Fast-rotating processing machine e.g. grooving machine, for processing wood piece, has drive device exhibiting converter device, which is formed with device for sensor less safety relevant monitoring of number of revolutions

摘要

The processing machine has a processing device and a drive device (4) exhibiting an electric motor (6) and a converter device. The electric motor is mechanically connected with the processing device on one side and is electrically coupled with the converter device on another side. The drive device has a converter device (20), which is formed with a device for sensor less safety relevant monitoring of number of revolutions. The processing device is provided with a brake device. A processing spindle (2) is provided as the processing device.