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 method to control a power tool, especially a core drill, including a motor as the drive for the power tool, a control unit, a power display, a transmission having at least a first gear and a second gear, a first sensor to detect the rotational speed of at least one component of the transmission and a second sensor to detect the rotational speed of the motor. The method includes the following steps: ascertaining a first rotational speed of the at least one component of the transmission when the transmission has been put into a gear, ascertaining a first rotational speed of the motor when the transmission has been put into a gear, ascertaining the selection of the gear on the basis of a first prescribed ratio of the first rotational speed of the at least one component of the transmission and of the first rotational speed of the motor on the basis of a look-up table, and setting the limit value of the power display on the basis of the look-up table as a function of the gear that has been selected. A power tool for purposes of using the method.

A machining unit for a machine tool and machine tool having such a machining unit comprises a head carrier that is attached to the machine tool, a pivot head held on the head carrier in such a way that the pivot head can be pivoted about a pivot axis, a working spindle, which is arranged on the pivot head and has a spindle axis that is tilted in relation to the pivot axis, a spindle motor, which is arranged in the head carrier and has a drive shaft arranged parallel to the pivot axis, and a drive transmission for transmitting the rotational motion of the drive shaft of the spindle motor to the working spindle, wherein the drive transmission has a transmission stage that can be shifted. The pivot head has a shifting transmission shaft that is oriented coaxially to the pivot axis of the pivot head, wherein the transmission stage that can be shifted has a hollow shaft movably supported on the shifting transmission shaft of the pivot head.

A machining unit for a machine tool and machine tool having such a machining unit comprises a head carrier that is attached to the machine tool, a pivot head held on the head carrier in such a way that the pivot head can be pivoted about a pivot axis, a working spindle, which is arranged on the pivot head and has a spindle axis that is tilted in relation to the pivot axis, a spindle motor, which is arranged in the head carrier and has a drive shaft arranged parallel to the pivot axis, and a drive transmission for transmitting the rotational motion of the drive shaft of the spindle motor to the working spindle, wherein the drive transmission has a transmission stage that can be shifted. The pivot head has a shifting transmission shaft that is oriented coaxially to the pivot axis of the pivot head, wherein the transmission stage that can be shifted has a hollow shaft movably supported on the shifting transmission shaft of the pivot head.

A machine tool includes: a rotating portion that rotates around a first axis; a first arm that extends from the rotating portion; a second arm that is connected to the first arm and supports an end effector; a single power source that is configured to supply power to the rotating portion and the second arm; and a switching mechanism that is configured to switch a power supply destination from the power source from one of the rotating portion or the second arm to the other, wherein the second arm is configured to rotate around a second axis that intersects the first axis.

The present invention provides, in an embodiment, a gear-shifting structure of power equipment, the gear-shifting structure comprising: first and second gears having shafts concentric with a first shaft, respectively, the first and second gears being positioned at different locations along the axial direction of the first shaft, the first and second gears having protrusions formed thereon, respectively, and the first and second gears freely rotating with regard to the first shaft; a clutch disposed concentrically with the first shaft between the first and second gears, the clutch being spline-coupled to the first shaft, and the clutch having engaging members formed thereon so as to protrude toward the first and second gears, respectively; an adjustment member configured to move the clutch toward the first gear or the second gear; a second shaft; and third and fourth gears having shafts concentric with the second shaft, respectively, the third and fourth gears being disposed to engage with the first and second gears and to rotate together with the second shaft. The engaging members of the clutch engage with the protrusion of the first gear or the second gear by means of the adjustment member.

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 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 temperature acquisition section (acquisition module) acquires a temperature of an environment in which a printer device is used. A printing condition acquisition section (acquisition module) acquires information relating to printing conditions of the printer device. A conveyance load estimation section (estimation module) estimates a conveyance load when a stepping motor (motor) provided in the printer device conveys a printing paper (print medium) based on the information acquired by the temperature acquisition section and the printing condition acquisition section. A current value setting section (setting module) sets a current value to be applied to the stepping motor based on the conveyance load estimated by the conveyance load estimation section. A motor control section (control module) controls the stepping motor by applying the current value set by the current value setting section to the stepping motor.

A temperature acquisition section (acquisition module) acquires a temperature of an environment in which a printer device is used. A printing condition acquisition section (acquisition module) acquires information relating to printing conditions of the printer device. A conveyance load estimation section (estimation module) estimates a conveyance load when a stepping motor (motor) provided in the printer device conveys a printing paper (print medium) based on the information acquired by the temperature acquisition section and the printing condition acquisition section. A current value setting section (setting module) sets a current value to be applied to the stepping motor based on the conveyance load estimated by the conveyance load estimation section. A motor control section (control module) controls the stepping motor by applying the current value set by the current value setting section to the stepping motor.

A machine tool, in particular multi-spindle turning machine, comprising a machine frame, a turret body being rotatably supported by the machine frame, a plurality of workpiece spindles being arranged on the turret body, each of the workpiece spindles having a workpiece receiving portion for receiving a respective workpiece on one side of the turret body facing a working space of the machine tool, and a plurality of tool post assemblies supported by the machine frame around the turret body, wherein each tool post assembly includes a tool post having one or more tool cartridge receiving openings respectively being configured to detachably receive a tool holder cartridge TC holding a tool.