| 摘要 |
A method and an optoelectronic sensor are provided for ensuring the safety of a machine tool having a first tool part carrying out working movements in the direction of a second tool part. The sensor monitors a three-dimensional protected field between the tool parts of the machine tool. At the start of a working movement of a first tool part of the machine tool, the extent of the protected field in the direction of the working movement is smaller than the extent of the open gap between the tool parts. On a continued working movement, the extent of the protected field is continuously reduced and the protected field is held in the center of the open gap. Thereafter, on a further continued working movement, the extent of the protected field is maintained and the protected field is held in the center of the open gap. The sensor is finally deactivated.
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