Machine device and method for ensuring a predetermined machining depth

Method for the automated determination of a total displacement path of a processing unit (2) for ensuring a predetermined processing depth in a workpiece which is processed by means of a processing device formed in accordance with any one of the preceding Claims, comprising the following method steps:

• i) starting from a predetermined rest position (PR) in which the feed device (10) and the drive device (14) of the pressure unit (12) are in a defined starting position,
• the processing unit (2), together with the processing tool (2a) is displaced into a calibration position (PK) via the feed device (10), wherein a positionally-fixed position detecting device (S1, S2) at a known axial distance (I1) to the contact surface of the pressure plate (6) determines when the calibration position (PK) has been reached,
• and the covered displacement path (z1;
• z1′) between the rest position (PR) and the calibration position (PK) is determined and
• ii) in dependence upon the known distance (I1) and in dependence upon the covered displacement path (z1;
• z1′) and in consideration of the desired processing depth (BT), the total displacement path for the processing unit (2) in the direction of the workpiece (W) to be processed is determined