How to choose strong print settings for home repair fixers

Q: Is LunarWerx 3D Print free to use?

The tools are free to use. The tools run in a web browser and you use them on a website hosted on Cloudflare. Check the site itself for anything beyond these points before you rely on it for a specific repair.

A practical guide for home repair fixers to choose print settings, with steps, tools that can help and mistakes to avoid.

By TexHouse · 2026-10-21

TexHouse is published by the makers of LunarWerx 3D Print, Vector3D and MeshyDL, which are compared here alongside other tools.

Start from the load the part must carry, then choose the direction, walls, infill and layer height, and check each choice with a small test print before you print the full part.

Option	What it does	Fee
LunarWerx 3D Print	Browser tools that work out ironing settings, check parts for injection moulding and design 3D-printable foam inserts ^[1]	Free to use ^[1]
Your slicer's own settings	This page has no source describing what it does; check its documentation	Not published

What you need before you start

Before you choose print settings for a repair part, have a clear picture of the job. Know what the part has to hold, what it has to fit against, and what it will face, such as heat, water or repeated handling. Keep the broken part or a careful measurement of the space it goes into, because a print that is slightly off will not fit.

Keep a note of the printer you have and the filament you plan to use, since the settings you can pick depend on both. Plan a small trial part, because a short test shows more than reading settings on a screen. Keep a notebook or phone note to record what you changed and how the part turned out, since repair parts often need a second round.

Finally, have a way to open and slice the model file. That might be the slicer that came with your printer or a web tool. Work out which way the part will be pulled or pressed, because the direction of the load decides how the layers should run.

Step by step

Describe the job. Write down what the part must hold, the forces it will take, and the conditions it will face.
Pick the material. Choose a filament that suits the load and the environment, and check that it is the one you have on hand.
Set the orientation. Turn the model so the strongest direction runs across the expected load, not along the weakest layer lines.
Set the walls and the top and bottom layers. Use more walls for parts that take force, and keep the outer surfaces solid enough to hold their shape.
Set the infill. Raise it for parts under load and keep it lower for light or cosmetic parts.
Choose the layer height. Thinner layers look smoother and thicker layers print faster, so pick based on the fit and finish you need.
Print a small test. Check the fit and the first layer on a small piece of the same design before you print the full part.
Check the result under real use. Load the part the way it will be used, watch for cracks or flex, and adjust the setting you think caused any failure.
Record the changes. Note each setting and its result so the next print starts from what worked.

Tools that can do it

LunarWerx 3D Print is made by the team that publishes this site. LunarWerx 3D Print is a set of browser tools that work out ironing settings for your printer, check a part for injection moulding and design 3D-printable foam inserts. ^[1] It runs in a web browser ^[1] and you use it on its website, which is hosted on Cloudflare. ^[1] The tools are free to use. ^[1]

For a flat face that needs a clean finish, the ironing helper works out ironing settings for your printer, material and finish and exports a ready 3MF file. ^[1] It makes a 9-pad or 16-pad test plate around your settings, and you mark each pad as worked or not. ^[1] When you open an STL file with faces turned backwards, it turns them right side out and says how many it fixed. ^[1]

For the print settings covered in this guide, look at your slicer's own settings screen. This page has no source describing what any particular slicer does, so check its documentation before you choose.

Common mistakes to avoid

Choosing settings from a single guess is a common mistake. Print a small test first, because a repair part that fails in use wastes time and filament.

Ignoring the direction of the load is another error. A part printed with its layers running across a pull can split along a layer line, even when the rest of the settings look right.

Changing several settings at once makes it hard to know what helped. Change one thing, test it, and write down the result.

Forgetting to measure the mating area leads to parts that are too tight or too loose. Measure the space the part fills and allow for it in the design.

Using a material that cannot handle the heat or water the part will meet is a costly mistake. Check the conditions the part will face before you pick a filament.

Frequently asked questions

What infill should a strong repair part use?

Parts that take force usually need more infill than decorative parts, so start from the load the part carries. Print a small test to see how the part behaves, then raise or lower the infill and test again. Record each change so you can see which setting made the difference. Do not rely on infill alone, because wall count, layer height and print direction also affect how a part holds up.

Is LunarWerx 3D Print free to use?

The tools are free to use. ^[1] The tools run in a web browser ^[1] and you use them on a website hosted on Cloudflare. ^[1] Check the site itself for anything beyond these points before you rely on it for a specific repair.

Can LunarWerx 3D Print fix an STL file with faces turned backwards?

When you open an STL file with faces turned backwards, it turns them right side out and says how many it fixed. ^[1] This can help before you slice a repair part, since a model with reversed faces may not print as expected. Look at the message it gives to confirm what changed.

Can LunarWerx 3D Print make a test plate for ironing settings?

It makes a 9-pad or 16-pad test plate around your settings, and you mark each pad as worked or not. ^[1] Use the marked plate to pick the setting that gives the finish you want before you print the full part. Keep a note of which pad worked so you can repeat the result later.

Which print setting matters most for a strong repair part?

No single setting decides strength on its own. Print direction, wall count and infill work together, so change them one at a time and test each result. Start by describing the load, since the load tells you which direction and which settings to favour. Then check the part under real use before you rely on it.

The tools are free to use. ^[1]

Try LunarWerx 3D Print

Sources

LunarWerx 3D Print's own description of itself (the product of this site's publisher)