Every time I print threads or a cone shape like in the image or similar it never prints correct and left with what you see in the image.
Iv tried slowing down overhangs, slow fan, fast fan, extrusion width… followed guides on here and nothing will resolve it.
One of the reasons I never print things with threads as they have never worked.
Anyone seen this and actually resolved it please?
Thanks.
A pic of what the model is supposed to look like would help.
Hope these help, but as I say, its happened on all threads on any model since iv owned the printer, why I don’t bother printing them really with threads as they fail and I have to cancel the print.
Looks to me like filament needs drying, flow and PA and temp need to be better calibrated after the filament has been dried. Do the manual flow/PA and temp calibrations, don’t rely on the filament defaults.
Maybe you could try slowing down the printing speed so the filament has more time to cool down
All that is done, I do that with every filament.
Been printing over 5 years and this is the 1st printer I have owned that wont print threads, I have seen many others with same issue.
Well…, this is terrible top surface quality.
There’s no magic here for your problem. You need to address the poor extrusion quality evident everywhere, before you can even begin to ask “is there something more I should be doing?”. And if you successfully correct the generally poor extrusion quality you might find the issue you’re having trouble with now just goes away on its own.
Thats not a top surface, in the image is support, on top of the support is is a print stopped around 25% into the print.
But looking at the image close you have posted, Im not happy with them lines, never spotted that.
Almost 4am here, but in the morning will do a flow calibration.
Is it worth doing PA if using the auto at start of the print? Ive done both in the past and saw no difference, so stuck with auto.
Auto has some repeatability issues. You might get a “balls on” calibration, or it might be off by some percentage either way. I think BBL says 10%. I haven’t really made a study of it, but some filaments seem to auto calibrate better than others. Maybe just a function of color, I don’t know. If I just want to bang out a print with some new filament I give it a chance. But if I want the best print I can get, I never rely on the auto calibration stuff. Flow and PA and Temp manually. After drying.
Thanks very much, will get on with that now.
When I had my full manual printer I did everything, got the bambu and 99.9% of users when I bought said to just leave it to auto as its better, I never really came into problems other than printing threads with my A1.
Thanks again for your help and time.
I would suggest to check the g-code layer by layer. I’m sure you will find some outer walls starting mid air.
I am not sure why but my X1E is doing the same thing now when trying to print threads. It worked perfect out of the gate. Now, when printing the same model, the inner threads peel just ever so slightly. The only two things that have changed are the bambu lab update and I am now using bambu filament, which before I was using Matterhackers build filament. I am not sure which one is causing it.
How are you perimeters/walls ordered? Make sure when printing overhangs you’re printing inner walls first, then outer. That way the outer walls have something to stick to.
Are you sure you are using the 0.4 nozzle? I had weeks of problems until i noticed i forgot to place the 0.4 nozzle back and was printing with 0.2 nozzle 
Interesting… Im about to do a test after manual calibration.
lol, 100% using correct nozzle, I only own a 0.4 
What printer firmware are you on? What slicer version are you on (if using Bambu Slicer)?
I ask because the latest few updates wrecked my prints for no reason, I reverted back to previous versions of both the firmware and slicer, prints went back to being flawless, on my X1C.
Try enabling ‘avoid crossing wall’ in the slicer
Also that photo looks like the filament is not melting properly, what temperature are you printing at, those are really thick extrusion lines which don’t look melted together. Looks like you are printing too cold, Can you try a Bambu PLA to rule the filament out. Also try avoid crossing walls, that will stop the extrusion path jumping across the internal thread
All update to date on firmwares on Printer and Slicer.
Avoid crossing set to 200mm has been enabled since it was added, im not sure if they are correct or not.
Extrusion is set to 0.42.
After calibrating the filament it has printed much better.
