ripping/tearing of first few layers in one local spot on large print.

The first few layers ripped and teared in one local spot on a large print.
What might have been the cause and what can be done to fix it?

awake-maroon•9/14/23, 6:22 AM

The "waves" next to it would hint at a squished layer there. i guess it waved there too, but enough to catch on. check if the bed is planar at that spot first would be my first try.

gywiloOP•9/14/23, 3:21 PM

gywiloOP•9/14/23, 3:41 PM

Second attempt showed some marks on initial layers but didn't continue tearing

SSeriosha The "waves" next to it would hint at a squished layer there. i guess it waved th...

gywiloOP•9/14/23, 3:42 PM

Wouldn't the bed mesh compensate though? Perhaps I need a finer bed mesh here?

awake-maroon•9/14/23, 3:45 PM

yeah, if its not probing that particular area, and also not with high density - which i doubt it does, that would do nothing since it interpolates...

gywiloOP•9/25/23, 4:04 AM

okay, so I've done two tests to confirm this is a not a bed mesh issue and instead something wrong with the surface itself.

I increased bed mesh density so that probeing occurs every 10mm, and still got same result.
I then went back to regular mesh density and rotated the bed surface 90° so that the problem area was in a different spot (back right instead back left)

gywiloOP•9/25/23, 4:05 AM

perhaps the surface has been contaminated in some way or the PEI coating was not applied correctly in this area?

gywiloOP•9/25/23, 4:10 AM

I will try cleaning with hot water and dish soap

gywiloOP•9/25/23, 5:49 AM

I cleaned the build surface and that resolved the issue, able to print clean first layer in that spot now

SYG|Krizalid87•9/25/23, 6:34 AM

With isoprophilic or other special products?

gywiloOP•9/25/23, 2:55 PM

70% IPA then soap and warm water

SYG|Krizalid87•9/25/23, 3:34 PM

soap for hands or for dishes?

gywiloOP•9/25/23, 6:21 PM

dish soap

SYG|Krizalid87•9/25/23, 6:31 PM