Numerical control device, additive manufacturing apparatus, and method for controlling additive manufacturing apparatus

An additive manufacturing apparatus for manufacturing a modeled object by applying a material molten by irradiation with a beam to a workpiece, the additive manufacturing apparatus comprising:

• a motor configured to generate a driving force for feeding the material from a supply source of the material;
• an error detector configured to detect an error in height of the workpiece in a height direction in which the material is deposited;
• and
• an adjuster configured to adjust a supply amount of the material on a basis of the error, wherein
• the error detector is configured to detect the error by estimating the height of the workpiece on a basis of a contact state of the material with the workpiece.

A method for controlling an additive manufacturing apparatus by a numerical control device, the additive manufacturing apparatus manufacturing a modeled object by irradiating a material fed by a driving force of a motor with a beam and applying the material being molten to a workpiece, the method comprising:

• detecting an error in height of the workpiece in a height direction in which the material is deposited;
• and
• adjusting a supply amount of the material on a basis of the error, wherein
• the error is detected by estimation of the height of the workpiece on a basis of a contact state of the material with the workpiece.