An apparatus including a computer processor; a first tool device; a first device configured to hold the first tool device; and a second device configured to move the first tool device in x, y, and z directions, when the first tool device is being held by the first device, in response to commands from the computer processor; and a conveyor device having a belt. The first tool device may include a wheel. The first device may be configured with respect to the conveyor device, so that the wheel of the first tool device is configured to be lowered in the z direction into a material located on the belt of the conveyor device, and the first tool device is configured to be moved in the x and y direction, with the wheel simultaneously rotating and rolling through the material on the belt, in response to commands from the computer processor.