3D printing file preparation guide
3D printing file checklist for Singapore
If you already have a 3D model and want to print it in Singapore, run this short preflight before sending it: confirm the final size, make sure the mesh is a closed solid, check thin walls and small features against FDM limits, note any fit or load requirement, and flag overhangs or parts that need support. Also confirm you have permission to commission the file. PrintYa accepts exactly one STL, 3MF or OBJ file up to 50 MB, within a 256 × 256 × 256 mm model envelope. A person reviews it and aims to reply within one business day; nothing is charged or printed until you approve the Final Quote. The public form asks for the model file, not a pre-sliced job.
This guide is for Singapore readers with an existing model, not for designing a new part. If you are ready to hand over a file, read the service information and then send one file for a quote. For the difference between accepted formats, see the STL vs 3MF vs OBJ guide.
Key takeaways
- Geometry matters more than the extension. An STL, 3MF or OBJ can still be the wrong size, contain open surfaces or have details too small for the receiving process.
- Give the reviewer the physical brief. Intended use, critical dimensions, fit, load direction and environment are more useful than a filename alone.
- Reference numbers are not promises. Nozzle, extrusion width, layer height, orientation and support settings change what a particular geometry can do.
- PrintYa keeps the handoff narrow. One accepted model file, PLA only, a manual quote, and no charge or printing before Final Quote approval.
The 8-point file checklist
| Check | Confirm before sending | What to explain |
|---|---|---|
| 1. File and permission | One STL, 3MF or OBJ file, no larger than 50 MB, and permission to have it printed. | Say if the file came from your own design, a licensed download or another source with specific terms. |
| 2. Finished size | Inspect the exported X, Y and Z dimensions and keep the model within 256 × 256 × 256 mm. | Give the finished size and any dimension that must be exact for a fit. |
| 3. Solid geometry | Look for holes, loose shells, flipped faces, zero-thickness surfaces or accidental internal geometry. | Mention if the file came from a scan, conversion or repair and whether any area is uncertain. |
| 4. Walls and details | Check thin walls, embossed text, pins and small holes against the intended nozzle and profile. | Identify the features that must survive; do not treat a generic minimum as a PrintYa guarantee. |
| 5. Fit and clearance | Measure the mating part, opening, shaft, slot or moving gap instead of relying on a screenshot. | Describe what the print must connect to and how much movement or friction is acceptable. |
| 6. Load direction | Decide whether the item is decorative, clipped, pulled, bent, screwed, stacked or load-bearing. | Tell the reviewer which direction the force acts and whether failure could create a safety problem. |
| 7. Orientation and supports | Look for long overhangs, islands, bridges and visible faces that may receive support. | Say which face should look best or which surface must stay clean; the reviewer can assess orientation. |
| 8. Environment and timing | Check indoor/outdoor exposure, sun, hot surfaces, food contact and the date you need the part. | Use the notes for the use case; colour, quantity, fulfilment and timing are confirmed before the Final Quote. |
1. Check the exported size, not just the design view
A model can look correct in CAD and still arrive at the wrong physical size after export. Open the exact STL, 3MF or OBJ you plan to send in a viewer or slicer, then inspect its X, Y and Z dimensions. This is especially important for an STL: the file-format guide explains why STL coordinates do not label themselves as millimetres or inches.
For a PrintYa enquiry, check both limits: the upload is one file up to 50 MB, and the model must fit within a maximum 256 × 256 × 256 mm envelope. If a single dimension is over the limit, do not assume that splitting the model or joining parts later is included. Mention the requirement before treating the file as a normal one-file request.
2. Check that the mesh is a closed solid
“Manifold” or “watertight” means the surface describes a solid that can exist in the physical world: there are no unintended holes, loose faces or ambiguous inside/outside surfaces. Prusa’s modelling guidance warns that a model with holes or internal geometry may not slice as intended. A repair tool can be useful, but repairing a mesh can also change edges, openings or small details.
