Popping noise and voids

Having a problem? Post it here and someone will be along shortly to help
Post Reply
PannDemic
Printmaster!
Posts: 35
Joined: Tue Feb 02, 2016 3:15 am

Popping noise and voids

Post by PannDemic »

So, I have some SeeMeCNC Artic White ABS that is printing at 230°C. As it extrudes, I hear a popping coming from the nozzle and can see the smallest voids in the extrusion.
Any idea what is causing this, and how to remedy it?

I did some searching but found mostly issues with extruders, but this is at the nozzle, seems like a pocket of gas that blows out the soft filament as it is extruded.

Thanks for the great community
Pann

User avatar
teoman
ULTIMATE 3D JEDI
Posts: 1783
Joined: Sat May 24, 2014 5:43 pm

Re: Popping noise and voids

Post by teoman »

Your filament has water in it.
When on mobile I am brief and may be perceived as an arsl.

TheIrishScion
Printmaster!
Posts: 56
Joined: Mon Jan 18, 2016 5:44 pm

Re: Popping noise and voids

Post by TheIrishScion »

Well, at any rate it's a bit damp. The pops are absorbed humidity in the filament itself, this is why it's so important to keep it in a very very dry place when you aren't using it. If you have a very dry place (enclosed water heater closet for example) you can likely dry it out over the course of a week or two. Sealing it in a bag with some desiccant sachets in a warm place is likely to work even better, if the desiccant is dry to begin with.

PannDemic
Printmaster!
Posts: 35
Joined: Tue Feb 02, 2016 3:15 am

Re: Popping noise and voids

Post by PannDemic »

Could it be caused by a long retraction distance? It seems to get worse as I continue to chase down the right retraction length. I am now at 13mm of retraction, using an all stock Rostock MAX V2.
I think it might be, I did not have any gaps in my printing artifacts, but now I have both oozing and gaps with these pops. It is also a brand new role, and I live in the desert.

PannDemic
Printmaster!
Posts: 35
Joined: Tue Feb 02, 2016 3:15 am

Re: Popping noise and voids

Post by PannDemic »

This is what my prints now are looking like. The small pits are gone, and it seems like entire lines of extrusion are missing.

Image

nebbian
Printmaster!
Posts: 175
Joined: Wed Sep 23, 2015 12:31 am

Re: Popping noise and voids

Post by nebbian »

13mm seems way too high. You might be seeing air bubbles due to severe overretraction, which would fit with the popping noises you're hearing. I would set retraction to 5mm or so, and see what happens.

Post Reply

Return to “Troubleshooting”