Printing Guide · Parametric Box Generator

Why use it

A useful enclosure without rebuilding a CAD model

Dimension-driven

Enter the space you need inside, or work from required outside dimensions. The generator keeps both views synchronized.

Private by design

Geometry is calculated in the browser. Your dimensions and exported files are not uploaded to a server.

Ready for real workflows

Use STL files directly in a slicer, or use native STEP solids when you want to add openings, mounts or other CAD features.

Support-free by design

Critical transitions and lid-guide details use printable slopes instead of unsupported horizontal overhangs, so both parts print without support material in their intended orientations.

What it does

Functions included in the generator

Switchable inner or outer length, width and height input
Synchronized sliders, direct number fields and calculated dimensions
Interactive 3D preview with an animated slide-on lid
Retaining edge, guided shoulder, end stop and screw lock
Optional 0.20 mm Heisel logo engraving on the inner floor
Geometry validation for separate, closed BOX and LID solids
Support-free geometry with print-friendly slopes at critical transitions
Individual BOX/LID STL and STEP downloads plus a complete STEP set

Workflow

From generator to printer

1
Choose the dimension mode
Use Inner for required usable space or Outer when the enclosure must fit a fixed footprint.
2
Set length, width and height
Type exact millimetre values or use the sliders. Wait until the status reads Model is ready.
3
Inspect the model
Rotate the preview and open the lid far enough to check the guide, stop and screw hole. Confirm that both solids are valid.
4
Download both STL files
Download BOX STL and LID STL separately. The assembled complete STEP set is intended for CAD editing and archiving, not as a print layout.
5
Place both parts separately
Import BOX and LID as two separate objects at 100% scale. Place each one individually on the build plate. They can sit side by side if space permits, but must never be stacked, intersecting or assembled.
6
Print, fit and assemble
Print the box and lid, install the M3 insert, slide the lid into its guide and secure it with the countersunk screw.

Recommended starting profile

FDM print settings

This guide uses Bambu Studio and a 0.4 mm nozzle. Select the exact Bambu Lab printer and filament presets first. The tables then identify every setting that must be changed or checked.

Bambu Studio baseline

Start with these three presets

PrinterYour exact Bambu Lab printer with 0.4 mm nozzle

FilamentBambu PETG HF, or the matching preset for your actual PETG

Process0.16 mm High Quality, or 0.12 mm Fine for maximum detail

Do not copy nozzle temperature, bed temperature, flow or speed from this page. Those values remain controlled by the selected Bambu filament and process presets.

Global process settings

Apply to BOX and LID

All differences marked

Bambu Studio setting	Value	Action
Strength / WallsWall loops	4	Change Bambu profiles use 2. Four loops improve the enclosure and screw-boss strength.
Strength / Top/bottom shellsBottom shell thickness	1.0 mm	Change This gives the box floor a defined minimum thickness at either layer height.
Strength / Top/bottom shellsTop shell thickness	1.0 mm	Check Already 1.0 mm in the 0.16 mm profile. Change it from 0.6 mm when using the 0.12 mm profile.
Strength / Sparse infillSparse infill pattern	Gyroid	Check Already Gyroid in the 0.16 mm High Quality profile. Change it when using 0.12 mm Fine.
Strength / Sparse infillSparse infill density	15%	Keep Increase to 20% only for unusually large or highly loaded enclosures.
SupportEnable support	Off	Keep The guide and shoulder transitions are sloped for support-free printing.
QualityInitial layer height	0.20 mm	Keep Leave the Bambu profile value unchanged.
Others / Bed adhesionBrim type	Auto	Keep For a tall box or difficult material, use Outer brim only with 5 to 8 mm brim width.
Quality / PrecisionXY contour and hole compensation	0.00 mm	Keep Do not compensate before checking a calibrated first print.
Object transformScale	100%	Keep Never scale BOX and LID differently.

No other process values are changed. Leave temperatures, cooling, flow ratio, line widths, speeds, acceleration, seam, wall order, ironing and every unlisted setting at the selected Bambu preset.

Print BOX and LID as two separate parts

Place each part individually on the build plate in the orientation shown below. They may print side by side, but they must not be printed assembled, stacked or intersecting.

BOX

Print on the closed bottom

Keep the open interior facing upward. This gives the largest bed contact and leaves the lid guide accessible.

LID

Print the broad underside down

Keep the countersink facing upward. Do not rotate the lid onto an edge and do not add automatic supports.

Fit comes before speed

The lid has a nominal clearance of 0.15 mm per side. Print at 100% scale and use calibrated flow. If the lid is tight, correct elephant foot or XY compensation in the slicer instead of scaling only one part. A small test print is recommended when changing printer, nozzle or material.

Design idea

Transparent lid with visible infill

A clear or translucent lid turns the internal structure into part of the design. The finished surface stays closed, while light reveals the selected infill pattern underneath.

Object-specific settings

Select LID in the Objects view

LID only

Bambu Studio setting	LID value	Action
Filament slot	Clear or translucent PETG	Select the slot containing the lid material.
Strength / Top/bottom shellsTop shell layers	2	Override for LID.
Strength / Top/bottom shellsTop shell thickness	0 mm	Override for LID so the layer count controls the skin.
Strength / Top/bottom shellsBottom shell layers	2	Override for LID.
Strength / Top/bottom shellsBottom shell thickness	0 mm	Override for LID so the layer count controls the skin.
Strength / Sparse infillSparse infill pattern	Grid	Override for a clearly visible geometric pattern.
Strength / Sparse infillSparse infill density	25%	Override for a visible pattern with useful support for the skins.

Only the values above differ for the transparent LID. It inherits the global 0.12 or 0.16 mm layer height, 4 wall loops, support off, 100% scale and every other Bambu preset value. Two-layer skins are a visual choice and are less robust than the standard 1.0 mm shell. When using Bambu PETG Translucent, dry it at 65 °C for 8 hours before printing. Preview the sliced layers before printing.

Finished-print effectThe pattern remains visible through the translucent outer skins.

One set per box

Threaded insert and screw

Threaded insert

1× M3 × 5.7 mm heat-set insert

Use the standard/long brass type intended for a Ø4.0 mm printed pilot hole. A typical compatible insert has an outside diameter around 4.6 mm.

Screw

1× M3 × 8 mm countersunk screw

Use a fully threaded 90° countersunk head to ISO 10642 / DIN 7991. Hex socket or Torx drive both work.

Matching dimensions already built into the model

Insert pilot: Ø4.0 × 6.7 mm deep
Lid through-hole: Ø3.2 mm
Countersink: 90°, 2.0 mm deep, Ø7.2 mm maximum

Do not buy by thread name alone. M3 heat-set inserts differ between manufacturers. Check that the insert data sheet explicitly calls for a 4.0 mm pilot and that its length does not exceed the 6.7 mm pocket.

Final assembly

Install the insert cleanly

Remove loose strings from the printed Ø4.0 mm pocket. Do not enlarge it unless a test insert proves that your printer made it undersized.
Fit an M3 heat-set tip to a temperature-controlled soldering iron. Follow the insert maker's instructions; a common starting point is the filament printing temperature plus 10–20 °C.
Place the insert on the pocket at the top of the screw boss and press it vertically with light, steady pressure. Do not force or twist it.
Stop when the insert is flush with the boss surface. Keep the tool still briefly, withdraw it vertically and let the plastic cool completely.
Slide the lid closed, insert the M3 × 8 mm countersunk screw and tighten it by hand only until the lid is retained.

References

From exact dimensions to a finished enclosure