- What printer are you using?
- What filament brand?
- Did you tune your filament profile?
- Don’t assume that out of the box means dry, although PLA is not very moisture sensitive it is not immune either. To be certain, did you dry your filament and more importantly, weigh it before and after drying just to measure the amount of moisture you’ve removed? (weight is inaccurate if it’s a cardboard spool)
I’m seeing two problems to chase. The first is uneven layer adhesion. This could be due to many factors so I won’t go into all of them. The second is uneven filament cooling or feeding.
The second one is easier to test so I’ll cover that first. Create a simple cylinder primitive about 50mm wide by 50mm tall. Set the bottom layer to 1 and the top layer to zero. Then print it in vase mode. If you do not get pristine walls, then I would chase either a filament problem(try another brand or filament type).
If it’s a feed problem, try cleaning and lubricating your lead screws and pulley with a small amount of PTFE lubricant. Avoid over-lubricating as it can cause long-term issues. Grease tends to accumulate dust and contaminants, worsening the problem. Instead, use no more than 3 drops of Synthetic PTFE lubricant oil on each screw after thorough cleaning. Spread it evenly and avoid excess. Over-lubrication can lead to abrasive contaminants accumulating over time, defeating the purpose. Be careful to avoid getting lubricant on the pulley or belt. Bambu suggests lubricating pulleys only at the bottom, typically when squeaking occurs.
For Layer adhesion. Have you tried the following, one at a time?
- Increase nozzle temp.
- Change layer height to something else to see if it has an affect on the layer lines you are displaying.
- Disabling or changing the part cooling fan settings.
- Turn off your chamber fan or Aux cooling fan.
- Ensure that you’re chamber isn’t too cool.(sub 25c)