7 mo. ago • 98%

Got a new resin 3d printer: why am I getting holes?

Got an anycubic resin printer and I'm using their high speed resin (because it was bundled for free), and i tried to send a file using the high speed setting.

After the print it was seemed to be ok, then after i left in a bath of ethanol (IPA can't be found in stores in my country) i got all those holes.

What's the problem?

A slicer problem? The ethanol bath? The high speed resin that's not good?

16 comments

It's not air bubbles, they wouldn't cause such huge holes.

I'm guessing that your 3d moddel bad. Intersection edges, wrong normals, that kind of stuff.

Try this: https://all3dp.com/2/stl-repair-fixer-tool-online-offline/

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- To clarify: the issue is that the bad 3d moddel leaves you with very thin walls which get destroyed during the wash
  
  10
  
  the slicer said the model needed a repair (which it did), but then it also does this with other stuff. Later I try with a profile with more exposure time
  
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Ethanol should be fine to use as far as I know. Do the holes go all the way through? If so your screen might have dead spots. You can visually inspect the screen by setting it to do a test exposure without the resin tank on it to check. Also obviously check that your tank doesn't have any failed print bits stick to the sheet.

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- visual inspection of test exposure is ok, and then the vat is brand new so the sheet was immaculate
  
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  Is this the first print you've done with it? Have you done any exposure calibration with this resin?
  
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They look like air bubbles to me, but it is weird they only come out after the bath. Could be they were already inside, but only covered by a thin wall of resin.

I usually use Isopropanol for bath not Ethanol, so I am not sure how your resin reacts with that. The bath should also be rather short, like 1min or something.

A few things to try:

If you are shaking your resin before print, then give it like 10 minutes after you pour it into the vat, so all bubbles come out and pop

lower the print speed

add wait times between the end of lowering the plate and light on

try to hollow out the model if possible, so there is less printing volume
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I unno, but that would paint up into a sick ass looking zombie

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It has nothing to do with the ethanol, the uncured resin simply covers the surface and fills small holes, hiding them

I would guess it's something funny with the 3d model, air bubbles in the tank wouldn't be consistent between layers. Try inspecting the problematic layers on your slicer.

Almost looks like the slicer might be trying to add FDM style infill, make sure it is not.

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