a depth of cut value or other predetermined command. The control system then automatically causes the motorized adjusting mechanism to go to the appropriate position. The electronic control system enables the storage of multiple depth settings as well as multiple step or macro operations. In this regard, macros may be run to provide incremental cutting necessary for performing multiple passes to achieve a relatively deep depth of cut.

Abstract: A hand tool device (1), for an at least partially rotationally driven drill tool (2), comprising an electronic depth stop (3) with a sensor (4) for non-contacting gauging of a distance and a calculator component (5) for calculating the depth (T) of a drill bit tip (8) relative to a reference surface (10), and signaling when a measured value attains a set value (S), whereby the set value (S) can be transmitted into a set value memory (6), using a single manually operated transfer accept actuation means.

Abstract: An end effector having a platform and a motor coupled to the platform for driving a drilling member. A motor housing is coupled to the platform and includes a plurality of photogrammetry targets secured thereto. The photogrammetry targets are oriented so as to be readily detectable by a photogrammetry sensor for determining the orientation of the end effector and corresponding drilling member. A pressure foot member and pneumatic cylinders are operably coupled to the platform such that the pneumatic cylinders maintain a constant pressure upon the pressure foot member to provide material clamp up. A depth control device is also provided for accurately controlling the depth of the drilling member and preventing further drilling.

Abstract: A hand-held power tool, such as a spiral cutting tool, with improved operator control and visibility. The power tool includes a motor contained in a motor housing. The motor may be a variable speed motor controlled by a speed control user interface mounted on the housing. Each time a speed control button is actuated, the motor speed is changed. A display provides the operator of the tool with an indication of the motor speed selected. A detachable handle is provided with a moveable mechanism for easily, quickly, and securely attaching the handle to the housing and removing the handle therefrom with one hand. The detachable handle may include one or more storage compartments formed therein. The detachable handle includes a trigger switch mounted therein for operating the cutting tool motor. The trigger switch is mounted in the detachable handle in a position such that the switch is operated by the little finger and ring finger of an operator's hand.

Abstract: A hand-held power tool having a housing and an open top tray attached thereto is disclosed. The open top tray is oriented generally perpendicular to a handle axis for carrying small magnetic objects therein. Additionally, the tray is provided with a magnetic portion for retaining the small magnetic objects when the handle is inclined from a vertical position. Thus, the present invention allows small magnetic objects such as tool bits, drill bits, and fasteners to be carried on the hand-held power tool for quick and easy access by an operator.

Abstract: The apparatus and method includes a spindle portion which holds a cutting tool. The drill is initially moved forwardly of a pressure foot portion of the apparatus. The pressure foot portion is then moved forwardly along with the spindle and drill to clamp the mechanical assembly. A thrust control arrangement produces a reduction of the thrust on the tool holder such that as the assembly is being clamped, the tool initially contacts the workpiece and then remains stationary while the pressure foot moves forward to complete clamp-up. The positions of the tip of the tool and the surface of the workpiece are recorded and compensation is then made to the apex position of the spindle stroke, using a previously determined reference position of the tool relative to the workpiece.

Abstract: An improved drilling machine and drilling method will allow rapid configuration and calibration. The drilling machine is small, mobile, and possesses extensive computing power to download positions of hole sites and to control the positioning of the end effector. The mini-driller conforms to various jig configurations regardless of the program model or position on the wing. In short, the controller for the mini-driller quickly orients the machine, downloads the hole sites appropriate to the model under construction and determines with accuracy the mini-driller's precise location in relation to the work piece. A graphic user interface allows the operator to read the projected position of the hole sites, as downloaded from the Numeric Control Server, off of the graphic user interface and to make ad hoc corrections to the projected hole sites.

