Did I go overboard with the print settings?

Mostly Printed CNC - MPCNC Advice
1

Hi Folks,

I started printing the Primo parts 2 days back, and upgraded my print nozzel to 0.6 m. Wondering if these settings are good. I thought bigger layer height and bigger nozzel will make for faster prints and stronger parts? Am I right?

My print settings:

  • perimeters 5,
  • top solid layers 4
  • bottom solid layers 4
  • layer height 0.4 mm
  • infill 60% honeycomb
  • Rest settings as default for latest 2.2.0+ 0.4 M Draft @0.6 mm nozzle

Core printed with 70% infill

2

Hi there! Your settings look fine! Only thing I noticed is the number of perimeters. With 0.6mm nozzle, I would assume 3 is more than enough?

3

I wouldn’t do honeycomb,if not rectilinear I would do gyroid instead and follow Ryan’s @vicious1 specs for the Core!

4

Yeah, we had links to a study here a while ago where testing showed that lower layer height in ratio to nozzle diameter gave stronger parts that larger layer height with the same nozzle. As long as you stick to the normal ratios you should be fine though, but for the strongest parts you want the layers a little thinner than normal. As Bjorn suggests you don’t need that many perimeters. Gyroid infill will be a little faster that honeycomb, rectilinear will be quite a it faster.

5

Thanks for confirming, I actually don’t care about print time and weight, I am buying steel rods to support weight. I just want the strongest and most rigid parts.

Seems I should have reduced the height I suspect from your comments. And maybe slower printing for better layer bonding. Also extra perimeters and solid layers don’t help

IMG_5241
IMG_52413024×4032 1.66 MB
IMG_5240
IMG_52403024×4032 2 MB
IMG_5238
IMG_52383024×4032 1.25 MB
IMG_5236
IMG_52363024×4032 1.14 MB

3 Likes
6

Hi @gpagnozzi, any reason rectilinear and not honeycomb? I thought honeycomb would make it stronger?

7

Your print seems nice! I think honeycomb has a uniform pattern, whereas rectilinear and gyroid pattern “skews” throughout the print. But with the high infill density on the parts, and especially the core, I’m totally sure that it’s more than strong enough.

8

My printer would vibrate apart it think😀

9

I thought it was the other way around?

10

At this infill percentage, you don’t gain that much strength, and you, like, quadruple your print time. Rectilinear is faster (lots of straight lines instead of corners), but I believe gyroid is stronger (and actually uses more filament) while being faster than honeycomb or triangles (lots of curves, rather than tiny line segments).

But it’s ultimately your printer, your filament, your part and your machine. So you do you, and take everything as words of advice, not gospel (well, unless @vicious1 or @jeffeb3 or maybe @barry99705 says it, they’re bankers in my book).

2 Likes
11

Thanks! I agree with your recommendations on infill, just had heard in the past honeycomb was better than linear for strength that’s why I chose that, I’ll try gyroid with 50% for the next few parts and reduce layer height to 0.3-0.35 .