FDM builds parts from extruded filament, while SLA uses light to cure liquid resin. Compare material choices, print volume, support handling, post-processing, software, and the exact printer's published limits.
FDM and SLA refer to different 3D printing processes and materials. The printer, material, part design, and finishing workflow all affect the production plan.
Compare the workflows
| Detail | FDM | SLA |
|---|---|---|
| Material form | Filament | Liquid resin |
| Process | Deposits melted filament in layers | Uses light to cure resin in layers |
| Build limits | Check the printer’s X, Y, and Z build dimensions | Check the printer’s build dimensions and resin compatibility |
| Supports | Check how the slicer creates and removes supports | Check support layout and the maker’s removal process |
| Post-processing | Check support removal and any surface finishing | Check washing, curing, and material handling requirements |
| Materials | Compare compatible filament types and profiles | Compare compatible resin types and profiles |
| Operating requirements | Check the printer’s enclosure, ventilation, power, and maintenance instructions | Check resin handling, ventilation, washing, curing, power, and maintenance instructions |
Formlabs’ technology comparison describes FDM as filament extrusion and SLA as a resin-based process. Its design guidance also notes that detail and dimensional outcomes vary by printer, material, and process settings.
Choose by the part and workflow
- Record part dimensions and the smallest features to produce.
- Identify the materials and material properties required by the design.
- Compare build volume, layer settings, support requirements, and finishing steps for specific machines.
- Review material compatibility and handling instructions from the printer maker.
- Include wash, cure, drying, support removal, and storage equipment in the workflow where required.
- Compare software, replacement parts, service, and total installation space.
If the project includes automated transport, use the palletizing robot cell checklist. For subtractive production, compare a CNC router and CNC mill. Browse fabrication systems.
Read the material documentation
Material names do not create compatibility between printers. Follow the exact printer and material manufacturer’s specifications, handling directions, and current process documentation.
Sources
Common questions
Do FDM and SLA printers use the same materials?
No. FDM printers use compatible filament, while SLA printers use compatible resin. Check the printer and material maker's compatibility lists.
Does every resin printer use the same resin?
No. Material compatibility is model- and process-specific. Use the printer maker's material chart.
Can I compare print detail using only the process name?
No. Compare the specific printer, material, orientation, settings, and design requirements.