Does anybody have experience in printing hollow structures with internal supports inside?
Recently we had some fail prints and we suspect insufficient support inside the hollow.
We noticed that some of the internal supports had even in Preform a smaller diameter although we defined one value for that, for example 1mm.
In both pictures below you can see the different internal supports, that technically should be all similar.
It looks like Preform adapt the internal support’s diameter despite of the firmly defined value.
This issue is even independent of how to create these Supports, automatically or manually.
Does anybody noticed that in his prints and has some hints or a solution for that?
we would be very grateful for any support
Those little ones are known as “pins”. You should only get those when the gap is really small. Too small for a full sized internal support to flair out and back in. They’re strong enough for those small gaps. I wouldn’t expect that’s actually the cause of the issue you’re seeing here.
First of all thanks a lot for your answer.
I assumed an algorithm creating these “pins”.
Is there an option to define the diameter of this pins?
I couldn’t find an alternative method to just identifying such “pin areas” and increase the density of the pins manually.
The pins might be strong enough in most cases, but probably not if the layer of material, which they have to support, gets bigger.
For example you can see the automatically generated pins in such areas in the pictures below.
Of course we can avoid such big area gaps during the creation of the hollow structure.
Or consider this gaps during the orientation process in Preform.
Nevertheless it would be great just to define or deactivate the pins despite of the increased material consumption.
In the picture you can see the corresponding failprint with the too small pins (marked red).
The other supports above have a diameter of 0,8 mm.
