Method and apparatus for manufacturing an object by means of additive manufacturing

An apparatus for producing an object by additive manufacturing layer by layer in a layer sequence, the apparatus comprising:

• a process chamber for receiving a bath of powdered material configured to be solidified;
• a support for positioning the object in relation to a surface level of the bath of powdered material;
• a solidifying device for solidifying a selective layer-part of the powdered material;
• and
• a control unit configured for adjusting for individual layers in the layer sequence, a setting of at least one process parameter, during the manufacture of the object, wherein the at least one process parameter is chosen from the group consisting of:
• a temperature of a gas present in the process chamber;
• a flow rate and/or a flow speed of the gas present in the process chamber;
• a relative humidity of the gas present in the process chamber;
• a pressure in the process chamber;
• an oxygen level in the process chamber;
• a flow of a gas through the process chamber;
• a temperature of the bath of powdered material;
• a temperature of a build plate supporting the layer sequence at a lower side thereof;
• a speed at which a surface level of an individual layer in the layer sequence is leveled;
• a number of swipes for supplying an individual layer in the layer sequence;
• a quantity of powdered material used for providing an individual layer in the layer sequence;
• a number of successive layers after which a powdered material reservoir of the apparatus needs to be refilled with powdered material;
• an extraction rate of extracting a mixture of the gas and waste particles from the process chamber;
• a filtering rate of filtering the mixture of the gas and waste particles from the process chamber;
• and
• an alignment accuracy of the solidifying device for solidifying the selective layer-part of the powdered material for manufacturing the object.