Hello Everyone,
I’ve been trying to print LW-PLA for a while now and noticing sprial vase mode tends to “cut” sections of the print off. Screenshot attached. Is this a setting within bambu studio? I’ve read other posts on LW-PLA/Vase mode but nothing about this particular issue or what it is specifically called.
Any help would be appreciated!
What you have there does not look like something suited for vase mode…
A vase mode model basically just has an outer hull and the inside is solid.
I see all sorts of structures in this pic of yours…
It works in Prusa Slicer in Vase Mode as well as Cura, just specifically not in Orca/Bambu at all.
And you are trying to say ?
Totally different engines…
That doesn’t explain “why” it doesn’t work only that it does not and is not helpful.
Ok, the long version then…
You wanted to know how to fix the print problem you have in Studio.
I gave you this info.
Then you state how well it works using other slicers and for obvious reason I am confused but still stated that it is totally different engines and with that you can’t compare the results.
Slicer is not slicer…
So do you want to try my suggestion and use Studio or do want to know why some slicers do a better job with default setting than others?
Only asking as the later would require me to write a rather lengthy explanation that you might not need…
Bit confused here with your statement that I am helpful enough…
I tried it in classic mode and it printed fine other than some obvious issues. This is LW-PLA Plane, which is the bane of Bambu and Orca’s existence apparently. Others on the forum state they got them to print but not without documenting a lot of the process. I followed a 3 part example to get as close as possible but that didn’t fully work. Now that I have it printing in classic mode, I get this issue attached in the screenshot which is total under extrusion but only in that one section and it does not look like that in the preview.
Did you check how the filament expands depending on the print temp and speed ?
It is more like a foam and the print parameters are best if the extrusion rate is basically uniform throughout the print.
The areas you struggle with are the same people struggle with when using normal filaments as here the layer time gets quite big changes.
I have yet to get a printer that does not struggle with this to some degree but for some reason Bambu makes this bit really hard.
Apart from a proper filament calibration I only found limited ways to address this (IMHO slicing) issue.
One is to bite the bullet and to reduce the overall print speed to what is used for those problem areas.
Sadly for foam it usually means you have to adjust the nozzle temp as well to get the require density.
Another thing that works surprisingly well (to some degree) is the discontinuity feature in the advanced settings.
The default value is 150 and works reasonably well for most cases.
Lowering it to 125 or even below 100 results in those sudden print moves and sudden speed changes to be ‘dragged out’.
Not exactly like the acceleration setting, more like getting a mix of slowing down too fast (short) moves and speeding up others a tiny bit.
Have not tried with foam yet but for normal filaments it can help to increase the width of the inner walls, e.g. instead of using 0.45mm stepping it up to 0.55 or even 0.6mm - if the model allows for it.
For example > Instead of using 4 inner walls with the default 0.45mm you could try 3 inner walls at 0.6mm.
The difference is the volume of filament extruded.
For areas where the print speed slows down big time this can help to address the under-extrusion artefacts that often appear.
And for foam I hope it would help to provide the required foaming action so the outer wall will be printed with more ‘support’ from the inner wall.
Some of that was very helpful but still the issue persists only on ONE specific portion of the model. Looking at steps for that specific layer around 416 to 458.(Not layers), and that’s of 898 steps for that specific layer. It’s odd that it is only on that section, layers 2-113. No other area or section of the models has this problem, just that one specific spot.
Update, doesn’t matter if I use arachne, arc fitting, no arc fitting, recommended settings, that one section of the model, thicker (single wall) etc. It just prints it thin no matter what I do…
