Mobile machine tool

A mobile machine tool for machining a workpiece wherein the machine tool has a guide element with a guide surface for guiding the machine tool on the workpiece or the workpiece on the machine tool, wherein the machine tool has a drive unit with a drive motor for driving a tool holder arranged on the drive unit, wherein the drive unit is, by means of a bearing arrangement mounted adjustably on the guide element in order to adjust at least two adjustment positions of the tool holder relative to the guide surface, wherein at least one adjustment position corresponds to a workpiece machining position in which the work tool arranged on the tool holder is, in a workpiece contact region, in contact with the workpiece and wherein the machine tool has at least one tool sensor for detecting the workpiece contact region and at least one position sensor, separate from the tool sensor, for detecting a relative position of the drive unit relative to the guide element, and wherein the machine tool has an evaluation device for evaluating sensor signals of the position sensor and of the tool sensor,

• wherein the mobile machine tool further comprises a depth adjustment device for adjusting a penetration depth of the work tool in the workpiece, wherein the depth adjustment device has a stop element, mounted moveably on a mounting contour which is arranged on the guide element and/or which can be fixed in a setting position assigned to a respective adjustment position of the tool holder relative to the guide surface, against which the drive unit comes to rest in the respective setting position.

A mobile machine tool for machining a workpiece wherein the machine tool has a guide element with a guide surface for guiding the machine tool on the workpiece or the workpiece on the machine tool, wherein the machine tool has a drive unit with a drive motor for driving a tool holder arranged on the drive unit, wherein the drive unit is, by means of a bearing arrangement mounted adjustably on the guide element in order to adjust at least two adjustment positions of the tool holder relative to the guide surface, wherein at least one adjustment position corresponds to a workpiece machining position in which the work tool arranged on the tool holder is, in a workpiece contact region, in contact with the workpiece and wherein the machine tool has at least one tool sensor for detecting the workpiece contact region and at least one position sensor, separate from the tool sensor, for detecting a relative position of the drive unit relative to the guide element, and wherein the machine tool has an evaluation device for evaluating sensor signals of the position sensor and of the tool sensor,

• wherein the mobile machine tool further comprises a tool sensor arrangement comprising at least two tool sensors, each covering a respective partial workpiece contact region of the workpiece contact region on opposite sides of the work tool, wherein a section of the work tool engages in the workpiece in each partial workpiece contact region, and
• wherein the evaluation device is provided with a calibration means for calibrating a position signal determined by the position sensor on the basis of workpiece actual position signals determined through tool sensors assigned to the partial workpiece contact regions of the workpiece contact region.

A mobile machine tool for machining a workpiece wherein the machine tool has a guide element with a guide surface for guiding the machine tool on the workpiece or the workpiece on the machine tool, wherein the machine tool has a drive unit with a drive motor for driving a tool holder arranged on the drive unit, wherein the drive unit is, by means of a bearing arrangement mounted adjustably on the guide element in order to adjust at least two adjustment positions of the tool holder relative to the guide surface, wherein at least one adjustment position corresponds to a workpiece machining position in which the work tool arranged on the tool holder is, in a workpiece contact region, in contact with the workpiece and wherein the machine tool has at least one tool sensor for detecting the workpiece contact region and at least one position sensor, separate from the tool sensor, for detecting a relative position of the drive unit relative to the guide element, and wherein the machine tool has an evaluation device for evaluating sensor signals of the position sensor and of the tool sensor,

• wherein the tool is configured to provide at least one function depending on a detection of a workpiece marking arranged on the workpiece, and
• wherein the at least one function comprises a display of a distance of a current machined edge from the workpiece marking and/or an actuation of the drive unit and/or a braking of the work tool and/or of an actuating drive of the machine tool in order to adjust the drive unit relative to the guide unit on reaching the workpiece marking.