This inaccuracy is called tolerance and is a feature present in all forms of manufacturing.

In some fields, this tolerance needs to be particularly fine.

For example, in the watchmaking industry, the tolerances on each component are tiny.

Similarly, optical mirrors used in telescopes for astronomy also have incredibly tiny tolerances.

These tight tolerances are necessary for the final machine to function as intended.

In most cases, though, tolerances arent quite so precise.

If youre 3D printing a vase, for example, you want it to look right.

You just dont need the same level of precision that interlocking mechanical components do, though.

This is especially useful if youre planning on making an interlocking or mechanical model.

The easiest way to check your printers current dimensional accuracy is to print a calibration cube.

you might find these cubes online or design your own.

Calibration cubes simplify comparing the real-world dimensions of the cube to the dimensions of the computer model.

This comparison gives you an understanding of the potentially different tolerances on each axis.

Tip: Generally, it is better to have positive inaccuracies.

It is easier to remove material via sanding than to add new material to an otherwise complete print.

If not, this is a good time to perform your printers quick clean and maintenance check.

It can also help to add a spot of oil to your linear rods and screws.

This aids their smooth motion but be careful not to add too much.

This gives your printer more precise control over exactly where the printed filament ends up.

This may not always be practical, however.

If you cant achieve your required tolerances, you may want to try using a 3D printing service instead.

With more expensive gear and professional setups, they may be able to achieve the required tolerances.

Conclusion

Dimensional accuracy is important for your 3D printables to look right.

There are several ways to improve this and achieve better tolerances.

These all require some work, though.

Have you got any other tips to share on improving dimensional accuracy?

Let us know down below.