BUG: Dense Support with/without Single Walls

[sascha79]

Hello Community

Well, maybe there's a missunderstanding my side, but i'm trying setup the dense support. And i am bit confused how it turns out / it does not do what i expect he should do.

If i define a dense support, i expect that the dense support will be printed right under the model. The printer will print the lines over this dense support for better looking. Well, for some reason, which i cannot explain, there's a big GAP Offset of 5 Layers (0.5mm) between the Dense Support and the model, which will let the model looks bad after finishing.

Let me show that.

My settings:



Here you can see, where i put the support. 1mm pillars


Here are some screenhots (take a look only on the part whith the red outline. The support were for testing not put under the whole model)

On the first picture you can see, that the first Dense Support was printed at Layer 87
On the second picture you see, that the last dense Support was printed at Layer 91

The main question is: Why there's a gap of 5 Layers from Last Dense Support to the First Layer with Model?





Thank you for helping me finding the problem

[dkightley]

It would be 5000% easier to assist if you attached your factory file. As it is I'm unable to suggest anything!

[sascha79]

Yes, of course, forgot to attach this file
Thank you

[sascha79]

In the meantime i figured out what is the cause of these phenomen

The problem is, that Simplify does not recognize parts he do not print. Means: If a wall is too thin to print, you see in the S3D preview that he will not print it. But Simplify do not adjust the need of the support / the height of the required support

Example: (both at Layer 96)
With "Thin wall" activated

With "Thin wall" deactivated

You see, that in both scenario the print of the support is the same. Nevertheless if there's stuff to print or not.

This is a bug, because i tested the same in the "Ideamaker" Software, which produce correct supports

[dkightley]

May I suggest you take a look at this page, which describes all of the new features in v4 of S3D: https://www.simplify3d.com/software/rel ... ion-4-0-0/

In particular the section headed "New Options for thin walls and gaps".

Then go to the Advanced tab of your settings and change the newly introduced setting External Thin Wall Type to "Allow single extrusion walls"......and your "bug" is resolved.

[sascha79]

May I suggest you take a look at this page, which describes all of the new features in v4 of S3D: https://www.simplify3d.com/software/rel ... ion-4-0-0/

In particular the section headed "New Options for thin walls and gaps".

Then go to the Advanced tab of your settings and change the newly introduced setting External Thin Wall Type to "Allow single extrusion walls"......and your "bug" is resolved.

I assumed, i already had a good look at this page. Because i read about the new feature "Allow single extrusion walls" i figured out where this problem came from.

If i decide to not print Single extrusions wall, i expect that S3D regognize it and will place the correct support right under the model (and not till the position where it would IF i used the single extrusion wall).

Or you can point me in a right direction why this isn't a bug?

[dkightley]

Don't assume anything!! We've been trying to get thin wall behaviour properly sorted for a long time. See here: viewtopic.php?f=23&t=3471&hilit=thin+walls

Virtually all of the issues have been addressed in v4.....and the setting I pointed you to will allow your model to be printed how you want it.

[sascha79]

It does not explain why the current placement of the Support-Material in case of (willingly) not using the "Single Wall" Feauture should be fine currently.

Just for my clarification:
- Simplify does NOT place the support correctly under the model if you do not use Single Walls.

I understand, that some walls are too thin to print. In this case, S3D wont print it and in the preview this areas are not avalaible. Fully correct! For this thin walls, there's now the new feauture "Single Wall Extrusion". All is fine. I do not want to use this function at my print, because the results were bad with my printer. Ok, i deactivated the Single Wall Extrusion. If there are areas - like in my pictures example in my last past - which will not be printed, i expect that S3D will place the support-material corretly right under the area which are thick enough to print. If he do not, he will left a gap between the model and the support. Like on my pictures posted at the first.

The feauture "Single Wall Extrusions" seems to work as expected. The problem is, that without the "Single Wall Extrusions" Feauture such areas - which are too thin - are generating a problem in combination with supports.

It looks like a bug, it feels like a bug.. it must be a bug. And if you tell me now, that isn't a bug but a feauture... well ok... then

[sascha79]

Here are two screenshots, how Ideamaker handle it. He do also not print the thin walls but placed the support material right under the model (1 layer separation).

This is how i expect S3D handle it also if "Single Wall" is deactivated