Abstract: An apparatus for securing a first structure to a second structure and performing an operation on the first and second structures. The apparatus includes a frame structure, a plurality of suction cups, a clamp assembly, a conveyance mechanism and a tool. The plurality of suction cups are coupled to the frame structure and are operable in an energized mode for securing the apparatus to the first structure. The clamp assembly is coupled to the frame structure and exerts a clamping force onto the second structure when the suction cups have secured the apparatus to the first structure. The clamping force is of sufficient magnitude to retain the second structure in a predetermined position relative to the first structure. The tool is configured to perform the operation. The conveyance mechanism is coupled to both the frame structure and the tool and enables the tool to be selectively positioned relative to the frame structure. A method for coupling a first structure to a second structure is also provided.

Abstract: A PCB separator includes a machining device for machining work pieces, and a charge couple device attached to the machining device and the tool member for taking pictures of the work piece. A monitor is coupled to the charge couple device for showing the pictures of the work piece. An index generator is coupled to the monitor for generating and sending a cross-shaped index to the monitor, and includes an adjusting knob for adjusting the sizes of the index relative to the work piece, for allowing the work piece to be precisely machined.

Abstract: The present invention has a laser mounted on the casing of the drill such that the laser is in line with the bit and pointing in the reverse direction. This allows the laser to be used to align the drill bit with a mark or hole such that the drill bit is directly in line with the preexisting mark. A bubble level is included to ensure that the drill is held level or plumb when it needs to be level or plumb. A retrofit mount allows the present invention to be used with pre-existing hand held power drills. The mount can be designed to allow the laser to point backward or forward. The retrofit mount locks on to the machined race of a hand held power drill using a metal collar and bolts. An arm extends either back over the body of the drill in the reverse pointing application or up from the collar in the forward pointing application. A small laser is mounted to the arm such that the laser is aligned with the drill bit.

Abstract: A hand-held power tool having a housing and an open top tray attached thereto is disclosed. The open top tray is oriented generally perpendicular to a handle axis for carrying small magnetic objects therein. Additionally, the tray is provided with a magnetic portion for retaining the small magnetic objects when the handle is inclined from a vertical position. Thus, the present invention allows small magnetic objects such as tool bits, drill bits, and fasteners to be carried on the hand-held power tool for quick and easy access by an operator.

Abstract: The present invention relates to a high-speed rotary machine having a main body, a driving device, a locking device, an illuminating device, two tool accommodation members and a number of tools. The driving device contains a through insertion hole which is aligned with two holes at the left and right body portions of the main body for the crank to insert into either side according to the user's habit or the convenience of the work. The main body includes at the top of the inner side of the holding part thereof a press button used for blocking the locking device in order to increase the torsion value of the applied force.

Abstract: A power hand drill has a subsurface object locator for detecting the presence of an object beneath a surface being probed with the locator. The drill has a housing with a flat accessory mounting surface having a pair of attachment tabs. The locator has a locator housing with a flat base and a pair of key hole slots engaged with the tabs for detachably mounting the locator housing to the accessory mounting surface of the drill housing. The locator includes sensing circuitry contained within the locator housing for detecting subsurface objects and has an object indicator mounted to the locator housing and connected to the sensing circuitry for indicating the presence of a subsurface object. A contoured surface on the locator housing provides a handrest for gripping when operating the drill.

Abstract: A device for aligning a hand-held electric drill to a vertical position with respect to a flat workpiece includes a disc-shaped circular housing having a centered axis, upper and lower faces, and a channel centered on the axis in communication with both faces. A gripping feature associated with the channel permits removable attachment of the housing to a rotating component of the drill, such as the drill shaft or drill bit. A light-emitting component within the housing directs a narrow beam of visible light downwardly from the lower face. When the drill is vertically aligned, the beam of light produces a circular path on the workpiece.

Abstract: A power drill housing and chuck rotation indicator arrangement in which the power drill housing is formed of two symmetrical shells abutted against each other, the shells each having a front end terminating in a chuck guard defining a respective semi-circular mouth adapted to receive the chuck assembly of the power drill, keeping the chuck assembly protected within the chuck guards.

