Multipart print. What determines what gets printed at the intersections of the parts?
 
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Multipart print. What determines what gets printed at the intersections of the parts?  

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stratocaster
(@stratocaster)
Eminent Member
Multipart print. What determines what gets printed at the intersections of the parts?

Hi All,

Tough one to put into words…. Anyway I have an XL multi tool.  I am printing a multipart print.  It is the Star Wars robot  BB8, see attached.  I have a white shelled sphere as a part and the orange and gray “decals” as other parts. The Sphere is 6mm thick and the “decals” are 5mm thick.   The “decal” parts are positions so that they stick out .20mm outside the sphere.  What I want, is for the decals to be orange and gray through out their 5mm thickness.  What is happening is white is taking priority at the intersection of these parts.   See the image attached.   Is there a setting or technique in the Prusa slicer to specify what happens at the intersection of parts, ie which parts take priority?  Hope this makes sense.

Thanks in advance,

carmine

Veröffentlicht : 04/12/2024 3:20 pm
Diem
 Diem
(@diem)
Illustrious Member

How are you colouring the parts?  Is that painting in the slicer?  Attached is a sample three-colour file; unzip it, import the three files together as *parts* and allocate each to a different extruder. You will find one colour is flush and the other protrudes 0.2mm.

If you print it use 0.2mm layers.

Examine the individual files to see the technique.

Cheerio,

Veröffentlicht : 04/12/2024 4:53 pm
stratocaster
(@stratocaster)
Eminent Member
Themenstarter answered:
RE: Multipart print. What determines what gets printed at the intersections of the parts?
Posted by: @diem

How are you colouring the parts?  Is that painting in the slicer?  Attached is a sample three-colour file; unzip it, import the three files together as *parts* and allocate each to a different extruder. You will find one colour is flush and the other protrudes 0.2mm.

If you print it use 0.2mm layers.

Examine the individual files to see the technique.

Cheerio,

Diem, 

Thank you for your reply. In my case I am importing them all as parts. Then I select each part and specify an extruder for each.   Sorry I wasn't clear about that originally.

I'll take a look at your example and see if I experience the same thing.

thanks!

Carmine

Veröffentlicht : 04/12/2024 5:29 pm
stratocaster
(@stratocaster)
Eminent Member
Themenstarter answered:
RE: Multipart print. What determines what gets printed at the intersections of the parts?

 

Posted by: @stratocaster
Posted by: @diem

How are you colouring the parts?  Is that painting in the slicer?  Attached is a sample three-colour file; unzip it, import the three files together as *parts* and allocate each to a different extruder. You will find one colour is flush and the other protrudes 0.2mm.

If you print it use 0.2mm layers.

Examine the individual files to see the technique.

Cheerio,

Diem, 

Thank you for your reply. In my case I am importing them all as parts. Then I select each part and specify an extruder for each.   Sorry I wasn't clear about that originally.

I'll take a look at your example and see if I experience the same thing.

thanks!

Carmine

Hey Diem, 

I tried your example.   I set each part to a different extruder.  In this case I chose extruder two (orange) for the word caster.  I see the same thing as in my original case.  When I slice the model and scroll through layer by layer I would like to see the word caster (3colourdemo3) as orange all the way through, but that's not happening.  The only part that is orange are the layers that are above 3colourdemo1.stl (the solid rectangle).   I was wondering if there was a way to make this happen.  

I attached my 3mf file with the model that demonstrates what I am saying.  Look at the object LEFT0. I have it colored with extruder 4.  You can see how thick it is by selecting it and moving it around.  Slice the model and then scroll layer by layer and you'll see what I am referring to after a number of layers the part LEFT0 is colored with extruder 3.

 

Carmine 

 

 

Veröffentlicht : 04/12/2024 8:06 pm
stratocaster
(@stratocaster)
Eminent Member
Themenstarter answered:
RE: Multipart print. What determines what gets printed at the intersections of the parts?

Here's the attachment.  Guess I had to zip it.

Veröffentlicht : 04/12/2024 8:41 pm
Diem
 Diem
(@diem)
Illustrious Member

Is this what you're trying to do?

Cheerio,

Veröffentlicht : 04/12/2024 8:45 pm
stratocaster
(@stratocaster)
Eminent Member
Themenstarter answered:
RE: Multipart print. What determines what gets printed at the intersections of the parts?

 

Posted by: @diem

Is this what you're trying to do?

Cheerio,

Diem,

Yes. That is the gist of it.  Did you get a chance to look at my example?  I wonder if there is an issue since my example is a sphere...   I can do something similar to what you did if I just have a rectangle and a cylinder and just move the cylinder inside the rectangle.  It appears to work, but I can't figure out why it isn't doing it in my example.

thanks!

Carmine

Veröffentlicht : 04/12/2024 10:28 pm
Diem
 Diem
(@diem)
Illustrious Member

Your example isn't thick enough.  The simplest method is to design the body and the feature, subtract the feature from the body to make a tailored void and replace it with another copy of the feaure saved seperately and allocated to a different extruder;.

Cheerio,

Veröffentlicht : 05/12/2024 6:18 am
stratocaster gefällt das
BaconFase
(@baconfase)
Reputable Member
RE: Multipart print. What determines what gets printed at the intersections of the parts?

The issue is your 'decals' overlap the white base sphere rather than each part having their own dedicated space. When multiple parts (not objects) overlap their order on the model list dictates which part overrides the other.

When the "sphere part" is on the bottom of the list it has priority over all other parts, so you only get your ".2mm extra" of the decals:

 

When the "sphere part" is on the top of the list it has the least priority, so all the decals get their full shape printed:

 

XL-5T, MK3S MMU3 || GUIDE: How to print with multiple-nozzlesizes do read updated replies || PrusaSlicer Fork with multi-nozzlesize freedom || How Feasible is Printing PETG for PLA supports on XL very

Veröffentlicht : 05/12/2024 7:08 am
stratocaster gefällt das
stratocaster
(@stratocaster)
Eminent Member
Themenstarter answered:
RE: Multipart print. What determines what gets printed at the intersections of the parts?

BaconFase,

Thank you I’ll give that a try.  When you say top of the list you mean the top of the tree?  So I need to import them so that the MainBody (sphere part) is the root of the tree. 

Thanks again

Carmine

Veröffentlicht : 05/12/2024 12:45 pm
stratocaster
(@stratocaster)
Eminent Member
Themenstarter answered:
RE: Multipart print. What determines what gets printed at the intersections of the parts?
Posted by: @diem

Your example isn't thick enough.  The simplest method is to design the body and the feature, subtract the feature from the body to make a tailored void and replace it with another copy of the feaure saved seperately and allocated to a different extruder;.

Cheerio,

That’s a great idea.  I will try to do an intersection with the sphere and decals so there is a void in the sphere where the parts meet.  I’ll try that too.  Thank you much.

Veröffentlicht : 05/12/2024 12:48 pm
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