Do a visual pass from several angles. Look for floating triangles, a missing cap on a cylinder, surfaces that disappear when viewed from the back, and internal faces that should not be there. If the model came from a scan or a downloaded conversion, say so in the notes. That context helps a reviewer know where a strange edge or thin area may have come from.
3. Check walls and small features against FDM limits
FDM does not draw an infinitely thin line. A wall that looks substantial on screen may be smaller than the extrusion path used by the receiving printer. Prusa gives a useful reference for a common 0.4 mm nozzle: its example extrusion width is 0.45 mm, so one perimeter is approximately 0.45 mm, two are approximately 0.9 mm, three are approximately 1.35 mm and four are approximately 1.8 mm. Prusa also notes that these figures vary with slicer settings.
| Reference | Published number | How to use it |
|---|---|---|
| Prusa example nozzle | 0.4 mm | Use it as a reminder that small features must be designed around a real extrusion width, not a screen pixel. |
| Prusa example extrusion width | 0.45 mm | One perimeter is about 0.45 mm; two are about 0.9 mm. These are approximations, not a universal minimum. |
| UltiMaker guidance | 0.5 mm minimum wall; 0.06 mm minimum feature height on its stated machines | Shows why the receiving printer and profile matter. Do not copy this as a PrintYa specification. |
Pay special attention to pins, hooks, embossed lettering, living hinges, thin ribs and the base of a cantilever. If a feature is important, include its intended measurement and purpose. The useful question is not “is this file valid?” but “will this feature be recognisable, strong enough and usable after printing?”
4. Describe fit, load, heat and contact
A model is not ready just because it opens without an error. A decorative figurine, a drawer label and a replacement clip have different consequences when a dimension is off by a small amount. Write the physical brief beside the file so the person reviewing it can judge the right risks.
| Use case | Include in the notes | Why the distinction matters |
|---|---|---|
| Display or gift | Finished size, visible face, colour preference and whether small text is important. | Appearance may matter more than load, but tiny features can still disappear. |
| Clip, bracket or organiser | Mating measurements, movement, load direction and whether the part stays indoors. | Fit and layer direction can matter more than a visually perfect surface. |
| Replacement part | Exact appliance or object model, original measurements and what the original part did. | A downloaded file is a starting point, not proof that it fits your specific item. |
| Near heat, sun or food | Temperature exposure, direct sunlight, steam, hot surfaces, cleaning and contact details. | Read the separate PLA and Singapore heat guide or food-contact guide before assuming PLA is suitable. |
PrintYa is a PLA-only beta. A quote confirms the manually reviewed scope and price; it is not a certification that a part is safe for a particular load, appliance, temperature or food-contact use. If failure could affect safety, use the original part or qualified repair support where appropriate.
5. Think about orientation and supports
FDM builds a part layer by layer, so orientation changes more than the look of the top surface. It can change the direction in which the part is strongest, where supports touch, how long the job takes and which faces need cleanup. UltiMaker describes orientation as a design decision that affects text, snap features, overhangs, support and surface finish; Prusa likewise recommends changing orientation or splitting a model to reduce support where possible.
| Shape to notice | Useful starting rule | What not to assume |
|---|---|---|
| Sloped overhang | UltiMaker gives 45° as a general FDM self-supporting reference. | It is not a universal cutoff: cooling, layer height, material and orientation change the result. |
| Bridge | UltiMaker gives 10 mm as a general rule for many basic filaments. | A bridge can still sag or fail, and a different profile may behave differently. |
| Critical face | Place the face where it needs the cleanest surface and tell the reviewer. | Support removal can leave marks; a flat screen preview is not a finish guarantee. |
You do not need to guess the final support settings to request a quote. If you know that a particular face must remain clean, a hook must carry a load, or text must be legible from one direction, write that down. It is much more useful than uploading a file with no context and hoping the orientation is obvious.
