Construction equipment

A construction equipment comprising:

• an undercarriage;
• an upper swing body rotatably supported on the undercarriage;
• a work device supported by the upper swing body and comprising a boom, an arm, and a bucket, which operate by means of respective hydraulic cylinders;
• a control valve for controlling the boom cylinder;
• an electronic proportional pressure reducing valve for controlling a spool of the control valve;
• a control lever for outputting a control signal corresponding to the amount of control of a driver;
• a work setting unit for providing a work mode and a target work surface setting function;
• a location information providing unit for, according to a work setting of the work setting unit, collecting and/or calculating location information of the work device and location information of a work surface that has been set;
• and
• an electronic control unit for calculating and outputting boom pilot pressure for the electronic proportional pressure reducing valve,
• wherein the electronic control unit controls the operation of the boom by using the control signal of the control lever and the location information collected and/or calculated by the location information providing unit,
• wherein the electronic control unit sets the location of the bucket end as a first point, the joint location of the boom and the arm as a second point, and an angle between a virtual straight line connecting the first point and the second point and the work surface as a boom control angle value,
• wherein the electronic control unit calculates the boom control angle value, and compares the calculated boom control angle value with the set reference value,
• wherein the electronic control unit determines the boom control angle value to be in boom-up control range and allows only boom-up movement in case the boom control angle value is smaller than the set reference value, and determines the boom control angle value to be in boom-down control range and allows only boom-down movement in case the boom control angle value is larger than the set reference value.