Printing failures at a defined height
Hiho,
when i print with PETG every print shows the same problem, that the first few layers are printed well. When the printer reaches round about the 4th / 5th layer it makes failures on the object, it seems that it has no contact to the lower layer?!.
You can see the issues I mean on the pictures. I have printed the part several times, on every one the same problem.
I printed the same part with PLA, there were no such mistakes in the printed object!
Has anyone an idea why this happens?
RE: Printing failures at a defined height
I've seen this when a part warps, and when the plastic isn't adhering to the previous layer. It looks like the latter.
Increasing the nozzle temp usually improves the adhesion; or, try turning the print fan off for the first few layers.
RE: Printing failures at a defined height
As you can reproduce this issue, just watch it printing and you will see what's happening. We can only guess because no information is being provided. Slicer/Settings/Printer...
Based on the picture it can be everything. Speed, Temp, Object/Slicer error ...
Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram
RE: Printing failures at a defined height
Petg use honycomb infill. I always have the nozzle hitting the infil, with honycomb it is less, also slower speed should help.
print slower,(infill is often way to fast on presets)
and or more heat
RE: Printing failures at a defined height
Thanks for your ideas!
Till now i have checked all of them in different ways, but every time it did not get better.
I have printed several objects (this one shown above, and some other objects, too) with different speeds, up to 30mm/s. The result was worse than before.
Even with different print temperatures the same: My highest temperature was 260°C (nozzle) and the result only got worse.
The deactivated fan had no effect, too.
The combination of every setting could not make it better, too.
And several tries with different infills, .... just the same.
After several tries to observe the printer at these layers I could see, the printer brings the filament out, but after the curve the filament line jumps away from the upper layer and looks like shown above. So the line does not adhere correctly to the lower layer. It seems to have something to do with the issue from my other thread about not together holding layers where the results are even the same. ...
And at least, because it was asked:
I have the MK3S which ran quite good, some weeks ago, so the assumption is close that something arround the upgrade from MK3 to MK3S made something worse.
I have the Firmware 3.7.0 and will check for the next prints the new one 3.7.1.
Additional i have the MMU2(S) but although it is installed, till now I could not print anything in multi material because i first have to clarify the issues I currently have.
My next steps will be to make a factory reset and test FW 3.7.1
A friend who has a 3d printer, too, will check the print with my filament and the same model next week.
RE: Printing failures at a defined height
Solved with factory reset and deactivated fan.
Solution same as for topic
RE: Printing failures at a defined height
Failure at same height and Layer Delamination are NOT the same issue. Garbage in == garbage out, as they say.
RE: Printing failures at a defined height
This issue has the same solution as the other thread, because the printing problem at the defined height is caused by the layer adhession after the 5th layer. I explain it to myself like this: After the layer 5 the printer started with the infill, which seems not to stick very well on the underlying layer. Inside the object this is not to see, but at the embayment the filament lines of the shell break away and lie above. After a few layers the infill structure was implemented and the following lines can hold better so the problem does not appear further more.
With a deactivated fan the layers stick together and no lines come off furthermore.