A method of machining at least one concrete part includes providing at least one concrete part; applying at least one marking to the at least one concrete part; arranging at least one machining device for machining the at least one concrete part relative to the at least one concrete part; detecting the at least one marking by at least one marking detection device and transmitting the marking data thus generated to the at least one machining device; and machining the at least one concrete part using the generated marking data by the at least one machining device.

In a self-propelled construction machine (1), in particular road milling machine, comprising a machine frame (8), at least three travelling devices (12, 16), wherein at least one of the three travelling devices (12, 16) is realized as a pivotable travelling device (16) so that said travelling device (16) is pivotable about at least one vertical pivoting axis in relation to the machine frame (8) between a first pivoted-in and at least one second pivoted-out position, at least one working device (20), in particular a milling drum, for working the ground pavement (3), at least one hydraulic drive system (70) for driving at least two travelling devices (12, 16), wherein at least one of the at least two driven travelling devices is the pivotable travelling device (16), wherein the hydraulic drive system (70) comprises at least one hydraulic pump (78), it is provided for the following features to be achieved: the hydraulic drive system (70) comprises one each hydraulic variable displacement motor (72) for driving the driven travelling devices (12) with the exception of the at least one pivotable travelling device (16), wherein the hydraulic drive system (70) comprises a hydraulic fixed displacement motor (74) for driving the at least one pivotable travelling device (16).

A self-propelled construction machine comprises a machine frame, at least three travelling devices, at least one hydraulic drive system for driving at least two travelling devices, wherein the hydraulic drive system comprises at least one controllable hydraulic motor with variable displacement volume and at least one hydraulic pump, at least one working device (e.g. a milling drum), for working the ground pavement. A detection device detects fluctuations in the longitudinal speed of the construction machine during movement thereof, wherein a control unit alters the displacement volume of the at least one controllable hydraulic motor as a function of the detected fluctuations so that the natural frequency of the hydraulic drive system is altered, wherein the control unit adjusts the discharge volume of the pump as a function of the amount of adjustment of the displacement volume in such a fashion that the specified drive speed remains constant.

The present disclosure provides a method and a device for cutting a solar silicon wafer, and a storage medium, which relate to the technical field of crystalline silicon cutting and can solve a problem of high labor intensity of operators caused by repeated operation in solar silicon wafer cutting, improve production efficiency and reduce misoperation. A technical solution is specifically as follows: loading materials to be cut to a section cutter (101); adjusting a cutting wire mesh according to preset requirements, starting a cutting procedure when cutting conditions are met, and cutting the materials to be cut (102); generating prompt information for completed cutting after the cutting is completed (103); and unloading cut materials from the section cutter according to the prompt information for the completed cutting (104). The present disclosure is used for silicon wafer cutting.

A floor saw for sawing in a concrete surface segment (160), the floor saw comprising a circular cutting blade (110) arranged transversally offset from a centrum line (C), which centrum line (C) is aligned with a forward direction (F) of the floor saw, the floor saw further comprising at least two supporting wheels (120) arranged to support the floor saw on the concrete surface segment (160), out of which supporting wheels at least one is a drive wheel, a sensor arrangement (140) configured to determine a current yaw motion of the floor saw, and a control unit (130) configured to obtain a desired yaw motion setting, wherein the drive wheel is arranged on an opposite side of the centrum line (C) compared to the circular cutting blade (110) and arranged to generate a respective variable wheel force by a respective first electric machine controlled by the control unit (130), and wherein the control unit (130) is arranged to control the first electric machine to reduce a difference between the current yaw motion of the floor saw and the desired yaw motion setting.

A method for operating a system that includes a main machine tool, an auxiliary device, and a transmission device with a first sending and receiving device assigned to the main machine tool and a second sending and receiving device assigned to the auxiliary device includes sending a first signal that represents a connection inquiry from the first sending and receiving device to the second sending and receiving device after an actuation of an input device of the main machine tool by a user. A second signal that represents a connection response from the second sending and receiving device is sent to the first sending and receiving device after an actuation of an actuating device of the auxiliary device by the user. The method further includes activating and/or testing an emergency cutout functionality of the actuating device by the actuation of the actuating device of the auxiliary device by the user.

A cutting apparatus having adjustable direction, according to the present invention, can comprise: a cutting frame; a cutting shaft disposed at the front of the cutting frame and a cutting blade fitted into the cutting shaft, when the proceeding direction of the cutting apparatus is the front and the opposite direction thereof is the rear; a direction-adjusting unit positioned below the cutting frame at the rear of the cutting frame so as to be connected to the cutting frame and adjust the cutting shaft so that same can rotate; and an intermediate frame for supporting the direction-adjusting unit.

A floor saw for sawing in a concrete surface segment (160), the floor saw comprising a circular cutting blade (110) arranged transversally offset from a centrum line (C), which centrum line (C) is aligned with a forward direction (F) of the floor saw, the floor saw further comprising at least two supporting wheels (120) arranged to support the floor saw on the concrete surface segment (160), out of which supporting wheels at least one is a drive wheel, a sensor arrangement (140) configured to determine a current yaw motion of the floor saw, and a control unit (130) configured to obtain a desired yaw motion setting, wherein the drive wheel is arranged on an opposite side of the centrum line (C) compared to the circular cutting blade (110) and arranged to generate a respective variable wheel force by a respective first electric machine controlled by the control unit (130), and wherein the control unit (130) is arranged to control the first electric machine to reduce a difference between the current yaw motion of the floor saw and the desired yaw motion setting.

Simulated bog-down system and method for power tools. One power tool according to an example embodiment includes a power source and a motor selectively coupled to the power source. The motor includes a rotor and stator windings. The power tool includes an actuator configured to generate a drive request signal and a power switching network configured to selectively couple the power source to the stator windings of the motor. The power tool includes an electronic processor coupled to the power source, the actuator, and the power switching network. The electronic processor is configured to detect a load on the power tool and compare the load to a threshold. The electronic processor is configured to determine that the load is greater than the threshold, and to control the power switching network to simulate bog-down in response to determining that the load is greater than the threshold.

Provided herein is an electric powered digging apparatus comprising: a powerhead, the power head comprises a motor and a gearbox; a handle frame, the powerhead is mounted onto the handle frame; and a drill bit, the drill bit is driven by the motor to rotate around a longitudinal axis, the electric power digging apparatus further comprises: a first safety mechanism, wherein the first safety mechanism reduces torque output to the drill bit when the powerhead spins around the longitudinal axis for an angle larger than a first threshold, and a second safety mechanism, wherein the second safety mechanism reduces torque output to the drill bit when the powerhead spins around the longitudinal drive axis at an angular speed larger than a second threshold FIG. 1