What is the Original Prusa MINI+'s build volume?
180 × 180 × 180 mm (about 7.1 × 7.1 × 7.1 inches).
Printer guides › Original Prusa MINI+
How to print models bigger than the Original Prusa MINI+
The Original Prusa MINI+ has a build volume of 180 × 180 × 180 mm. It's a reliable little printer, but a 180 mm cube fills up fast with busts, helmets and household parts.
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 168 × 168 × 168 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 180 × 180 × 180 bed
Free to split and preview, and your first model is free to download. The bed size is filled in for you.
Original Prusa MINI+ at a glance
Build volume180×180×180mm
Largest piece168×168×168mm
Example4pieces
Example: A 300 mm tall figure bust (200 × 160 × 300 mm) doesn't fit the MINI+. PrintSlice splits it 2 × 1 × 2 into 4 pieces of about 100 × 160 × 150 mm, each of which fits the bed.
How to split a model for the MINI+
- Open PrintSlice with the MINI+ bed size and drop in your STL file, or try the sample model.
- 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.
- 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 PrusaSlicer as normal.
Tips for splitting on the MINI+
Expect more seams than on an MK4
The bust in the example needs 4 pieces on the MINI+, against 2 pieces on an MK4. Every extra seam is another joint to glue and sand, so check the piece count before you print.
Move a seam that lands badly
PrintSlice spaces its cuts evenly, so you don't pick where they fall. If a seam lands somewhere awkward, like across a face, scaling the model slightly or rotating it before splitting moves the cut.
Hide the seams before painting
On PLA, glue the pieces, fill the joint line with filler primer or a little body filler, then sand. The connectors keep everything aligned while the glue sets.
Questions
What's the largest single piece PrintSlice makes for the MINI+?
With default settings, 168 × 168 × 168 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 PrusaSlicer?
PrusaSlicer'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.