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  • The CASTOR team

Everything you need to know about CASTOR 3D printing software - FAQ

Updated: Jan 19

We have gathered here for you the main questions and answers about CASTOR's product and service.


1. What types of files does CASTOR support? (Are files uploaded as an assembly?) XT, STEP (Single file for a full assembly). A collection of STL files representing single parts are also accepted.

2. What is the Maximum file size? CASTOR has no file size limitations (well, It affects the processing time though). We accept up to 100 different parts during the free trial period.

3. What is the typical time it would take to obtain results after an upload? That depends on the number of parts uploaded. In general- between 5 minutes and 48 hours.

4. How is the model’s price calculated? We estimate cost, not price. Meaning we evaluate the COGS of the part in 3D printing. The pricing might be different, including the Service Bureau margins, during the quotation phase. The estimation takes into consideration the material cost, the printing time, man hours for operating the printer, support removal process, and more.


5. Does CASTORs software fix STL files? (bad edges, open boundaries, flipped faces, duplicated faces, small components, self-intersections) As for now, no. There are several tools that can accomplish this . We offer a Heat-Map that tells you where the problem might be in case of a thin walls failure. We also indicate the problem when it comes to the file itself, for example in the case where the CAD file is not water-tight closed. Feel free to contact us if you would like more tips on how to fix your CAD files.

6. What criteria does the software utilize to check printability? (printing volume, wall thickness, gap clearance, interlocked/enclosed parts, voids, material removal hole, collisions, geometry defects, etc).

The algorithm is derived from 3 main blocks- Printability check, Material comparison, and cost estimation.

As for the printability check we check whether the part can fit into a printing tray (or if it is too small to be cost effective in 3DP), Whether the parts wall thickness is adequate for the chosen printer, as for the file itself we check:

● Water-tightness (holes)

● Self-intersection and collision

● Normal direction and polygons count

● Flatness (Not 3D part)

7. How does the software suggest changes for part consolidation? What additional information is needed by the user other than the uploaded files? (part specific material/tolerance information)

The algorithm looks on a full machine BOM, the full assembly, to see the full picture. In addition, we consider the original material that was chosen by the mechanical engineer (Material Properties list, out of the CAD software).

We might suggest consolidation of non-moving parts, made from the same material, that have connections between them using screws, with no special requirements on the tolerances between them (under 0.1mm gap).

In some cases, CASTOR suggestions can provide the designing engineer an additional point of view, for saving costs using 3D printing.


8. What are the supported processes and technologies? (Stratasys FDM, 3D Systems SLS, etc…)

Our database is being updated continuously. In general, the recommendations are chosen from the leading technologies of industrial 3D printing

9. Are you in partnership with any service bureau?

Yes. We have contracts with service bureaus that own the leading 3D printing technologies. The service bureaus are located in Israel, Germany, and USA.