Abstract: A computer-assisted method for determining dimensional properties of a measurement object using a coordinate measuring machine. An image representation of the measurement object is shown to a user and the user selects a first geometric element of the measurement object, resulting in the display of eligible test features for the selected first geometric element. The eligible test features are automatically determined from a plurality of typical test features stored in a database, by the selected first geometric element being assigned to one of a plurality of predefined measurement elements stored in the database. A defined measurement sequence is generated in a computer-assisted manner based on the test feature selected by the user. Individual measured values are recorded on the first geometric element using the defined measurement sequence.

Abstract: A saber saw (1) for processing a workpiece, in particular a mineral or metallic material, including a drive (20), and a reciprocating rod (60) having a first end (63), a second end (68) and a drive point (69). Moreover, a first articulated rod (40) having a pivot point (42) and a connection point (44) as well as a second articulated rod (50) having a first pivot point (52) and a second pivot point (54) are provided, whereby the pivot point (42) of the first articulated rod (40) can be rotatably connected to the drive point (69) of the reciprocating rod (60), and the connection point (44) of the first reciprocating rod (40) can be non-rotatably connected to the drive (20) by-a connection mechanism (70), and whereby the drive (20) can be situated at least partially in a drive housing.

Abstract: The invention relates to a method and to a circuit arrangement for limiting the starting current for intermediate voltage circuits that have at least one storage capacitor.

Abstract: A protective circuit protects against overheating of the stator windings of an EC motor. The stator windings are connected to a semiconductor output stage which is designed for time-offset control of the stator windings using a driver circuit of a commutation controller. The protective circuit has two redundant sensor circuits, wherein two resistance-dependent sensor elements connected in series are provided in the first sensor circuit and one resistance-dependent sensor element is provided in the second sensor circuit. The first and the second sensor circuits are connected, respectively, to two evaluating circuits separated from each other and cause an interruption of the driver circuit using switch-off means when a system-specific resistance value of the first sensor element or the one sensor element associated with the second sensor circuit is reached.

Abstract: A circular saw, in particular hand circular saw, is disclosed. The circular saw has a workpiece support surface, a saw blade and a protective cover, which covers the saw blade in a region above a workpiece to be processed. The protective cover has such a geometry and position with respect to the saw blade that a straight line, which originates from the first deflection of a tangent applied at the intersection of the saw blade circumference with the workpiece support surface from the protective cover encloses an angle of up to 30°, in particular up to 20°, with a line perpendicular to the workpiece support surface.

Abstract: A protective circuit protects against overheating of the stator windings of an EC motor. The stator windings are connected to a semiconductor output stage which is designed for time-offset control of the stator windings using a driver circuit of a commutation controller. The protective circuit has two redundant sensor circuits, wherein two resistance-dependent sensor elements connected in series are provided in the first sensor circuit and one resistance-dependent sensor element is provided in the second sensor circuit. The first and the second sensor circuits are connected, respectively, to two evaluating circuits separated from each other and cause an interruption of the driver circuit using switch-off means when a system-specific resistance value of the first sensor element or the one sensor element associated with the second sensor circuit is reached.

Abstract: A counterweight device for use in a saber saw, including a drive, a reciprocating rod and at least a first articulated rod, whereby the counterweight device can be moved reversibly by the drive in a first pendulum motion and a second pendulum motion. The first pendulum motion of the counterweight device runs essentially opposite to a first pendulum motion of the articulated rod, and the second pendulum motion of the counterweight device runs essentially opposite to a second pendulum motion of the articulated rod.

Abstract: The invention relates to a method and to a circuit arrangement for limiting the starting current for intermediate voltage circuits that have at least one storage capacitor.

Abstract: A computer-assisted method for determining dimensional properties of a measurement object using a coordinate measuring machine. An image representation of the measurement object is shown to a user and the user selects a first geometric element of the measurement object, resulting in the display of eligible test features for the selected first geometric element. The eligible test features are automatically determined from a plurality of typical test features stored in a database, by the selected first geometric element being assigned to one of a plurality of predefined measurement elements stored in the database. A defined measurement sequence is generated in a computer-assisted manner based on the test feature selected by the user. Individual measured values are recorded on the first geometric element using the defined measurement sequence.

Abstract: An electronic control circuit for an electronically commutated motor (ECM) is disclosed. A plurality of power transistors controls the ECM, and a reference transistor is formed together with the power transistors on a common support. A control unit is configured to, in a test mode: apply a test current to the reference transistor and one of the power transistors respectively; measure a saturation voltage of the reference transistor and one of the power transistors; evaluate a saturation voltage difference between the measured saturation voltages of the reference transistor and the respective power transistor; evaluate a rate of change of saturation voltage differences between a first iteration of the test mode and a second iteration of the test mode; and determine an expected remaining service life of the power transistors based on the temperature of the support during the test mode and the rate of change of the saturation voltage differences.

Abstract: A counterweight device for use in a saber saw, including a drive, a reciprocating rod and at least a first articulated rod, whereby the counterweight device can be moved reversibly by the drive in a first pendulum motion and a second pendulum motion. The first pendulum motion of the counterweight device runs essentially opposite to a first pendulum motion of the articulated rod, and the second pendulum motion of the counterweight device runs essentially opposite to a second pendulum motion of the articulated rod.

