Does Layer Height effect print strength?

[RobH2]

One thing I have noticed is that on some prints with higher layers I sometimes don't get as good adhesion as ones with thinner layers. I think with the thinner layers each one may get pushed into the subsequent one better. For instance, I printed a conical part about the size of a D battery. It was about 4" tall and I used .25 as the layer height. I flexed it just a bit to test it and it split between layers. So I reprinted it a .18 and when I tested it, it was really tight. I even bent it pretty firmly and it did not separate.

I'm not sure if my printer was malfunctioning or it it's just the nature of layer heights in general, but from my experience, I don't trust the integrity of prints with thicker layers as much as I do those with thinner ones.

[MeoWorks]

One thing I have noticed is that on some prints with higher layers I sometimes don't get as good adhesion as ones with thinner layers. I think with the thinner layers each one may get pushed into the subsequent one better. For instance, I printed a conical part about the size of a D battery. It was about 4" tall and I used .25 as the layer height. I flexed it just a bit to test it and it split between layers. So I reprinted it a .18 and when I tested it, it was really tight. I even bent it pretty firmly and it did not separate.

I'm not sure if my printer was malfunctioning or it it's just the nature of layer heights in general, but from my experience, I don't trust the integrity of prints with thicker layers as much as I do those with thinner ones.

Same experience here, my sturdier prints are all 0.1mm or lower. I do think parameter (shell thickness) plays a bigger role though.

[Geoff]

Same experience here, my sturdier prints are all 0.1mm or lower. I do think parameter (shell thickness) plays a bigger role though.

Definitely shells. All my quadcopters require 20%infill minimum and 2-3 shells for rigidity. Layer height makes very little difference, but it depends on your force distribution. For a quadcotper arm, I print them flat - so the layers run horizontally, or the same way it's going to sit on the quad. If I was to print them standing up, as in long and tall... they would print layer by layer in the wrong direction...

hard to explain, but print out a small tube. Print one out standing up and the other lying down flat.

The one standing up straight will be more round and look better, but the one you printed laying down witll be 10x stronger to flex and wont snap.

Look at the two pictures. See the cylinder standing up is built with small cricles - these are ok but not as strong as picture 2, where it's layed down in long strips - this is much much more rigid.
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