A method uses a wire saw to cut slices from a workpiece. The wire saw has an array of saw wire tensioned in a plane between two rollers supported between fixed and floating bearings. During a cut-off operation, the workpiece is fed through the wire array with simultaneous axial movement of the floating bearings by adjusting the temperature of the fixed bearings with a cooling fluid in accordance with the temperature of the cooling fluid being in dependence on a depth of cut and correlating with a first correction profile, which specifies the travel of the floating bearings in dependence on the depth of cut. Also, the workpiece is fed through the wire array while simultaneously moving the workpiece along the workpiece axis in accordance with a second correction profile, specifying the travel of the workpiece. The first and second correction profiles are opposed to a shape deviation.

Method and calculating unit for curve sawing of a block in a cutting direction with at least a first circular saw blade. The method comprises determining a radius of the curve sawing, by measuring the curvature of the block in the direction of cutting; calculating a vertical inclination angle of the first circular saw blade in a vertical plane relative to the cutting direction in the block, based on the determined radius of the curve sawing; inclining the first circular saw blade with the calculated vertical inclination angle; and sawing the block in the cutting direction with the inclined first circular saw blade along the determined radius of the curve sawing.

A power tool with a rotatable tool designed as a saw blade or a milling cutter, including a sensor device for detecting a mechanical quantity, the mechanical quantity having a force, an acceleration, a velocity, a deflection, a deformation and/or a mechanical stress, and the mechanical quantity being dependent on a force emanating from the tool, and a control device communicatively coupled to the sensor device, which control device is adapted to recognize a kickback event based on the detected mechanical quantity, where the control device is adapted to selectively determine a first recognition function or a second recognition function different from the first recognition function based on a function determination information, and to perform the recognition of the kickback event based on the detected mechanical quantity using the determined recognition function.

A self-dust extraction dustless miter saw includes a pedestal, a disc mounted on the pedestal, and a sawing mechanism installed above the disc, the sawing mechanism includes a saw blade, a blade guard installed above the saw blade, and an upper dust extraction channel; the upper dust extraction channel is arranged at a lower rear of the blade guard and is configured to extract a dust carried by the saw blade while cutting; the self-dust extraction dustless miter saw further includes a lower dust extraction channel, the lower dust extraction channel is mounted to a rear of the disc, a first end of the lower dust extraction is connected with the disc, and a second end of the lower dust extraction channel is connected with a self-dust extraction device of the self-dust extraction dustless miter saw through a pipe.

Power tools such as cutting saws with rotary powered blades are described. Also described are various accessories for tools used with cylindrical workpieces such as pipes are described. The accessories include a clamp and saw joint assembly, various quick connection assemblies between a saw and a clamping system, a plunge guide assembly, a latch plate assembly, an interlock switch, a blade guard system, and a chip management system or chip deflector. Also described are related methods of use.

A power tool such as a table saw includes a cutting blade, a motor that drives the blade, and a dust management assembly for collecting cutting debris. The position and angle of the blade can be adjusted relative to a table top of the saw. The dust management assembly is disposed below the table top in such a way so as to change positions in concert with the blade, and includes a blade cover that surrounds a portion of the blade; a dust shield that is pivotably connected to the table top in such a way that an inner surface of the dust shield faces toward an outer wall of the blade cover; and a dust port that is detachably connected to the blade cover and is configured collect debris generated by a cutting action of the blade.

A power tool communication system including an external device including a first controller configured to transmit, via wireless communication to a power tool, configuration data including a work light duration parameter value and a work light brightness parameter value. The power tool includes a housing, a brushless direct current (DC) motor, a trigger, a work light, a wireless communication circuit configured to wirelessly communicate with the external device to receive the configuration data, and a second controller configured to control a work light duration of the work light based on the work light duration parameter value, and control a work light brightness of the work light based on the work light brightness parameter value.

A power tool includes a housing, a motor located within the housing, a drive assembly located within the housing and connected to an output of the motor, at least one cutting wheel coupled to the drive assembly, and at least one switch configured to control activation of the motor for directional rotation of the drive assembly in either a forward rotational direction or a reverse rotational direction. The drive assembly is configured to operate in the reverse rotational direction during dry cutting. The drive assembly is configured to operate in the forward rotational direction during wet cutting.

A handheld power tool with a rotatable tool, in which the handheld power tool is a saw blade or milling cutter. The handheld power tool includes a sensor device for detecting a mechanical vector quantity. The mechanical vector quantity includes a force, an acceleration, a velocity, a deflection, a deformation and/or a mechanical stress and the mechanical vector quantity depends on a force emanating from the handheld tool. The handheld power tool also includes a control device which is communicatively coupled to the sensor device and is adapted to recognize an event and/or a state of the power tool according to a direction and/or change of direction of the mechanical vector quantity detected by the sensor device.

An electric working machine in one aspect of the present disclosure includes: a motor; a driver to drive the motor; a first control circuit; and a second control circuit. The first control circuit controls the driver such that the motor rotates in a set rotation direction. The second control circuit is provided separately from the first control circuit. The second control circuit detects a rotation direction of the motor and performs an abnormality handling process to stop rotation of the motor in response to a situation where the detected rotation direction is reverse to the set rotation direction.