Patent ID: 7422391

Claim:
A road milling machine for stripping traveled surfaces by a milling roller having a plurality of chisels, wherein a signal pickup unit is assigned to at least one machine component involved in a work process, wherein the signal pickup unit detects an operational status of the machine component, the signal pickup unit is connected to a signal output unit via a signal processing arrangement having a machine frame ( 10 ) supported by a running gear ( 11 , 12 ), at least one drive motor is assigned to the running gear, the machine frame ( 10 ) is supported at least in some areas by at least one adjustment device ( 20 ), and the machine frame ( 10 ) can be height-adjusted at least in some areas by the adjustment device ( 20 ) for assigning a fluid under pressure to the adjustment device ( 20 ), the road milling machine comprising: the drive motors designed as hydraulic motors, and the signal pickup unit detecting pressure fluctuations of a hydraulic pressure in the fluid of the drive motor or of the adjustment device ( 20 ), and the signal processing arrangement comparing a detected fluctuation image of the pressure fluctuations to a homogeneous fluctuation image of a milling roller with the chisels in an unworn state and displaying deviations between the homogeneous fluctuation image and the detected fluctuation image with a signal output arrangement.