Abstract: An optical unit for projecting an image including first and second locating lines for substantially eliminating the introduction of visual parallax error. In one preferred form, the optical unit is incorporated into a machine for performing a forming operation on a workpiece and is operative to project an image of a portion of a scale to a position easily read by the user during machine operation. The optical unit includes a prism portion having a first side disposed adjacent the scale, a second side at an angle to the first side for reflecting the image and a third side through which the projected image may be viewed. The first locating line is disposed on the first side and the second locating line is disposed on the third side such that visual alignment eliminates the introduction of visual parallax error associated with reading a scale.

Abstract: A remotely powered electronic part sensing system is integrated with a chuck of a rotatable device such as a lathe machine for sensing the position of a part after loading of the part onto the lathe. The sensing system includes a detecting sensor arrangement, a transmitter, and an output sensor/receiver. The detecting sensor and transmitter are electrically connected to each other and integrated into the chuck, while the output sensor/receiver is mounted to a support member of the lathe. The output sensor/receiver is directly wired to an electrical power source in a conventional manner, while electrical power for the transmitter and detecting sensor arrangement is generated remotely, i.e., wirelessly, through an inductive coupling arrangement between the transmitter and output sensor/receiver. The transmitter and all sensors are located under the chuck face plate to minimize potential system fail due to contact with coolant and machine chips.

Abstract: Methods for forming fastener holes in the construction of fuselage assemblies. The method utilizes a triple gantry drilling system with upper, left and right side gantries, within which are dedicated robotic deployment arms having an automatic tool change system with drill attachment exchangeable with a plurality of tools. Each gantry is capable of translational movement along three different axis, as well as rotational movement about an axis of rotation and axis of pitch, respectively, such that simultaneous drilling about the fuselage can be achieved. The method further includes the incorporation of a vision system with camera to assist mechanics to view the drilling processes and verify structure position.

Abstract: A tool with a fluid axis wherein the fluid axis is controlled based on reference information from other tool axes, such as positional information relating to other tool axes. The reference information may be directly measured or may be determined from a control program used to control the tool with respect to the other axis or axes. Feedback information from the fluid axis itself, such as fluid pressure of the fluid axis, may also employed as to help determine the reference signal for controlling the fluid axis.

Abstract: A drill jig for installing a lockset in a hanging door with an aperture for the lockset. The drill jig has a plate with a plug on one side dimensioned to fit into the aperture. An array of drill bushings is mounted in the plate aligned with a level on the top edge of the plate. Rubber feet protect the the door from being marred by the plate. The plate is positioned against the door in preparation for drilling holes through the drill bushing into the door. A tool is provided having a tee hook which is inserted through the door aperture from a side of the door opposite the drill jig and temporarily secures the drill jig against the door during the drilling operation.

Abstract: A method and apparatus for controlling the penetration depth of a cutting tool of a numerically controlled machine. A substantially cylindrical collar extends around at least part of the cutting tool with the collar being axially movable with respect to the axis of rotation of the cutting tool. An electronic sensor, secured to a non-rotatable housing of the numerically controlled machine transmits a signal to terminate further penetration of the cutting tool. The sensor is situated adjacent the collar and axially rearward thereof. A locking pin is provided for preventing an axially rearward end of the collar from touching an axially forward end of the electronic sensor when the collar is not being subjected to a force acting in a rearward axial direction. A nose bush for pre-positioning of the collar relative to the cutting tool in the axial direction is advantageously provided.

Abstract: A light-controlled safety switch for an automated press includes an optical transmitter and receiver affixed to the press frame just above the press ram that redirects the light beam from vertical to horizontal. A light beam is directed downward from the transmitter to a 45-degree reflective surface on the ram. A cross-hole, perpendicular to the centerline of the ram, and a second 45-degree opposite-facing reflector opposite to the first reflective surface returns the light beam to the receiver. Thus, an optical path is achieved from the transmitter to the first reflector, through the ram, to the second reflector and then back up to the receiver. The opposing 45-degree reflectors are preferably provided by a 45-degree dished collar with a light-reflective interfacing surface fitted about the ram.

