Layer separation? Gaps in walls A1 mini

Since about two weeks I have trouble printing objects with a large surface on the buildplate. The first layers are perfect and later on there are gaps in the walls. I think it is layer separation? It’s happening on different heights, but it looks like it’s always on de right side.
I tried everything I found on the internet about this problem, but nothing seems to solve it. Little bit desperate.
I use an A1 mini, PLA of different brands, nozzle 0.4, the adheshion on the buildplate is perfect.
This is what I tried, in steps:

  • increase temp of nozzle (from standard settings pla 220 to 240)
  • less cooling (last setting was 20%)
  • slowed down printing (until 30)
  • decrease layerheight to 1.6
  • increase flow (standard settings 0.98 to 1.0
  • use external spool instead of ams

There’s no fan in the room or draft.

Is there someone here who can help me?



I know this is an older post but no one commented? You gave very detailed information all the way down to pictures.
Did you fix the issue? People look up these old posts when they Google for the same issue and this is what they find.
Absolutely nothing resolved but people are quick to tell you to Google everything first.

A number of things tried but no mention of drying filament. Too high a moisture content leads to issues like the OP posted but can’t say for certain.

Also, drying is a subject unto itself. Many people do what manufacturers say - stick it in a dryer for X hours at Y temperature but no mention of the crucial metric - humidity. Filament dryers have hygrometers for a reason. You want to dry to a final filament dryer humidity if you want dry filament.

The reason is ambient humidity. It imposes a floor on how dry a filament dryer can even dry filament.

But to me it looks like it could be moisture. The biggest clue is it was printing ok and then it wasn’t. That sounds like a weather change raised humidity. The issues are fairly minor but they can come and go when at the threshold of water issues even depending on the color filament used.