Systems and methods of post-processing features for additive fabrication

Abstract

According to some aspects, a method of additive fabrication wherein a plurality of layers of material are formed on a build platform is provided. The method comprises forming a raft structure in contact with the build platform, the raft structure formed from one or more layers of material and comprising at least one removal pocket adjacent to the build platform and forming additional material in contact with the raft structure. According to some aspects, an additive fabrication apparatus configured to form a plurality of layers of material on a build platform is provided. The apparatus comprises the build platform, and at least one controller configured to form a raft structure in contact with the build platform, the raft structure formed from one or more layers of material and comprising at least one removal pocket adjacent to the build platform, and form additional material in contact with the raft structure.

What is claimed is: 
     
         1 . (canceled) 
     
     
         2 . At least one non-transitory computer readable medium comprising instructions that, when executed by at least one processor, perform a method of configuring an additive fabrication device to fabricate a part, the method comprising:
 obtaining a first three-dimensional model representing a part to be fabricated by the additive fabrication device;   generating, using the at least one processor, a second three-dimensional model by incorporating at least part of a three-dimensional model of an auxiliary structure into the three-dimensional model representing the part to be fabricated, wherein the auxiliary structure comprises one or more shapes that convey identifying information to a user that identifies the part to be fabricated as being distinct from other parts; and   generating, using the at least one processor, instructions that, when executed by the additive fabrication device, cause the additive fabrication device to fabricate the part and the auxiliary structure as a first object according to the second three-dimensional model.   
     
     
         3 . The at least one non-transitory computer readable medium of  claim 2 , wherein incorporating the at least part of the three-dimensional model of the auxiliary structure into the three-dimensional model representing the part to be fabricated comprises inserting the three-dimensional model of the auxiliary structure into the three-dimensional model representing the part to be fabricated. 
     
     
         4 . The at least one non-transitory computer readable medium of  claim 2 , wherein incorporating the at least part of the three-dimensional model of the auxiliary structure into the three-dimensional model representing the part to be fabricated comprises a Boolean union operation between the three-dimensional model representing the part to be fabricated and the three-dimensional model of the auxiliary structure. 
     
     
         5 . The at least one non-transitory computer readable medium of  claim 2 , wherein the auxiliary structure comprises a grip structure. 
     
     
         6 . The at least one non-transitory computer readable medium of  claim 2 , wherein the one or more shapes of the auxiliary structure convey identifying information via the location and/or size of the shapes. 
     
     
         7 . The at least one non-transitory computer readable medium of  claim 2 ,
 wherein the part is a first part,   wherein the generated instructions also, when executed by the additive fabrication device, cause the additive fabrication device to fabricate a second part together with the first part and the auxiliary structure, the second part having a different shape than the first part, and   wherein the one or more shapes of the auxiliary structure indicate that the first object comprises the first part and not the second part.