Abstract: A saber saw (1) for processing a workpiece, in particular a mineral or metallic material, including a drive (20), and a reciprocating rod (60) having a first end (63), a second end (68) and a drive point (69). Moreover, a first articulated rod (40) having a pivot point (42) and a connection point (44) as well as a second articulated rod (50) having a first pivot point (52) and a second pivot point (54) are provided, whereby the pivot point (42) of the first articulated rod (40) can be rotatably connected to the drive point (69) of the reciprocating rod (60), and the connection point (44) of the first reciprocating rod (40) can be non-rotatably connected to the drive (20) by-a connection mechanism (70), and whereby the drive (20) can be situated at least partially in a drive housing.

Abstract: A hand-held electric power tool having a tool that can be rotated around a rotational axis by the drive unit, having a protective cover that at least partially surrounds the tool, having an outlet opening that conveys out of the protective cover the material removed from the workpiece that is to be machined, and having a suction adapter that is connected to the protective cover and that has a connection section with a suction opening for connecting a suction device, the suction adapter having a guide device for guiding the material being removed, the guide device having an outlet opening that differs from the suction opening.

Abstract: The disclosure relates to an electronic control circuit for an electric device, in particular designed as a commutation electric system of an EC motor, having a plurality of power transistors which are controlled in an operating mode for controlling the device. An additional, similar, non-charged reference transistor in the operating mode of the power transistors is arranged or formed together with the power transistors on a common support or substrate.

Abstract: A fastening apparatus for a limit stop element of an electric hand tool, in particular a hand circular saw, is disclosed. The fastening apparatus includes a guide, into which the limit stop element can be inserted and along which it can be displaced, and a locking mechanism, which can lock the limit stop element in the displacement direction. The locking mechanism has a spring element, which, in its locked position, clamps the limit stop element with a clamping force directed against the limit stop element and, in a released position, permits a displacement of the limit stop element.

Abstract: A hand-operated jigsaw is disclosed. The reciprocating drive mechanism has a reciprocating body which can be put into a reciprocating motion along an axis via an eccentric of an eccentric wheel that can be set in motion by the motor. The eccentric wheel is arranged on a pivot bearing axis. The reciprocating drive mechanism has an additional mass with a mass center of gravity to minimize vibrations. The additional mass is arranged in a rotationally fixed manner with the eccentric wheel on the pivot bearing axis. An eccentric axis of the eccentric lies on a first radial of the pivot bearing axis, which is offset from a second radial in the operating direction of rotation of the eccentric wheel at an angle of between 190° and 270°, which second radial lies between the mass center of gravity of the additional mass and the pivot bearing axis.

Abstract: A fastening apparatus for a limit stop element of an electric hand tool, in particular a hand circular saw, is disclosed. The fastening apparatus includes a guide, into which the limit stop element can be inserted and along which it can be displaced, and a locking mechanism, which can lock the limit stop element in the displacement direction. The locking mechanism has a spring element, which, in its locked position, clamps the limit stop element with a clamping force directed against the limit stop element and, in a released position, permits a displacement of the limit stop element.

Abstract: A replaceable chuck for a percussion hand-held power tool (3) for applying axial blows to a working tool receivable in the chuck, includes a release sleeve (4) axially displaceable relative to the base body (6) against a spring-biasing force and including an inwardly located locking element (11) for formlockingly securing the chuck on a power tool spindle (15) with locking elements (12) extending through respective openings (13) formed in a base body (6) and engageable in associated recesses (14) of the power tool spindle (15), and a formlocking displacement guide (5) that provides for displacement of the release sleeve (4) relative to the base body (6) and includes, along its axial extension, a tangential section.

Abstract: A hand-held electric power tool (1) having a tool (6) that can be rotated around a rotational axis (8) by the drive unit (3), having a protective cover (7) that at least partially surrounds the tool (6), having an outlet opening (12) that conveys out of the protective cover (7) the material removed from the workpiece that is to be machined, and having a suction adapter (13) that is connected to the protective cover (7) and that has a connection section (21) with a suction opening (22) for connecting a suction device, the suction adapter (13) having a guide device (23) for guiding the material being removed, the guide device (23) having an outlet opening (26) that differs from the suction opening (22).

Abstract: A hand-held reciprocating power saw (10) includes a reciprocation member (21) for reciprocatingly moving a working tool, a compensation mass (22), a motor-driven eccentric wheel (23) having a first eccentric (24) for reciprocatingly displacing the reciprocation member (21) and a second eccentric (25) for reciprocating the compensation mass (22) along an axis (A), with the outer surface (28) of the second eccentric (25) engaging in an opening (26) provided in the compensation mass (22) and defined by a circumferential wall (27), and an intermediate member (30) arranged between the circumferential wall (27) and the outer surface (28) of the second eccentric (25) at least in the contact regions (41, 42), between the circumferential wall (27) and the outer surface of second eccentric, with the intermediate member (30) having a first radial extension (R1) oriented parallel to the axis (A) and a second radial extension (R2) oriented perpendicular to the axis (A) and greater than the first radial extension (R1).