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How to print models bigger than the Bambu Lab P1S

The Bambu Lab P1S has a build volume of 256 × 256 × 256 mm. Its enclosure makes it a favourite for large functional parts, which is exactly where models outgrow the bed.

To print something larger, split the STL into pieces that fit and join them after printing. PrintSlice does the splitting in your browser: with default settings each piece is at most 244 × 244 × 244 mm, and you can add pin, key or dovetail connectors on the cut faces so the pieces line up and snap together.

Open PrintSlice with a 256 × 256 × 256 bed

Free to split and preview, and your first model is free to download. The bed size is filled in for you.

Bed 256 × 256 mm420 mm300 mm
A large electronics enclosure, 420 × 300 × 150 mm4 pieces on the P1S

Bambu Lab P1S at a glance

Build volume256×256×256mm
Largest piece244×244×244mm
Example4pieces

Example: A large electronics enclosure (420 × 300 × 150 mm) doesn't fit the P1S. PrintSlice splits it 2 × 2 × 1 into 4 pieces of about 210 × 150 × 150 mm, each of which fits the bed.

The P1P and X1 Carbon share the same 256 mm bed, so everything on this page applies to them too.

How to split a model for the P1S

  1. Open PrintSlice with the P1S bed size and drop in your STL file, or try the sample model.
  2. Press Split into bed-sized pieces. PrintSlice works out the smallest grid of equal pieces that fits, cutting along all three axes if it needs to.
  3. Open a piece's preview and click a cut face to add a key, pin or dovetail connector. Then download the pieces and slice them in Bambu Studio as normal.

Tips for splitting on the P1S

ABS and ASA for big functional parts

The enclosed P1S keeps warm air around the print, which makes ABS and ASA practical for enclosures, car parts and outdoor fittings. These shrink a little more than PLA as they cool, so if a joint comes out tight, try 0.3 mm clearance.

Glue the seams for strength

ABS and ASA pieces can be welded with a little acetone; PLA and PETG are best joined with CA glue or epoxy. The connectors hold the pieces in line while it sets.

Height is split too

PrintSlice cuts on all three axes, so a tall model is only split into stacked sections when it's taller than the usable 244 mm. Shorter models keep their full height in one piece.

Questions

What is the Bambu Lab P1S's build volume?

256 × 256 × 256 mm (about 10.1 × 10.1 × 10.1 inches). The P1P and X1 Carbon share the same 256 mm bed, so everything on this page applies to them too.

What's the largest single piece PrintSlice makes for the P1S?

With default settings, 244 × 244 × 244 mm. PrintSlice keeps 5.6 mm clear on every side: a 2 mm safety margin you can change, plus 3.6 mm so connector tabs still fit on the bed.

Can't I just split the model in Bambu Studio?

Bambu Studio's cut tool is fine for one or two cuts you place by hand. PrintSlice is quicker when a model needs several: it works out every cut from your bed size, splits along all three axes in one go, and adds key, pin or dovetail connectors on the seams.

Will the printed pieces fit back together?

Yes. Each tab and socket pair is made from the same shape with a small built-in clearance (0.2 mm by default, adjustable per connector), so the pieces push together without sanding. You can choose a rectangular key, a round pin or a dovetail, which resists being pulled apart.

Is my model uploaded anywhere?

No. The splitting, connectors and 3D preview all run in your browser, so your STL file never leaves your computer.

Does PrintSlice cost anything?

Splitting and previewing is free, with no account needed, and your first model is free to download with a free account. To download more models, start a 7-day free trial (a card is needed, but you aren't charged until the 7 days are up and you can cancel before then). After that it's £3.99 a month.

Does this work for the Bambu Lab P1P and X1 Carbon?

Yes. Both have the same 256 × 256 × 256 mm build volume as the P1S, so use the same bed size.

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