Abstract: A drilling apparatus and control method is disclosed. An auxiliary device can be connected to a drilling machine. The auxiliary device includes a camera aligned in a working direction for recording an image of a working surface and a drill hole generated by the drilling machine. An image processing device is provided for identifying the drill hole in the image. Based on a distance from the drill hole to a reference point in the image, an evaluation device determines a distance from the drilling machine to the workpiece. A display device serves to indicate the determined distance.

Abstract: An accessory that can be connected to a machine drill is provided. A projector is provided to project a first light spot and a second light spot to a work piece to be processed. A camera is provided to record the first light spot and the second light spot in an image. A processing device is provided to determine an incline of the machine drill in reference to the work piece, based on a first distance of the first light spot from a reference point recorded in the image and a second distance of the second light spot from the reference point recorded in the image. A display device is coupled to the processing device and displays the determined incline. The light spots may be embodied punctual or planar.

Abstract: An accessory is provided that can be connected to a power drill or can be fastened at the power drill in a detachable fashion. The accessory may comprise detachable or fixed means for fastening at the power drill, e.g., clips, sleeves, clamps, screws. A measuring device is provided to determine measurements, including an incline of the power drill in reference to an operating surface and/or a distance of the power drill from the operating surface. A projector is provided to project the symbols according to the measurements determined to the operating surface.

Abstract: According to one aspect of the application, a device for driving a fastening element into a substrate has an energy-transfer element for transferring energy to the fastening element. The energy-transfer element can move preferably between a starting position and a setting position, wherein the energy-transfer element is located, before a driving-in procedure, in the starting position and, after the driving-in procedure, in the setting position. According to another aspect of the application, the device comprises a mechanical-energy storage device for storing mechanical energy. The energy-transfer element is then suitable preferably for transferring energy from the mechanical-energy storage device to the fastening element.

Abstract: A hand-held electric power tool has a hand-held outer housing (23), an electric motor (1) with a fan (3) for generating a flow (4) of cooling air, and an electronics module (2) having an electronic motor control (2a) and a computing element (2b) for monitoring the motor temperature and including a motor temperature model (11), and a temperature sensor (5) arranged directly at the electronics module (2) and connected therewith.

Abstract: A method of controlling a single-phase linear motor (1) for driving a striking mechanism (2) with a loose coupling (4) between a runner (5) of the linear motor (1) and a striker (6) of the striking mechanism (2) has, within a striking period in which exactly one force impact (K) of the striker (6) is carried out on a tool (8) or an anvil (7), a pull phase (Z) in which the loose coupling (4) contacts a runner-side contact surface (KL) with a one-sided constrained contact and a push phase (D) in which the loose coupling (4) contacts a striker-side contact surface (KS) with a one-sided constrained contact, and a change phase (W) provided between the pull phase (Z) and the push phase (D) in which the one-sided constrained contact changes between the two contact surfaces (KL-KS) along a contactless reciprocating gap (S) in that the runner (5) releases the one-sided constrained contact with one contact surface (KL/KS) in a regulated manner and produces the one-sided constrained contact with the other contact surfac

Abstract: A control wall saw includes a guide rail (2) securable on a to-be-cut wall (7), a saw head (3) displaceable along the guide rail (2), a rotary drive, a pivotally adjustable saw arm (4) on a radially end of which a rotatably driven, disc-shaped saw blade (5) is releasably mountable, a programmable control element (13) for controlling at least the saw head (3) and the saw arm (4) and having an input (14) and an output (15), a displacement sensor (16) for determining a position of the saw head (3) along the guide rail (2) and connected with the programmable control element (13), and a pivot angle sensor (17) for determining a pivot angle (?) of the saw arm (4) relative to a longitudinal direction of the guide rail (2) and connected with the programmable control element (13).

Abstract: A control wall saw includes a guide rail (2) securable on a to-be-cut wall (7), a saw head (3) displaceable along the guide rail (2), a rotary drive, a pivotally adjustable saw arm (4) on a radially end of which a rotatably driven, disc-shaped saw blade (5) is releasably mountable, a programmable control element (13) for controlling at least the saw head (3) and the saw arm (4) and having an input (14) and an output (15), a displacement sensor (16) for determining a position of the saw head (3) along the guide rail (2) and connected with the programmable control element (13), and a pivot angle sensor (17) for determining a pivot angle (?) of the saw arm (4) relative to a longitudinal direction of the guide rail (2) and connected with the programmable control element (13).

Abstract: For the automatic determination of the diameter of a tool, particularly a saw blade for an automatic wall saw, which is driven by a motor via a gear unit, the moment of inertia of the tool is used as an indicator for its diameter. Three basic solution variants are introduced. In particular, the system including a motor, gear unit and tool is treated as a dual-mass oscillator such that the elasticity of the shafts and gears is arranged as a torsion spring between the inertial masses in two discrete points while taking into account two coefficients of friction including coefficients of the known inertia of the motor rotor (?R) and of the tool (?S). This system can be described by equations which are then simplified by reasonable assumptions or premises. The selected formulations are solved for the moment of inertia of the tool to determine the diameter therefrom and to make an optimal adjustment for the drive possible which is adapted to the respective tool.

