Cutting device with changeable cutting depth

A cutting apparatus comprising:

• a travel gear for moving the cutting apparatus on a subsurface;
• a cutting disc which can be rotationally driven by a drive;
• a supporting frame supporting the drive with the cutting disc;
• an underframe which is fastened to the supporting frame in a movable manner and supports at least one part of the travel gear;
• and
• an adjusting arrangement for adjusting the relative position of the underframe and the supporting frame, the adjusting arrangement having:
• a coarse-adjustment device configured to selectively fix the relative position in a transport position and a cutting position;
• and
• a fine-adjustment device configured to adjust the selectively fixed relative position within a certain region;
• wherein the fine-adjustment device superimposes the effect of the coarse-adjustment device in at least one of the transport position and the cutting position.

A cutting apparatus comprising:

• a travel gear for moving the cutting apparatus on a subsurface;
• a cutting disc which can be rotationally driven by a drive;
• a supporting frame supporting the drive with the cutting disc;
• an underframe which is fastened to the supporting frame in a movable manner and supports at least one part of the travel gear;
• and
• an adjusting arrangement for adjusting the relative position of the underframe and the supporting frame, the adjusting arrangement having:
• a coarse-adjustment device configured to selectively fix the relative position in a transport position and a cutting position;
• and
• a fine-adjustment device configured to adjust the selectively fixed relative position within a certain region;
• wherein the fine-adjustment device superimposes the effect of the coarse-adjustment device in at least one of the transport position and the cutting position.

A method comprising:

• providing a cutting apparatus having 1) a supporting frame supporting a cutting disc which can be rotationally driven by a drive and 2) an underframe which is fastened to the supporting frame in a movable manner and which supports at least one part of a travel gear for moving a cutting apparatus on a subsurface;
• selectively adjusting a cutting depth of the cutting apparatus by:
• selectively operating a coarse-adjustment device to move the underframe and supporting frame relative to one another between a transport position in which the cutting disc is spaced from a surface to be cut and a discrete cutting position in which the cutting disc engages and cuts the surface to be cut, the coarse-adjustment device being operable to relatively move the underframe and supporting frame bi-directionally between the transport position and the cutting position, and
• selectively operating a fine-adjustment device to effect additional relative movement between the underframe and the supporting frame, wherein the effects of the fine-adjustment device are superimposed on the effects of the coarse-adjustment device in at least one of the transport position and the cutting position.