Problem with tall prints

[t_marques]

Hello,

I have a Bambu Lab A1 with AMS. I am not very experienced so I am looking for help on maybe adjusting my slicer options or advice on what can also be a PLA issue.

I am trying to print a tall model (16cm) for a prototype, but I am having bad results.

I also have access to a P1S printer and the quality is better than what I can produce on my A1.

The thing is I have been able to print before this model on my A1 with better quality, and now I am getting this weird shrinkage that gets worse the taller it goes.

Could this be excess humidity on the PLA, not enough cooling, flowrate problem or any other thing?

Thank you.

[flint723]

As far as humidity, it may happen though I haven’t needed to dry my pla before. But also am not printing stuff like this that needs precison with PLA.

Is the room cooler now during the winter?

[t_marques]

Sorry for the late reply.

Yes, it is cooler. I also have no AC or anything like that so I am at the mercy of sometimes turning on a space heater. The room is big enough that the temperature will not increase by more that 3 or 4 degrees. Now in the winter the temperature might be between 14 and 18ºC inside.