PROCESS FOR CONTROLLING THE MOVEMENT OF AN UNIVERSALLY SWIVELLABLE CUTTING ARM OF A PARTIAL CUT CUTTING MACHINE AS WELL AS APPARATUS FOR PERFORMING THIS PROCESS

摘要

An apparatus and method are disclosed for controlling the movement of the universally swivellable cutting arm of a partial cut cutting machine of the kind having a first hydraulic drive for lifting and lowering the cutting arm in order to preselect the depth of cut and a further hydraulic drive for swivelling the cutting arm transversely relative to the direction of lifting and lowering movement. The time interval elapsed for actuating one of the drives of the cutting arm and/or the volumetric amount of pressurized fluid supplied to the respective drive is measured, and in dependence in the desired preselected depth of cut and after having attained the time interval of actuating one drive required for the preselected depth of cut or after having attained the volumetric amount required for the displacement in direction of the preselected depth of cut, the supply of pressurized fluid to said drive is shut off, and only the supply of pressurized fluid to the advancing drive is maintained.