Can someone explain the printing settings "shell 1" to me please?

[Sascha Schwarz]

Hello,

am still a newbie in 3D printing and just got may printer 2 weeks ago. Now i want to print my first InMoov parts. I stumbled across the printing instructions for the infill and support. 

What i did not understand id the shell parameter. Does this means "shell 1" should be 1mm wall thickness, "shell 2" is 2mm and "shell 3" is 3mm wall thickness?

 

PS: I am using a Creality3D CR10, and Cura as Slicer Software.

best regards

Sascha

[buildstoys]

To keep it simple: Set your shell thickness equal to your nozzle diameter.

 

So if your Creality printer is stock (.4mm nozzle) your shell would be .4/.8/1.2mm for 1, 2 or 3 shells.

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[gael langevin]

Hello Sascha,

We call shell, the perimeter line.

3 shells will be 3 perimeter lines.

Depending on your resolution the shell diameter will increase or decrease.

Lower your resolution and your wall thickness will decrease, therefore to keep a stronger wall thickness you will need to increase the number of shells.

A part will be stronger (specially for InMoov) if you have a good wall thickness of perimeter lines.

To have good and strong parts I recommend about 2,0 or 3mm thickness of perimeter for common parts.

You will need to add even more shells for the gearings, I personnaly have between 4mm and 5mm of wall thickness for the shoulder gears.

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Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

2017-09-11 21:02 GMT+02:00 buildstoys <build...@gmail.com>:

To keep it simple: Set your shell thickness equal to your nozzle diameter.

 

So if your Creality printer is stock (.4mm nozzle) your shell would be .4/.8/1.2mm for 1, 2 or 3 shells.

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[buildstoys]

Resolution (layer height) and wall thickness (shells) are two separate settings.  Changing one does not change the other.

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[gael langevin]

Hello Buildtoys,

Indeed you are correct in many software it is the case.

But some software didn't use to work that way, this is why I have been explaining this to many people since 6 years now.

Here is the difference I try to explain in pictures for your InMoov parts, better resolution can reduce the strength of your parts.

Here below is Nozzle:0.4 , resolution:0.3mm, shell:3, extrusion width:0.4

Here below is Nozzle:0.4 , resolution:0.10mm, shell:3, extrusion width:0.20

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Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

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