Hi, I’m relatively new In 3d printing, I have been having a printing problem that only occurs in circular-shaped objects, since it does not occur in the rest of the prints. I have changed filaments to different brands and types and it continues to occur. I have thought about changing the extruder but I wanted to expose the problem before doing so. Any idea how to solve it?
Aah… That is ringing. Bambu printers have epic cooling, but still you can’t expect too much. This large overhang couldn’t be handled by the cooling system. So add support or get a soldering iron to flatten it out.
However, on the other hand, In picture 2 it doesn’t seem like some place ringing would occur. You might have a clogged nozzle or over extrusion. I don’t know. What I ask is that did the nozzle move in that pattern while printing, or the nozzle moves correctly. There is also a possibility that the wall generator is broken.
One way is to watch your print and record what happened. Or can you print a normal cylinder to test it out?
Well, I just learned that part cooling of an X1C isn’t that good as I initially thought. This video shows it very good. So, I ordered such a PANDA JET. Will see, how it turns out.
I’ll just say that again you can’t expect too much from FDM.
Well, development doesn’t stand still and there are always amazing things. I’m not comparing it to SLA. I just wanted to make it clear that good cooling of printed parts is important. 
For small things like this try to print multiple models in one go.
Reduces the overall layer time problems and with that more cooling.
Clearly cooling related issues on overhangs.
I have many questions ^^
Did you use support on this surfaces?
How many walls did you set?
Is ensure vertical shell thickness enabled?
Are those objects were printed alone on the bed?
I’d try to print slower or add more parts to the build plate in order to give more time to the filament to cool properly.
Also make sure that the overhangs have enough support from the previous layer and use external support of that not the case
In your filament profile under the “cooling” tab, you can increase the cooling fan speed for overhangs. You can also change the angle at which an overhang is recognized, if it isn’t being recognized. Elsewhere you can change the speed to slow down for overhangs.
Hi, Henlor,
Did you use support on this surfaces? YES
How many walls did you set? 3
Is ensure vertical shell thickness enabled? YES
Are those objects were printed alone on the bed? YES
Thanks
Thanks, I’m going to try that.
Hello 
The overhangs seems to have enough support.
So it’s definitely a cooling issue.
You could try to add more parts on the bed. That way the layer print time will be longer. Thus more time for the layer to cooldown.
And if you want to print the part alone, you can increase the min layer time inside the filament settings, cooling tab.
Another approach could be to reduce the nozzle temp and /or the layer height. In order for the filament to have less heat to dissipate.
Ps : if it’s PLA/PETG and you have an enclosure. Open the door and/or remove the lid. You don’t want too much heat inside the chamber
Hello, I did what you said and works. I increased the min layer time to 7, removed the lid and let the door opened. and this is the result.
Thanks to everybody for your tips and help.
1 Like
Awesome it’s looks great! Happy printing 
This topic was automatically closed 2 days after the last reply. New replies are no longer allowed.