A tool presetting and/or tool measuring apparatus device includes a carrier unit and a spindle unit, in particular motor spindle unit, which is supported by the carrier unit, which is at least configured for a rotation of an object inserted in the spindle unit, in particular a tool and/or a tool holder, around a spindle axis of the spindle unit and which comprises at least one drive unit for generating the rotation movement of the object, wherein the spindle unit includes a coupling unit which is configured, in particular for the purpose of changing a maximally achievable spindle torque, to drive the spindle unit in at least two differing modes.

A precision machine tool includes: a tool support for supporting a tool; a tool table serving as a moving mechanism capable of moving the tool support; and one or multiple imaging devices fixed to the tool support, the imaging devices each having an imaging unit configured to capture the image of a machining point on a workpiece machined by the tool.

A precision machine tool includes: a tool support for supporting a tool; a tool table serving as a moving mechanism capable of moving the tool support; and one or multiple imaging devices fixed to the tool support, the imaging devices each having an imaging unit configured to capture the image of a machining point on a workpiece machined by the tool.

A handheld work apparatus has a combustion engine (4) for driving a tool. The combustion engine (4) has an ignition device, a device for metering fuel and a control device (31). The control device (31) engages when an engagement speed (n.sub.E1, n.sub.E2) is reached, in order to limit the speed (n) of the combustion engine (4). In order to allow the speed (n) to be set in an easy manner at full throttle, the work apparatus has a device for setting the engagement speed (n.sub.E2) by the user.

A welding system includes a first position detection system, a second position detection system independent of the first position detection system, and a controller coupled to the first and second position detection systems. The first position detection system is configured to generate a first output corresponding to a first position and a first orientation of a welding torch during a welding session for a weld. The second position detection system is configured to generate a second output corresponding to a second position and a second orientation of the welding torch during the welding session. The controller is configured to determine welding parameters during the welding session based at least in part on the first output, the second output, or any combination thereof. The welding parameters may include a work angle, a travel angle, a contact tip to work distance, a travel speed, an aim, or any combination thereof.

A high-precision linear actuator is described that includes a first straight-guide mechanism that guides movements of an actuator element and a working device relative to an actuator housing. A pressing mechanism that, in a pressing-contact condition, presses the actuator frame and the actuator housing with a predetermined force against one another. A second straight-guide mechanism that guides movements of the actuator housing relative to the actuator frame between the pressing-contact condition and released-contact conditions in which the pressing mechanism presses the actuator frame and the actuator housing towards one another. The high-precision linear actuator provides a safety mechanism automatically reinstates negative consequences of unforeseen collisions in the working environment. In addition the high-precision linear actuator allows for a compact and light-weight design of the actuator element and the working device, which improves operational speed and effectivity of the linear actuator.

The motor driving device is to be mounted to a control panel, and includes: a motor driving device main body; a radiator disposed to face a rear surface of the motor driving device main body; a fan motor unit being disposed above the radiator and being withdrawable through an area above the motor driving device main body; and a floor sheet member configured to be laid out along a withdrawal route of the fan motor unit in a process of withdrawing the fan motor unit.

A change device for changing or exchanging of tools and/or workpieces. The change device has a gripper device with at least one gripper arm that extends away from a rotation support body that is rotatably supported about the rotation axis and that has a holder for respectively one tool or one workpiece at its free end. By means of a rotary power train with a rotary drive motor and a rotary drive transmission, the gripper device can be rotated about the rotation axis. Particularly the rotary drive transmission has a belt gear. A first rotary position sensor is directly or indirectly coupled with the rotation support body and/or transmission output of the rotary drive transmission without interconnection of the rotary drive transmission for detection of the rotary position of the gripper device about the rotation axis.

A precision machine tool includes: a tool support for supporting a tool; a tool table serving as a moving mechanism capable of moving the tool support; and one or multiple imaging devices fixed to the tool support, the imaging devices each having an imaging unit configured to capture the image of a machining point on a workpiece machined by the tool.

A precision machine tool includes: a tool support for supporting a tool; a tool table serving as a moving mechanism capable of moving the tool support; and one or multiple imaging devices fixed to the tool support, the imaging devices each having an imaging unit configured to capture the image of a machining point on a workpiece machined by the tool.