Hi,
today I printed my selfmade model again:
SilicaBox
But the result is not as expected. A few weeks ago I printed same model without any problem, the upper face of the floor was flat, clean and perfect.
But now on the surface of the floor I get wierd bumps:
For comparision I have my today printed SilicaBox on the left, and the one I printed a few weeks ago on the right:
I used the same PLA (Bambu orig grey) and same print profile.
Then I calibrated my X1C with all options enabled. But this does not solve my problem.
Do you have any ideas what’s going on here?
The first thing that comes to mind is build plate adhesion issues.
Thoroughly scrub that plate with dishwashing soap and warm water, rinse and dry without toching the build area surfaces and try to print again while watching closely the first two layers
Hi Panamon-Creel,
thanks for reply, but I doubt that it is buildplate adhesion since there is a pattern visible. It is similar to checkerboard where some bumps are up where the others are down.
It seems to be a kind of moire pattern issue:
Moire pattern
If you wash your plate with IPA, but not soap and water, try soap and water as @Panamon_Creel suggested. That is most likely your problem, IPA isn’t good enough to wash all the oils off the plate. So many people come here thinking IPA is good enough and when they follow the soap advice, their problem is solved.
If you still have the issue, then come back here.
This is something I see with an uncalibrated filament profile.
I generally use Polymaker filament and stick to one type; however, I see this happen when changing reels that are not of the same batch. Following a recalibration, the issue generally goes away, for me, at least.
Humor me and try a thorough build plate cleaning
Thanks to all trying to help me,
now I cleaned both sides of the builtplate with soap. Each side two times!
Then I created a simple object and used a different PLA (original bambu white) to exclude any object and filament based issue.
But still I have this wierd bumps. I took two photos after 1.5 layers:
As you can see the bumps are still there.
I cannot believe since a few weeks ago the X1C performed excellently. I did not change anything and now I have this wierd bumps. What I wonder is that hey are kind of patterned. As I mentioned in the beginning checkerboard or at least regular.
Can it be some frequency or mechanical issue (even if I calibrated the whole X1C two times)?
The printer I don’t use very often, almost once a week for max. 1 hour so I don’t think it’s worn out.
Any further ideas?
For some reason, it is working again:
I did not change anything. Only thing I did one more time a flow calibration, but I doubt that this was the reason since I already did it before.
And this kind of regular pattern I doubt that this is caused by flow issues.
Anyway - I am glad it works again. If the problem comes up again, I will come back.
Thanks to all for any help!
My guess is that when your plate wasn’t clean, the flow calibration was incorrect because you didn’t have proper adhesion.
@SimEyeSee,
as I mentioned I cleaned the plate two times with water and soap.
Then I did another test. The images show the wierd bumps again.
So cleaning was not what helped! And I really wonder why a not clean surface will cause suche regular patterned bumps. If the plate was not clean I expect the model not stick to the surface in certain areas. But not in that kind of pattern.
So I still really wonder what this was.
What I meant is that when you initially did the calibration, your plate was dirty, so the imperfections in the layer adhesion made your calibration incorrect. So after cleaning your plate, you first tried to print with your previous faulty calibration. Then you did a calibration again with a properly cleaned plate, which gave you a good calibration value.
That kind of wavy “Pillow” pattern is know to me and it indicates that the first layer becomes partially delaminated from the build plate in combination of possibly too much material flow/volume for the true build plate to Nozzle distance for the initial layer. If the build plate adhesion is good and there is too much flow then you would get a kind of pulsing horizontal ZigZag pattern that gets worse the more it moves inward from the nozzle starting corner.
was the filament wet? Maybe it needed drying?
Over extrusion, pure and simple.
