Help & Getting Started
Everything you need to know about submitting models and preparing for SLA printing.
File Requirements
STL files only
We accept .stl files (binary or ASCII). Most 3D modeling software can export to STL — including Fusion 360, SolidWorks, Blender, and TinkerCAD.
Max build volume: 145 × 145 × 185 mm
Models exceeding the build plate will not fit on any run. Keep models within these bounds for best results.
Check Your Model with PreForm
Before submitting, we recommend checking your model in PreForm — free software from Formlabs for preparing SLA prints. It will verify your model is printable and show you where supports may be needed.
Download PreFormSLA Printing Tips
Wall thickness
Minimum recommended wall thickness is 0.5 mm. Thinner walls may not print reliably.
Overhangs & supports
SLA handles overhangs better than FDM, but steep angles (over 45°) may still need supports. PreForm can auto-generate these for you.
Hollowing
For large solid models, consider hollowing to reduce resin usage and cost. Add drain holes (2–3 mm diameter) if you hollow your model.
Detail resolution
Our Form 3 can resolve features as small as 0.15 mm. Fine text and intricate details print beautifully in SLA.
Orientation matters
Taller models take longer to print. PreForm can suggest optimal orientation to balance quality and speed.
What You'll Receive
Parts include support structures
All parts are delivered with SLA support structures still attached. You will need to remove supports and do any post-processing (sanding, curing) yourself. This is standard for SLA printing and gives you full control over the finish quality.
Learn More
In-depth guides from Formlabs on preparing models for SLA printing:
→ Guide to SLA 3D Printing→ How to Prepare 3D Files for Printing→ Model Design Specifications