Patent ID: 11866893
Assignee: WIRTGEN GMBH
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 7:
8. A self-propelled construction machine comprising:
a machine frame supported by a chassis having wheels or crawler tracks;
a milling drum arranged on the machine frame for machining the ground;
a drive device for driving the wheels or crawler tracks and the milling drum;
a lifting device for adjusting a height of the milling drum with respect to a surface of the ground to be machined; and
a control and processing unit configured:
when an advance speed of the construction machine is zero, to lower the milling drum to a first position wherein a lower edge of a cutting circle of the milling drum is at a level of the surface of the ground, wherein a milling depth of the milling drum is calibrated to zero;
while the advance speed of the construction machine is still zero, to lower the milling drum from the first position into a second position wherein the lower edge of the cutting circle of the milling drum is at a distance from the level of the surface of the ground corresponding to a specified milling depth;
while machining the ground at an advance speed above zero, to continuously adjust a position of the milling drum, dependent on a type of the milling drum, the advance speed of the construction machine, and a rotation speed of the milling drum, wherein the specified milling depth is corrected to correspond to a desired milling profile; and
when the construction machine returns to an advance speed of zero, to raise the milling drum to at least a position wherein the lower edge of the cutting circle of the milling drum is at a distance from the level of the surface of the ground corresponding to a current specified milling depth.