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Preparing your model for 3D printing

Before you upload your model, it’s worth doing a few quick checks. Most print issues come from small problems that are easy to fix early.

1. Check your scale

Make sure your model is the correct size. Different programs use different units, so something designed in millimeters might import much larger or smaller than expected.

A good habit is to double-check key dimensions before exporting your file.

2. Make sure walls are thick enough

Thin walls are one of the most common issues. If a part is too thin, it may not print at all or will be very fragile.

As a general rule, aim for at least 1–1.2mm thickness for basic parts, and thicker for anything functional.

3. Avoid problematic overhangs

3D printers build layer by layer. Large overhangs without support can sag or fail.

Try to design parts so they sit flat, or avoid steep angles when possible. Splitting a model into multiple pieces can also help.

4. Check your model for errors

Your model should be a closed, solid shape. Problems like holes, missing faces, or overlapping geometry can cause issues when printing.

If your software has a “repair” or “solidify” tool, it’s worth running before export.

5. Choose the right material

Different materials behave differently:

• PLA is good for simple prints and display parts
• PETG is stronger and better for functional pieces
• ABS is more durable and impact-resistant

If you're unsure, starting with PLA is usually a safe choice.

6. Plan for how the part will be used

A printed part is not always identical to a machined or molded one. Think about how it will be used:

• Will it need strength?
• Does it need to fit with other parts?
• Will it be under stress or heat?

Common mistakes

• Wrong scale or units
• Walls that are too thin
• Ignoring overhangs
• Uploading broken geometry

Once your model looks good, upload it and check the quote. If there are any issues, you’ll usually catch them right away.