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amprint
(@amprint)
Trusted Member
surface structure not smooth

Hi guys,

today I was printing a smartphone case and have a couple of visible surface problems on this one. I am not sure where this comes from and hope to get some help by the experts 🙂

As you can see in the attachments there are visible surface problems. It is hard to show this with black filament, but I hope you can see the problem.
I printed this one with black PETG from extrudr with nozzle at 210°C and bed at 80°C. Sliced it with Slic3er at 0.3 layer height and 25% infill. Can cubic infill cause this? For me it looks like you can see the infill structure on the outside surface.
I was thinking about changing from cubic to honeycomp infill and maybe increase retraction a bit. May this help?

Thanks in advance for your help!

Regards

Design, Print, Repeat

Napsal : 18/04/2017 10:17 pm
lee.g
(@lee-g)
Estimable Member
Re: surface structure not smooth

If this is with 2 perimeters then change to 3 perimeters. I had a similiar issue and it was because I didn't have enough perimeters.

Napsal : 18/04/2017 10:22 pm
amprint
(@amprint)
Trusted Member
Topic starter answered:
Re: surface structure not smooth

Thanks lee,

that's a good idea. Yes, the default settings for 0.3 (derived from 0.35) are 2 shells. Definitely going to try it with 3 shells!

Design, Print, Repeat

Napsal : 19/04/2017 12:32 am
amprint
(@amprint)
Trusted Member
Topic starter answered:
Re: surface structure not smooth

Okay, thank you again, lee.
I changed the amount of shells to 4 (may be a bit too much, but just to be sure), and this time it came out much better. Not perfect, but that's because of the model.

Still learning every day 🙂

Design, Print, Repeat

Napsal : 20/04/2017 10:01 pm
JeffJordan
(@jeffjordan)
Member Moderator
Re: surface structure not smooth

furthermore you can reduce the "overlap", which may cause that infill will reach into the perimeter and disturb its smoothness.

dem inscheniör is' nix zu schwör...

Napsal : 21/04/2017 2:08 am
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