How to design a printable CAD model

Here are some things to consider when designing a part to be 3D printed. By following these steps, you have a better chance of an end result which you are happy with, reducing the risk of deformation or any imperfections in the print.

1. Wall Thickness:

3D printers print solid bodies, not surfaces. This means that when designing a part, you need to make sure that all the thicknesses and dimensions in your design are greater than 0. You should also consider what a suitable thickness might be as a thin, unsupported structure is much more likely to break.

2. Spacing:

Make sure that all parts to be printed have adequate space between them so that they can be printed separately. Ensure that there are no shared edges.

3. Supports:

Any overhangs or not flat surfaces might require supports in order to print. In this case, the supports may cause a texture to the part where they were connected so if a smooth surface is required, try to design a part to minimize the use of supports.

4. Size:

You should ensure that the model fits inside the print volume of the printer. The largest printer we have has a total print volume of 305 x 305 x 605mm so any parts you have must be small enough to fit this.

5. Scale Down:

If the part you want is too large, you can always scale it down if it is a prototype or size is not a priority. In this case, you must make sure that none of the tolerances or dimensions become too small and unable to be reliably printed.

6. Moving Parts:

If your design includes any moving parts, you must make sure that they have enough space to move freely. As a general rule, gaps between moving parts should be around 0.5mm or else too much friction might prohibit movement.