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Issue with Lightning Infill  

Eminent Member
Issue with Lightning Infill

I am trying to print a series of very large topographic models on my XL.  They kind of look like a square box with straight sides about 4-6 inches high and then a lot of wrinkles at the top.  I have been using Adaptive Cubic with 2 perimeters , 10% infill.  It works fine but takes over 30 hours.  I tried Lightning, also 2 perimeters and 10% infill, and it takes 26 hours.  The issue is that the sides of the box are a bit wobbly - you can easily press them in a bit with your fingers.  Others have noted this and, of course, it makes sense since Lightning in essence builds infill from the top down and all the other infill types from the bottom up.

So to my question - I'd love ideas on improving the support without a big hit to the print time.  My analysis so far:

1: Lightning with 3 perimeters is 30 hours - might as well use Adaptive Cubic.

2: Lightning with higher percentages of infill don't do anything for side support

3: Figuring out how to add diagonal walls in the corners of the model to support them - but so far have not been able do do this.  Easy to do in TinkerCAD but the models are far too complex and TinkerCAD can't import then.

Thank you



Posted : 14/04/2024 6:57 pm
Illustrious Member
RE: Issue with Lightning Infill

Without having an example to examine the best suggestion is to use modifiers to change the type of infill for different areas.

If you want better suggestions then create an example project in Prusa Slicer, use File>Save project as to save the 3mf file and then ZIP it up and attach it here.  Must be zipped or the forum will just silently not attach it.  

Posted : 14/04/2024 7:19 pm