Convert EASM to 3D

A 3D printer, slicer, CAD system, or visualization tool may reject an .easm file because it is designed for eDrawings viewing rather than general 3D exchange. Convert it to STL for printing and mesh inspection, or request a STEP export when accurate CAD geometry is required.

What the EASM format is

.easm is a SolidWorks eDrawings assembly file. It contains a compact representation of an assembly for viewing, measurements, exploded views, sectioning, animations, and markups, rather than the original parametric design.

SolidWorks and eDrawings Publisher can create EASM files, which are commonly distributed for engineering reviews, supplier previews, email attachments, and CAD-portal downloads. An EASM file normally does not contain editable feature history, sketches, constraints, mates, materials, or the complete component files from the original assembly.

Choose the required 3D format

3D is not a file format, so the recipient must specify an extension and its intended use.

• STL stores a triangular surface mesh for 3D printing, slicing, and basic inspection. It does not preserve parametric features, assembly relationships, and usually not colors or component names.
• 3MF can preserve more printing information than STL, including units and, depending on the workflow, materials and multiple objects. EASM applications commonly export STL rather than 3MF; convert the STL to 3MF in a compatible slicer when needed.
• OBJ stores polygon geometry and can reference materials and textures. It is more suitable than STL for some rendering and general 3D applications, but it is not a CAD solid format.
• STEP is the usual target for exchanging solid and surface CAD geometry. IGES is an older exchange format used mainly for surfaces. Neither can recover the missing parametric history from an EASM file.

Convert EASM to STL

1. Install eDrawings Professional and open the EASM file. The free eDrawings Viewer is primarily for viewing and may not expose geometry export; availability also depends on the installed version and license.
2. Check that every required component is visible. Hidden, suppressed, excluded, or clipped components may not appear in the exported mesh.
3. Choose File → Save As and select STL (*.stl) if the command is available.
4. Set the output units and mesh accuracy. Use finer deviation and angle settings for curved or small components, but avoid unnecessarily fine tessellation that creates a very large file.
5. Open the STL in a slicer such as PrusaSlicer, UltiMaker Cura, or Bambu Studio. Confirm its scale, orientation, watertight status, and shell count before printing; repair non-manifold edges or inverted normals when the slicer reports them.

For a SolidWorks assembly, the preferred workflow is to obtain the original .SLDASM and referenced .SLDPRT files. Open the assembly in SolidWorks, check component visibility and display states, then use File → Save As for STL or File → Print3D. This provides more control than exporting the published EASM tessellation.

Convert EASM to STEP, IGES, OBJ, or another format

For STEP or IGES, request the source assembly or a neutral CAD export from the file owner. In SolidWorks, open the source assembly and use File → Save As, selecting STEP (*.step; *.stp) or IGES (*.igs; *.iges). This preserves usable solid or surface geometry, but still does not preserve native SolidWorks feature history.

For OBJ or another polygon format, first export STL from eDrawings Professional, then convert the mesh with a desktop tool that supports the required output. MeshLab and Blender can import STL and export several polygon formats, but they cannot recreate CAD solids or parametric features.

Online CAD services such as CAD Exchanger Cloud may support EASM conversion, but confirm that .easm is listed as an input format before uploading. Online-Convert and similar general file converters typically support common mesh files, not proprietary eDrawings assemblies. Do not upload confidential engineering data unless company and supplier policies permit cloud processing.

Quality and compatibility limits

Exporting an EASM to STL is generally a tessellation-to-mesh operation. Low-resolution source publishing can produce visibly faceted curves, gaps, duplicate faces, disconnected shells, or incorrect normals. A mesh repair step cannot restore surfaces or dimensions that were never included in the EASM.

STL has no universally enforced unit field. Verify the intended units in the receiving application; interpreting a millimetre model as inches makes it 25.4 times too large. An assembly exported as one STL may also lose individual part identity, colors, names, exploded positions, mates, and metadata. Export or request separate part files when the recipient needs independent components.

For manufacturing, dimensional inspection, editing, or downstream CAD work, an EASM is insufficient. Obtain the original SolidWorks files or a STEP export from the design owner.