The preparation of the 3D file is a fundamental step that will guarantee the correct impression of your object. If you wish to model your object yourself, you will find below some simple rules to follow to avoid any problem (we also offer a 3D modeling service).
Regardless of the complexity of your object, you must merge all volumes into one closed volume. For the assembly of several objects, this is called a Boolean union. No need to make groups of multiple objects, or components, it is necessary that the object is made of a single outer surface, even complex. If you work in mesh / meshes, you need only one mesh.
According to your modeling software, you must export your object in an ASCII mode .stl file (and no-binary). The .stl ASCII mode file is the universal format for 3D printing, which guarantees 100% compatibility with machines. The binary format is not recommended: it is a compressed version, which often presents problems of interpretation.
We recommend our customers to not go below 1mm in all directions.
Our machines have a maximum size of 200 x 200 x height 200 mm in FDM (PLA, ASA, PVA, TPU...). In resin SLA, our size limit is 190 x 120 x height 200 mm. This must be taken into account when preparing your files: for larger parts, they must be broken down into several parts that respect the templates. It is possible to assemble them into a single object after printing.
When you have multiple objects in the same 3D .stl file, make sure to position them all on the O level of the z axis. If an object is higher for example, unnecessary media will be printed by the machine to compensate the altimetry.