the tracks 14 directional joystick movement 62 identified in the schematic as j 2 may be a forward aft motion of the same first joystick producing a vertical movement i e the raising and lowering of the boom 20 directional joystick movement 64 identified in the schematic as j 3 may be a forward aft motion of a second joystick not shown resulting in a forward aft motion of the stick 22 finally directional joystick movement 66 identified in the schematic as j 4 may be a side to side motion of the same second joystick resulting in a vertical rotation of the shovel 24 the disclosed control system 40 may incorporate additional enhancements for example the opening and closing functions of the clam 30 may be associated with a so called u201c ramp down u201d feature wherein hydraulic actuating cylinders 26 associated with the clam 30 may utilize a control valve system configured for slowing the flow of hydraulic fluid as the ends of cylinder travel associated with the opening and closing limits of clam movement are approached whether during cylinder extension or retraction this feature may soften normally otherwise harsh loads associated with u201c hitting the stops u201d and thus may be effective to avoid damage to cylinder end parts and or to otherwise prolong the.