So I have a situation where the top of the model has an overhang. It works as a vase but when I have layers that then apply gap infill, the inner and outer walls (3 walls) are fine and slow down but the gap infill just flies off and doesnt do what I thought would be reasonable. On the inside it looks pretty messy.
Why don’t you eliminate the internal overhangs by somehow merging the model (it seems to be made up of separate parts)?
If it absolutely has to be printed like this, you could add support overall and set the upper and lower distance of the support structure to the model to 0mm. But that would be more bungling.
I have only the important line types showing.
Its a cavity mold insert
It was just a question, not of how to do it, as I could just add a modifier and control the gap infill speed on the focus area. Its a workflow question and if gap infill is in an overhang zone then it should respect the speed. These are production parts and must print, lots of them, in one piece, as quickly as possible with as many features managed and no handling afterwards as they fit into production casting after print. Im still having to clean the threads on the bosses as regardless of what I do, the overprint when doing threads has also not been solved.
We never use supports…well unless 101% neccessary.
Cheers
Add an extra cylinder inside to bridge the gap, you are referring to the overhangs inside aren’t you?
I honestly don’t know what your exact expectations are, how the object is designed and how it should be printed.
The picture using concentric paths on the dome really does point towards a 101% neccessitiy for supports. Unless the apprentice finally manages to get the Siemens Air Anchors from storage…
Like “slow-down-for-overhangs”? That’ll help up to a point but the root cause of very high large overhangs remains. Key would be to change from an overhang to a bridge.
Depending on your freedom for redesign, you may have a chance to flatten the domes inner surface to lay flat, so you can either try a linear pattern to transform into a long bridge or go with a 2 part quick assembly which may be quicker than support removal.
@EnoTheThracian and @KanneKaffe
Ill start from the beginning…and try and reword it a bit more clearly
- Im checking whether anyone thinks that gap infills during the slow down of an overhang should be related logically
- Im only able to post the analytics of the model as its client IP under NDA
- Its a cavity mold so it can’t have any geometry added to the internal space
- I have pretty good success with convex circular shapes with overhangs and with tapers, its quite easy to do a lot better than with linear segments ie think catenary domes and compression
- Its the inconsistency of the 2 elements; ie Overhang and gap infill that are the problem and sure I can just use a modifier on the region for gap infill speed but thats why Im asking the question as it seems like a good place to put an option on gap infill
ie a check box with “Gap Infill Speed Follows Overhangs”
Im trying to contribute to making the software better…
Here are some clearer analytics
The 3 different components
The speed ranges
In other words, if a gap infill cohabitates in a space where there is overhang speed control applied, the speed is higher priority in the time domain so therefore I would have thought that gap infill should follow.
HTH
Hi @Aurasphere
Many thanks for the additional background. I am not able to fully capture everything, but maybe you will find one of my following contributions useful.
There are many different specialized applications where dedicated, tailored solutions are useful. Nevertheless, development has to cater for the majority and therefore may prioritize differently. From what I understand, there is a very close link between Bambu Studio and Orca slicer, especially from a user perspective: Feels identical with a few more options. Furthermore, the Orca team is open to community requests and contributions. So I expect that the most competent answers on software feature implementation can best be obtained by heading to Orca - GitHub and raising a request there. And perhaps trying out the Orca slicer itself. Orca developments do spill over into Bambu Studio, albeit with a delay.
Understood
Understood
I think I still have a misunderstanding as to how you achieve this. But that may just be due to the limited images you can show and my lack of familiarity with mould printing. Usually, I have observed infill printed after the walls. But on an unsupported, steep overhang, the prior walls would need to be printed in the air (blue before white in your path type images).
So obviously I have a misunderstanding there.
I’d be interested to learn about the actual details but do not think that humoring my curiosity neccessarily helps you. I understand if you can not go into the detail required for me to properly understand.
I think the fastest way for that would be to reach out directly to the Orca slicer team on GitHub.
Best wishes and many thanks for the explanations,
Eno
Thanks for the reply
I use Orca for all my other machines but I usually prototype on the x1 (although usually scale model because of the size limitations)
I printed just a section with the gap infill manually slowed down (but not quite enough) and as you can see, the top still prints fine. Its the mess that the gap infill is making that is the prob and makes the problem of the parameter disconnect obvious.
Tapered oblique spheroids can print like this with no overhangs because of the same principles of archimedes swirls being able to print in mid air and the principles of catenary domes being only under compression just happened to help print with no overhangs
Anyway; it makes sense to put this in a more detailed user base: BBLS seems to be a lot more about hobbyists…so thanks for the reminder
Cheers for the chat
This is a diff model but same tapered oblique spheroid and it prints no overhangs fine
Here, looking back inside on the underface, you can see the gap infill going crazy; which is “visible and” needs to be neat
Here is a testing sample of the current one which is not pointed and still does more than good enough considering it will be buried in masonry. It has the gap infill slowed right down…and no artifacts
Just need to apply arachne to the top and it will also be 100%
EDIT:
Here it is with the gap infill linked to same speed as overhangs…perfect and not an overhang is sight hehe!
Many thanks for this 
Learned something today
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