6. Write a two-line brief beside the file
A concise note turns a generic upload into a reviewable job. For example:
Example note: “Light-duty cable clip for a shaded indoor study. The 12.0 mm opening must fit over a 3.0 mm desk edge; it should flex once during installation, with no food contact or heat exposure. Please keep the front face clean. One piece; colour and collection details can be confirmed in the follow-up.”
Those numbers are only an example. Replace them with measurements taken from the real object, not a guess from a product photo. If the part is a replacement, include the appliance or accessory model. If the file came from a model library, check the creator’s current licence and keep the file within the permission you actually have.
7. Send the file and know what happens next
- Choose the final file. Send exactly one STL, 3MF or OBJ file under 50 MB and within the 256 × 256 × 256 mm envelope.
- Add the physical brief. Use the optional notes for intended use, critical dimensions, fit, load, heat and appearance questions.
- Submit the enquiry. The form asks for the file, your name, a selected reply contact and optional notes.
- Wait for manual review. PrintYa aims to reply within one business day with the price and next steps.
- Decide after the Final Quote. Nothing is charged or printed until you approve the manually confirmed quote. Accepted single-part prints typically take 2–4 business days after verified payment; unusual work receives a confirmed date.
The file checklist helps the handoff, but it cannot remove uncertainty from a real physical object. If a model needs redesign, a different material or a safety-critical fit, raise that before approval instead of treating a successful upload as a promise that the part will work.
Frequently asked questions
What should I check before sending a 3D printing file?
Check the final X, Y and Z dimensions, confirm the file is one accepted STL, 3MF or OBJ under 50 MB, make sure the mesh is a closed solid, look for thin walls and tiny features, and write down any fit, load, heat or surface requirements. Also confirm that you have permission to commission the file.
Does my STL need to be watertight for 3D printing?
A printable solid should have closed, manifold geometry rather than holes, loose surfaces or accidental internal geometry. A slicer may try to repair some problems, but you should not assume the repaired result preserves the shape you intended. Check the exported file in a viewer or slicer before sending it.
How thick should a wall be for an FDM 3D print?
There is no single wall thickness that fits every FDM process. Prusa gives an example based on a 0.4 mm nozzle and 0.45 mm extrusion width: one perimeter is about 0.45 mm and two are about 0.9 mm. Those are approximations, not PrintYa settings or a guarantee for every feature.
Do I need to orient or slice my model before sending it to PrintYa?
No pre-sliced job is required by the public form: send one STL, 3MF or OBJ model file. Orientation still matters because it changes strength, overhangs, support and surface finish. If a particular face must look clean or a load must run in a certain direction, explain that in the notes.
What details should I include in a 3D printing quote request?
Give the intended use, finished size or critical dimensions, what the part must connect to, the direction of any load, and any heat, sunlight, food-contact or appearance concern. Quantity, PLA colour, collection or courier and timing can be confirmed in the follow-up conversation before the Final Quote.
What if my model is larger than 256 mm?
A model outside 256 × 256 × 256 mm is outside PrintYa's public model envelope. Do not assume that splitting or assembly is included in the beta; mention the requirement in a message first or use a file that fits the published limit.
Can PrintYa repair an unprintable file?
Do not assume that file repair or redesign is included. You can send the file for a manual suitability review and explain what you are unsure about, but PrintYa may ask for clarification or decline a file that is unsafe, unsuitable or outside the service boundary. Nothing is charged until you approve a Final Quote.
Last updated 30 August 2026. Sources checked on that date: Prusa's modelling guidance, its layers and perimeters guidance, its support-material guidance, and UltiMaker's FFF design guide. The published dimensions and timing on this page are PrintYa service boundaries; the nozzle, wall, overhang and bridge numbers are general examples from the linked manufacturers, not PrintYa specifications or guarantees. Check the current source and the actual use case before relying on a dimension or material decision.