Troubleshooting bad looking print

Hi, posting this image of a couple of intersected spheres. I’ve used variable layer heights where the topmost part have zero 0.08 mm layer thickness. I’m curious on to what the bubbliness is about. Have anyone else experience that when you thin layers?


Regards

Björn

Could be the settings for your filament or maybe the infill.

What filament and infill do you use?

It’s a generic PLA, 0.28 → 0.08 mm. 10% grid infill.


Could be the combination from Grid-Infill + 10%.
Try Honeycomb or Gyroid and 15 - 20%

Looks like you have a nozzle temp issue as well. Looks like the majority of the print is matte finish, then the top is glossy. Nozzle temp and speed.

Bump your nozzle temp up 5-10*

Ok aha, interesting. Would the glossiness indicate what in terms of temperature? Too low, too high?

Is this they right place to up the temperature then. on the material settings min + max?

Ok, can try that! will also try to increase the temp

Two more tests!

Both images,
Part to the left: 220°C + 15% Hexagon infill
Part to the right: 230°C + 15% Hexagon infill


I draw the conlclusion here then that the infill was the culprit. Temperature seems to do no difference in this case, Both of them show signs of being more glossy on top where the layers are tighter. Not sure as to why though?

I’m very thankful for your comments, really didn’t know where to start there!

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I am glad you got it worked out. The one on the left looks to have a better overall finish.

Temp can change the appearance of the filament from matte to glossy, and I suspect the slower speed on the top layers gives the filament time to get hotter.

If you had time to do another, run one at 210* to see if the finish is uniform. Ideally I’d print a temperature tower to see where that particular brand and color likes to be set.

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ah, good Idea. That way I can dial in each material.

For temp setting, does this “Recommended nozzle temperature” setting do anything? or will the one called Nozzle below set the temp for everything excep the first layer?

I’m pretty sure that that recommended temperature is just a range that they put in there. The actual print temperature would be done on the settings tab when you’re setting all the profiles for an individual object.

Strange though, because that material settings page I’ve create that material myself. There is also fields for min max. Ideally, the slicer should accomodate the fact that print with smaller layer height might accumulate more heat and adjust for it within the span of the min max.

Not sure what that settings tab is you’re referring too. I just assume we’re talking about bambu studio here? The only place where I’ve found temp settings is on that materials spec page I paste above. Which I reach by pressing this edit button in front of the material in question.

Are you referrings to something else?

I may have been having flashbacks to Cura. I honestly have not printed anything in almost a month, and I don’t have BS on my work computer - where I am at and won’t be home until the weekend.

The first layer temps, and all other layer temps are the ones that should control the print temp.

Actually, increasing that infill back to 15% didn’t solve it entirelly. Last print came out with these notches on the top.

Any more clues on what the problem might be?

In the line with Nozzle first layer and other layer you change temp. The one you marked is only that you get a warning if you go below or above these.

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