Abstract: The workpiece or pack of printed circuit boards is fitted to a clamping fixture carried by the table and is machined by a machining head; the head and the table being movable with respect to each other along two coordinate X, Y axes. The aligning method includes the steps of providing the pack with two locating holes; fitting the pack to the fixture; determining the distances between the real positions of the holes and two reference positions; and moving the pack on the fixture to eliminate the distances. The aligning device has an optoelectronic sensor carried by the head to determine the real position of each hole; and a number of motors controlled on the basis of the real position of each hole to move a locating member for locating a first pin on the pack, and to move one bar of a pair of bars for clamping the other pin on the pack.

Abstract: Translation means is provided for translating positional movement of the cutting tool [56] of a cutting machine [10] to a digital readout assembly [60] provided for monitoring the relative positions of the workpiece support means [14] and the cutting tool support [55] in a direction parallel to the positional movement. The translation means comprises a reader mounting [31] for mounting the position reader [15] of a digital readout assembly supported by a carrier assembly [16] which carries the reader [15] whereby it may move with the carrier assembly [16] or relative thereto in a direction parallel to the positional movement. Drive means such as a precision push-pull cable drive [20] is provided for translating the positional movement of the cutting tool [56] to movement of the reader mounting [31] relative to the carrier assembly [16].

Abstract: In a machine tool having a workpiece support table and a tool head assembly provided with a tool engageable in a cutting relation with a workpiece positioned on the table for removing particulate material from the workpiece, a system for monitoring the cutting operation of the tool includes a support assembly, a camera for producing video signals representative of the cutting operation of the tool, the camera being mounted on the support assembly such that its focus is on said tool and a cut made thereby, and a machine controller coupled to the machine tool for controlling its operation. The machine controller includes a video monitor connected to the camera for receiving and displaying the video signals representative of the cutting operation of the tool while simultaneously displaying program information.

Abstract: The invention is a revolving pilot tool. The inventor's revolving pilot has a cylindrical shank which is attached to the tool usually in the center of the bottom of the tool. This shank has a threaded opening in its center. Over the shank is placed a cylindrical bearing. Over this bearing is placed another cylindrical piece that forms the outer surface of the pilot. To hold the bearing and the cylindrical piece upon the shank a screw and o-ring is usually used. This pilot is usually attached to the bottom of the tool to align the tool to an already drilled opening. However, it could be attached above a drill to align the tool to an opening being drilled. The pilot can also align the tool during line boring.

Abstract: A tool bit for working in a previously drilled blind bore (5) has a shank section (2) insertible into the blind bore and a chuck section (1) extending co-axially from a drilling end of the shank section. A marking member (15) facing toward the base of the blind bore is mounted on the shank section (2) so that it rotates with the shank section.

Abstract: A laser light barrier system for measuring or checking tools or workpieces on machine tools has a support which can be fastened to the machine frame. The support has an elongate base housing and two block housings, which at a mutual longitudinal distance project transversely from the elongate base housing and one of which contains a transmitter and one a receiver. The laser beam extends at a distance from and approximately parallel to the elongate base housing. An elongate stop element which is held in position by means of a latching arrangement, extends, in the space between the laser beam and the base housing, in the longitudinal direction from one block housing to the other block housing, and wherein the elongate stop element snaps off in the event of a collision with a moving tool or workpiece and, as a result, actuates an electric switch which, by acting on the emergency stop device of the machine stops the latter.

Abstract: A router and other cutting tools with a fixed center such as drills, shapers, milling machines, etc., used for cutting wood, metal or other materials, is provided with a fence mechanism for either a table or the base of a portable tool, for rapid and easy settings of the fence with respect to the center of the cutting tool. This is accomplished by a pivot mounting of the fence on a table or on a portable tool base, with respect to a block pivoted to the table or tool base, wherein the center of the pivot for the block and the center for the pivot for the fence are on opposite sides of the cutting tool and located on a line which passes through the tool center and the respective pivot locations. The desired spacing of the fence to the tool can be achieved using accurate spacers between the fence and the block, even with the tool being mounted in place.

