3D printing settings for LongMill parts

18 of our 40 odd printers

We have gotten a lot of questions about the settings used for the LongMill. This post will cover details on what settings we use for printing our parts.

Material

We print all of our parts using black PLA+. The brand will vary sometimes, but we typically vet and purchase material after testing that the material prints good quality parts.

Parts designed for 3D printing are usually made so that they are relatively forgiving in terms of material quality and printing settings.

Print temperatures we use for PLA+ is 215C with brass nozzles, and 223C with stainless steel nozzles.

Printers

We use a combination of Ender 3s, Anycubic Mega-S, and Prusa i3 printers. Parts are usually segregated by printer depending on its strengths and weaknesses (ability to print overhangs, bed surface, speed, ect). However, if you are printing at home and not in a production environment, any FDM printer will do.

Settings

Here are our settings.

  • 0.6mm nozzle

We have found that a 0.6mm nozzle gives a good balance between print speed and quality. Larger nozzles may be good for larger parts like the angle mounts and feet.

  • 0.3-0.35mm layer height

Like above, this setting balances print speed and quality.

  • 30-50% gyroid infill

We found that gyroid infill provides good strength in all directions. A higher infill can improve part strength, but we use a lower infill on parts that are more prone to warping, or do not require high strength. Instead of increasing infill, it is usually better to “beef up” the part for higher rigidity.

  • 3 perimeters (1.8mm appx)

Higher number of perimeters improves print strength. I would recommend using more perimeters if you are using a smaller nozzle.

  • 3-4mm top and bottom solid thickness

For some parts take loads along the plate of the solid walls of the printed part, increasing this number can help improve the rigidity of the part.

Tips and conclusion

If you are printing parts for yourself, you can choose settings that best fit with your printer. Increasing infill, number of perimeters, and top and bottom solid thickness can improve the strength of your parts.

One set of parts takes approximately 40 hours of printing.

Every printer is a little bit different and thus works best with different settings. We recommend using the settings that work for you. The settings above are what works for us, and gives us a high quality, high strength part.