Abstract: A control process for an at least partially axially hammering and rotating electric hand-held machine tool (1) in which an electromagnetic clutch (4) arranged in the flow of force between an electric motor (2) and a tool receptacle (3) is controllably connected to computing device (5) connected to sensors (6a, 6b, 6c), wherein the clutch (4) is repeatedly alternately opened and closed in at least one process step controlled by the computing device (5).

Abstract: For the automatic determination of the diameter of a tool, particularly a saw blade for an automatic wall saw, which is driven by a motor via a gear unit, the moment of inertia of the tool is used as an indicator for its diameter. Three basic solution variants are introduced. In particular, the system including a motor, gear unit and tool is treated as a dual-mass oscillator such that the elasticity of the shafts and gears is arranged as a torsion spring between the inertial masses in two discrete points while taking into account two coefficients of friction including coefficients of the known inertia of the motor rotor (?R) and of the tool (?s). This system can be described by equations which are then simplified by reasonable assumptions or premises. The selected formulations are solved for the moment of inertia of the tool to determine the diameter therefrom and to make an optimal adjustment for the drive possible which is adapted to the respective tool.

Abstract: A control process for an at least partially axially hammering and rotating electric hand-held machine tool (1) in which an electromagnetic clutch (4) arranged in the flow of force between an electric motor (2) and a tool receptacle (3) is controllably connected to computing means (5) connected to sensors (6a, 6b, 6c), wherein the clutch (4) is repeatedly alternately opened and closed in at least one process step controlled by the computing means (5).

Abstract: A hand-held electric machine tool (1) with an at least partly rotary-driven tool receptacle (2) for a tool and a press switch (5) arranged at a handle (4) on the workpiece side for activating the connection of a power source (6) to an electric motor (7) connected to control electronics (10) which are connected to a force sensor (8), wherein the force sensor (8) is arranged between the tool receptacle (2) and the handle (4) and is designed for measuring a pressing force (F) of the hand-held electric machine tool pressing against a workpiece. In addition, an intuitive control process for the hand-held electric machine tool (1) is claimed.

Abstract: A hand tool device (1), for a partially rotationally driven drill tool (2), including 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). The set value (S) can be transmitted into a set value memory (6) using a single manually operated transfer accept actuation.

Abstract: A microcontroller for controlling operation of a safety clutch of a hand-held electrical power tool and which is arranged in a force transmitting chain of the tool, with the microcontroller including a unit (2,5,4;8) for processing at least one parameter of the power tool and for outputting a resulting parameter in form of a calculated torque (M1), and a control unit (7) for comparing an actually measured torque (M) with the calculated torque (M1), and for outputting a control signal (&thgr;) when a difference between the actually measured and calculated torques exceeds a predetermined threshold.

Abstract: A hand-held rotary-percussion power tool includes an electrical drive (2) for generating a torque transmittable to a boring tool used with the power tool for forming blind bores, a hammer mechanism (3) for applying impacts to the boring tool, control device (7, 7′, 7″) for controlling operation of at least one of the electrical drive (2) and the hammer mechanism (3), and an electronic depth stop (4). The depth stop include a sensor (5) for contactless, distance measuring of a depth of a blind bore, and a computation unit (6) for generating a signal indicating that a sensed measurement value (M) corresponds to a set value of the depth of the blind bore, and connected with the control device (7, 7′, 7″).

Abstract: The method of and a device for using this method, on equipment or assigned to equipment for working a material, for investigating and identifying the nature of the material, which is to be worked and for making available at least one operating parameter for the optimized pre-setting of the working equipment, provides for the use of a sensor, preferably assigned directly to the working tool, such as a hammer drill, in order to detect shock waves generated or induced in the tool. From the shock wave signal measured, at least one distinguishing feature characteristic of the material to be worked, is extracted and evaluated for the comparative classification of the material by means of an algorithm. Preferably, an external force, especially the contacting force, acting on the working equipment, is taken into consideration for the algorithmic evaluation.

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 self-starting brushless electric motor having a first motor (stator) with poles arranged in a row, said poles constituting ferromagnetic poles or permanent-magnet poles, a second motor part (rotor) with poles arranged in a row, said poles consisting of ferromagnetic poles or permanent-magnet poles and being arranged opposite the row of poles on the first motor part, wherein the motor part with salient ferromagnetic poles or, if both motor parts have salient ferromagnetic poles, at least one of the motor parts has a permanent-magnet pole, and also a magnetizing winding on the first motor part. The system of poles formed by the pole rows is magnetically asymmetrical in the direction in which the motor parts are movable in relation to each other.

Abstract: An electrical hand-held power tool including an arrangement for actively damping vibrations applied to the tool handle (2) and arranged between the handle and the hammer mechanism module (3) with a possibility of a limited axial displacement along the percussion axis (A) with respect to the hammer mechanism module (3) and having at least one electromechanical actuator (5a, 5b) surrounded by an elastic spring (8a, 8b), a sensor for sensing vibrations acting on the handle (2), and a microprocessor (7) for dynamically controlling the actuator (5a, 5b) in accordance with the signal generated by the sensor.