3D printing · workflow decisions
Your model is bigger than your print bed. What next?
Split the model while preserving its intended size. Choose a free slicer cut for a straightforward job, or an editable Blender workflow when your project needs repeated cut changes.
Affiliate disclosure: The CatPin link below is a paid affiliate link. We may earn a 10% commission on eligible purchases through Gumroad. We have reviewed the publisher's documentation, but have not purchased or tested CatPin. The free alternative has no affiliate link.
Start free: a simple cut in PrusaSlicer
If the model needs a straightforward split and alignment connectors, try the free, open-source PrusaSlicer first. Its Cut tool supports connectors with adjustable size and tolerances. You may already have the tool you need.
- Import the model and confirm its units and overall dimensions.
- Select the Cut tool and place the cut where the seam will be accessible for assembly.
- Add alignment connectors if needed, then adjust their dimensions and tolerances.
- Check each resulting part on the print bed, including space needed for supports or a brim.
- Test a small connector pair with the intended material and settings before printing all parts.
Read Prusa's official Cut tool instructions · Get PrusaSlicer from Prusa · Open-source repository
Consider CatPin for editable cuts inside Blender
CatPin is a paid Blender add-on for artists preparing large figures, props and other printable models. According to its publisher, Draft Mode keeps cuts editable before building the final parts, with straight or curved cuts and control over connector placement. It exports STL, OBJ and FBX parts.
This is worth evaluating when you already work in Blender and repeatedly revise cut locations or connector positions. For one uncomplicated split, try the free workflow above before paying.
Check these requirements before buying
- The publisher lists Blender 4.2–5.2 on Windows, Linux and Mac, with an English interface. Confirm your exact version on the current product page.
- Closed manifold meshes are required. Open or broken meshes are unsupported.
- Apply scale and rotation; the publisher recommends a millimeter-based scene workflow.
- Clearance needs calibration for your printer and material. The add-on does not automatically validate printability, wall thickness or structural strength.
- Some connection types are currently unavailable. Read the live limitations and watch the official tutorial before purchase.
Paid affiliate link. Price, discounts, taxes and compatibility can change; confirm them at checkout. We do not sell or provide support for this third-party add-on.
Plan the joint before the cut
For a decorative figure, a seam hidden along clothing may be easier to finish than one across a face. For a load-bearing part, joint placement and strength require a separate design decision: fitting on the bed does not prove the assembled part will be strong enough.
For example, a 320 mm prop cannot remain a single straight 320 mm piece along a 220 mm bed axis. Splitting it into two shorter pieces may help, but each part still needs an orientation, supports and connector geometry that fit. Check the actual sliced parts rather than dividing the overall length by two.
Before the full print
- Confirm assembled dimensions and part labels.
- Inspect the seam and connector geometry in the exported files.
- Slice every part and review supports, orientation and bed clearance.
- Print a small fit test. Adjust clearance from the observed result.
Sources and scope
This guide compares documented workflows; it is not a hands-on product review. CatPin feature and compatibility statements come from the publisher's product description. The free workflow is based on Prusa's Cut tool documentation. No tool can guarantee a successful print for every model.