Common mistakes when exporting FDM 3D models often involve file compatibility, poor orientation, and incorrect support settings. - **File compatibility**: Non-watertight STL files or unsupported formats confuse slicers, leading to print errors. - **Orientation**: Printing large overhangs without adjusting to a <45° angle causes warping or layer shifts. - **Supports**: Too few supports risk collapse; too many waste material and leave hard-to-remove residue. Before exporting, use slicer tools to fix mesh issues, preview orientation, and test supports—this avoids most common failures.