Abstract: A rough boring tool is composed of a boring rod having a tool hole which is provided with a base line and a plurality of reading scales. The rough boring tool is further composed of a boring tool engaged with the tool hole and provided with a plurality of measuring scales corresponding in location to the reading scales and forming an angle with the base line. The advancement quantity of the boring tool can be easily observed with the naked eye by converging the reading scales of the tool hole of the boring rod and the measuring scales of the boring tool.

Abstract: A integral lighting assembly on an electric power drill. The lighting assembly is powered by the same electrical power source which drives the drill. The lighting assembly provides improved illumination of working or drilling surfaces. The lighting assembly is mounted on a housing that is movable between open and closed positions to turn a light on and off, respectively.

Abstract: A drill jig for installing a lockset in a hanging door with an aperture for the lockset. The drill jig has a plate with a plug on one side dimensioned to fit into the aperture. An array of drill bushings is mounted in the plate aligned with a level on the top edge of the plate. Rubber feet protect the the door from being marred by the plate. The plate is positioned against the door in preparation for drilling holes through the drill bushing into the door.

Abstract: A laser arbor is provided that will display a cutting line on a work piece to be cut by a rotary saw. The laser is operated by a centrifugal switch mounted within the laser arbor along with a laser diode or the like and a battery. Because of the rotation of the laser with the blade and the persistence of the human eye, the moving light spot from the laser appears as a single line, hence it is not necessary as in the prior art to produce light divergence in the plane parallel to the blade plane. For that purpose, it is preferable to employ a light source having a wavelength that lies in a region to which the eye is sensitive, which in practice will typically mean a wavelength in the upper region of the red. Placement of the laser inwardly from the cutting surface of the blade eliminates the danger of any damage occurring to the laser as a result of debris from the cutting process.

Abstract: A tool detection system combines a sensor nozzle with an ultrasonic transducer capable of propagating and detecting ultrasonic waves. A wave is propagated in a coolant fluid stream directed at a tool to be monitored. A control unit powers the ultrasonic transducer and contains circuits for analyzing the ultrasonic waves detected by the ultrasonic transducer. The control compares the actual time between the propagation of an ultrasonic wave and detection of an echo wave reflected from the tool, to an expected time. An alarm is generated when the tool is not present as indicated by the actual time exceeding the expected time. An alarm signal generated by the alarm generator either stops the tool or signals an operator that the tool is absent.

Abstract: An optical unit for projecting an image including first and second locating lines for substantially eliminating the introduction of visual parallax error. In one preferred form, the optical unit is incorporated into a machine for performing a forming operation on a workpiece and is operative to project an image of a portion of a scale to a position easily read by the user during machine operation. The optical unit includes a prism portion having a first side disposed adjacent the scale, a second side at an angle to the first side for reflecting the image and a third side through which the projected image may be viewed. The first locating line is disposed on the first side and the second locating line is disposed on the third side such that visual alignment eliminates the introduction of visual parallax error associated with reading a scale.

Abstract: In a preferred embodiment the core drilling rig of the present invention includes a base, a vertically extending mast, a movable carriage mounted on the mast, an electric powered motor for rotatably driving a core drill bit, and a control system for controlling the supply of electric power to the drive motor. The control system includes a motion sensitive device for detecting the unwanted movement of the base and suspending the supply of electric power to the motor.

Abstract: A drill incorporates an axial feed drive, measuring system for determining the feed distance, a computer for controlling the axial feed drive as a function of the axial feed distance and a rotary drive for driving the tool spindle with pre-established on-load speed or pre-established torque or load moment. The flow or feed of cutting lubricant to the tool is controlled as a function of the pre-established on-load speed or the combination of the pre-established load moment, and the axial feed.