Reproducible (at different heights) layershift
Hello fellow 3D-printer-friends,
I have a relatively new MK4S (assembled version) with around 20 hours of operation. Since a few prints, I encounter the following layer shift (see images below). The weird thing is, it occurs only once in a print and even with the same gcode (like just printing a thing two times one after another) the layer "cut" appears at different heights.
Things I have tried so far without success:
- Firmware upgrade from version 6.1.? to 6.2.1
- Generating a gcode in ascii and binary form
- Not changing the print settings in the slicer but reducing the print speed to 75% in the tuning settings of the printer right after the start of the print
So from the little knowledge I have, I would stop searching the issue in the 3D model or its gcode/slicer settings, wouldn't I?
Does anyone may have an idea about that? I appreciate any help.
thanks, kafkif
Best Answer by kafkif:
Hey @strjan,
you were right. It isn't an issue with the printer. I've given the file as well as my remaining filament to my colleague, and they printed it on their non prusa printer. Same result, weird cracks or whatever they are. They also tested to print very very slow (7h instead of 1h30) and it worked.
So either there is a problem with the Prusament Galaxy Black or there is a hint in its datasheet (what I skipped to read) regarding print speed.
Anyway, thanks again for pushing me in the right direction and I am happy that this was not an issue with the printer 🙂
RE: Reproducible (at different heights) layershift
This was fixed in the latest FW. Upgrade to 6.2.2
RE: Reproducible (at different heights) layershift
Hey @strjan,
thanks for your answer. Unfortunately, it didn't help. After upgrading to 6.2.2, I encounter two cuts :S
RE: Reproducible (at different heights) layershift
TBF, it doesn't look like layer shift, rather a crack, possibly from stress in the material.
What material is this? Send the zipped 3mf, someone more experienced will have a look.
Before that, I would check printer location: prevent draft, and temperature changes. That helped me a lot. Also preheating the bed for few minutes is good
RE: Reproducible (at different heights) layershift
Hey @strjan,
thanks again for the answer.
This is PLA - the one that was included in the MK4S package. All right, I will hand the file to someone else.
Your answer also made me check the previous prints with other PLA. And there I see no crack/shift/whatever. Either it is the prusament or the printer took "damage" over time. So I will buy and try the filament I used previously.
Thanks for the hints!
RE:
MK4S, Prusa PETG, Firmware 6.2.x
Result 2 shifts.
Is it time to buy a BambuLab?
RE: Reproducible (at different heights) layershift
That X is too unspecific...
RE: Reproducible (at different heights) layershift
The print is too large (it is at the limit of dimensions). This will never do any good. Try to rotate it to see if it fits diagonally. if not, redesign and divide into parts and then glue. It is also possible to print in a slower mode, if possible with a normal nozzle. It is not clear from the description what the nozzle is (CHT/normal). It might help to attach a 3mf file of your slicer print for review
RE: Reproducible (at different heights) layershift
The mess on the board would indicate a large nozzle and a high temperature when the filament leaks out. It may even be damp. The initial cleaning line at the bottom left already indicates a mess on the nozzle before printing began.
RE: Reproducible (at different heights) layershift
The print is not too large; Did print it over 20 times.
It seems the "Matte Black" Prusament leaks a lot of clumps and PETG is very tough.
I just reprinted it with Prusa Jet Black and its OK; No shift or clumps.
RE: Reproducible (at different heights) layershift
The print is not too large; Did print it over 20 times.
It seems the "Matte Black" Prusament leaks a lot of clumps and PETG is very tough.
I just reprinted it with Prusa Jet Black and its OK; No shift or clumps.
This is O.K.
RE: Reproducible (at different heights) layershift
Hey @strjan,
you were right. It isn't an issue with the printer. I've given the file as well as my remaining filament to my colleague, and they printed it on their non prusa printer. Same result, weird cracks or whatever they are. They also tested to print very very slow (7h instead of 1h30) and it worked.
So either there is a problem with the Prusament Galaxy Black or there is a hint in its datasheet (what I skipped to read) regarding print speed.
Anyway, thanks again for pushing me in the right direction and I am happy that this was not an issue with the printer 🙂