(Too) wide bottom support interface layers on dual extruders using soluble material
 
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elphil
(@elphil)
Active Member
(Too) wide bottom support interface layers on dual extruders using soluble material

Hi,

I'm trying to print using water soluble support only for the interface layers.

It is working great per se but a small Problem occurs on the bottom interface layers, despite the snug support style, the layers are wider than they should be (in my opinion) and are thus partly printed in the air, see file attached (not zipped, just remove ".zip" from filename) and the image below.

Does someone know whether there's a setting to change the expansion somewhere or have another idea as to what's causing this?

Thanks a lot! Cheers
Philipp

 

Posted : 28/03/2024 9:05 am
Robin
(@robin)
Prominent Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

no file attached

If at first you don't succeed, skydiving is not for you.

Posted : 28/03/2024 10:22 am
elphil
(@elphil)
Active Member
Topic starter answered:
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

Thanks for letting me know, must have accidentally deleted the hyperlink.

nervenhalter.3mf

Cheers!
Philipp

Posted : 28/03/2024 12:53 pm
Dave
 Dave
(@dave-12)
Active Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

If I hit "Slice now" in the 3mf file you've posted (I had to delete .zip from the end of the name, not unzip it, by the way), I get this, which looks fine. It looks like a different object to the one you took a screenshot of. Can you post that 3mf file?

 

Posted : 01/04/2024 1:41 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

a .3mf file IS a zip file, but the extension is different... 
unzipping it would have worked too.
regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 01/04/2024 2:18 pm
Dave
 Dave
(@dave-12)
Active Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

OK, so I've tried dragging and dropping the file with the .zip extension still in place and it does indeed open in the slicer. That is interesting. However if I unzip it, I get directories and files, none of which will open in the slicer. I guess the slicer ignores the naming of the file and tries to do something sensible with it of its own deciding? I guess the .zip extension and/or the zip format of the file made the forum happy to accept it, but treating it as a zip file in Windows and unzipping it gives unusable data. Or have I still missed something?

Posted : 01/04/2024 3:31 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

Hi Dave, 
I Don't have access to your zipfile, however I do regularly open zip files and then use the resultant files. 

Do you want to attach your zipfile, for people to try? 

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 01/04/2024 5:16 pm
Dave
 Dave
(@dave-12)
Active Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

I'm referring to the file that the original poster of the problem provided.

Posted by: @elphil

Thanks for letting me know, must have accidentally deleted the hyperlink.

nervenhalter.3mf

Cheers!
Philipp

 

Posted : 01/04/2024 5:18 pm
Robin
(@robin)
Prominent Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

 

Posted by: @dave-12

OK, so I've tried dragging and dropping the file with the .zip extension still in place and it does indeed open in the slicer. That is interesting. However if I unzip it, I get directories and files, none of which will open in the slicer. I guess the slicer ignores the naming of the file and tries to do something sensible with it of its own deciding? I guess the .zip extension and/or the zip format of the file made the forum happy to accept it, but treating it as a zip file in Windows and unzipping it gives unusable data. Or have I still missed something?

I don‘t know what you are missing or not. As Joan pointed out, 3mf files are in fact zip-files containing the data. Google it, it‘s an open format. By messing with the extension, a.k.a renaming it you make things unnecessary difficult for everybody. Try to do what everybody does, zip the 3mf (yes, zip the zip, who cares?) and post it (it’s only because the forum will only accept zip files). This way everybody can just download it, click it and load it - it’s that easy…

If at first you don't succeed, skydiving is not for you.

Posted : 01/04/2024 5:48 pm
Dave
 Dave
(@dave-12)
Active Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

When I click on the like to the file in OP's post, it downloads as a file with a .zip extension, but it does not unzip to a 3mf file, it unzips to the /contents/ of a 3mf file. Have you tried clicking on it to download to see what you get?

Posted : 01/04/2024 6:19 pm
Dave
 Dave
(@dave-12)
Active Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

@robin seems to be confusing me with the original poster.

Posted : 01/04/2024 6:48 pm
Dave
 Dave
(@dave-12)
Active Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

My comment of 01/04/2024 5:18 pm is still waiting to be moderated. @robin might be clearer about what's happening if he can read that. @joantabb needs to see it too, but she seems to be a moderator so should be able to see it? My most recent comment has been moderated, so maybe that post and the one responding to @robin with clarifying information have been missed?

Posted : 01/04/2024 9:10 pm
elphil
(@elphil)
Active Member
Topic starter answered:
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

Hi,

 

sorry for all the confusion I unintentionally generated, here's the right file, this time actually zipped.

NervenhalterTestteil

Double checked this time so hope I haven't made another mistake.
Thanks for your patience!

Cheers
Philipp

Posted : 02/04/2024 9:06 am
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

Hi Phillip, 

thanks for the Update... 

As I understand the situation, first time round, you added an additional extension of ,zip, instead of actually zipping the file

Then @Dave recognised this and posted... 

I Missed this act and commented that a .3mf file, is a Zip File but with a different extension. 
And confusion continued. 

I have downloaded your latest file, and unzipped it,  and it appears to be the image Phillipp initially sent... 
the bottom interface layer does appear to be larger than normal, 

Unfortunately I have to go out now, so I can't investigate immediately... 

If no  one can sort this, I will have a look when I get home. 

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 02/04/2024 11:27 am
elphil
(@elphil)
Active Member
Topic starter answered:
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

Hi Joan,

that is exactly what happened, in my first post (unfortunately missing the file) I wrote that I just renamed, deeming it easier and less cluttery to rename than to unzip, but didn't think to mention it again in the second post, additionally using the wrong file. Sorry again, that was as confusing as it can get.

Glad to see I did not mess up again 😉

Thanks for having a look,
Cheers
Philipp

Posted : 02/04/2024 11:37 am
Dave
 Dave
(@dave-12)
Active Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

@joantabb here is the image @elphil originally posted this image. Open it to full size and note that it is 19.5x16.75x18mm. Look at the shape.

Now open the screenshot of the object they posted to full size and note its shape and its dimensions. It's a different object.

If you can have a closer look at the support material in the screenshot I provided of this object with the settings provided, we can perhaps have your opinion on this object too.

Posted : 02/04/2024 11:49 am
Dave
 Dave
(@dave-12)
Active Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

I got angry and impatient and paid as little attention as the other two respondents did to my more careful comment originally. I apologise for the previous comment. You have the option of deleting both or posting both of this more recent two, I'm happy to own up to my own failings.

Posted : 02/04/2024 7:00 pm
Dave
 Dave
(@dave-12)
Active Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

@elphil when I load up the new 3mf it slices to a single tool ("left extruder only" in the preset name?), and the support material seems to be avoiding providing support. Fascinating. Looking forward to the explanation!

Posted : 02/04/2024 8:09 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE:

Hi  Dave, 
the support application is a bit odd. 
No Idea why

Phillipp
I would be tempted to do Organic supports which do not have the "Bottom  Contact Z Distance"
and the enlarged Support Material Interface, is supported by the organic branches

You do not appear to have a soluble filament selected in Prusa slicer

Good luck with your venture

 

Regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 02/04/2024 9:06 pm
Dave
 Dave
(@dave-12)
Active Member
RE: (Too) wide bottom support interface layers on dual extruders using soluble material

Now this is interesting - there's another user print settings preset in the 3mf file. If I select that and slice, it gives a sensible looking slice, but missing the interface material. @elphil do you need to perform the slice you intend before saving the 3mf file, perhaps?

 

Posted : 02/04/2024 9:15 pm
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