After some tweaking with settings and ironing, its coming out very clean on the new x2d. The old one could not match this. Maybe your machine is an earlier model like my old one.
Finally, after months of struggle, my prints with the X2D are starting to look as they should.
My ticket with Bambu support took quite a long time to resolve the issue with under and overextrusion, and the solution to the problem was to replace my X2D with a completely new unit.
The new one, which arrived just yesterday, produces much better results straight away, and this is how the part I’ve been using for tests looks:
There is still some minor underextrusion in some areas of the print, but I’ll take it as it is. Earlier in this thread, I uploaded the same part printed on the X1C, which to me delivered a better result than this one.
I would need to give a lot of kudos to Bambu support. They were really supportive, responded quickly, and provided great service. Absolutely great experience with them.
@Vulc I’m not sure where you ended up with your issues, but perhaps a similar solution to mine is needed for you as well.
We were told here on the forum – not only in this thread, but also in other threads – that we had no idea what we were doing and that it was us not knowing how to calibrate the printer so it could deliver good results. My recommendation to some would be to sometimes reflect on their contribution to this space and try to look at things from a different perspective.
Interesting thread. My X2D is my first 3D printer, so I have no basis for comparison, but I can say that my prints do not exhibit the variability in extrusion that I’m seeing in the photos. As the info in the thread seems to be suggesting, I suspect that people having this issue have first gen X2D printers. Its unfortunate that BL would do this, but it seems that if people complain, they can get a new one.
Now, I will say that my printer consistently very slightly under-extrudes. After briefly messing around with roll-by-roll filament calibration, I decided it wasn’t worth the time invested. Part of the problem here is that BS is not efficiently organized for creating optimized and calibrated filament profiles and then tagging filament rolls with the calibration info. If BL can assemble all the filament settings and calibration tools into one place in BS and then make it easy to organize and associate the calibrated settings with particular filament rolls, I’ll try again.
I pointed out the slight under-extrusion to Bambu support after getting the replacement unit and received an interesting answer from them:
"Regarding the minor under-extrusion you noted on the model’s surface, this is related to a firmware issue concerning the part cooling fan management. Please be assured that this is currently a known behavior and is not a hardware fault with your printer.
Our engineering team is already working on a firmware update to optimize this cooling behavior, which will be released in a future version."
So I suppose they are working on it. Let’s just see how long it takes until the problem is fixed and we get improved firmware.
Good to know as currently my printer is experiencing this minor issue, its not a big problem but it definetely needs a fix as the X2D is supposed to be superior to the X1C.
Yeah right, cooling behavior will fix the under extrusion, sure!
But they are right the cooling behavior need to be fixed for sure. As I cannot even stop the fans if I will open the lid and the door.
According to this guide mine is also version 1:
And if they brought out version 2 so quick it is kind of clear that 1 was not so good to say it kindly.
I’ve got a “V1”, and its worked flawlessly since first print.
I ordered my X2D on 06/13 from BL, so I suspect that any difference in build quality is not related to any changes to the printer associated with this feature change.
I also do not think feature change have something to do with all the reported issue. But if you are making second revision even before you have 2-3 FW levels for revision one this means you are out of parts for this revision and/or you are fixing things which can not be fixed with FW. And hope users somehow will deal with that.
In the last days started to print actively and yesterday tried one prototype. It got horrible under extrusion in the first few layers. This is with brand new BL PLA Basic white, freshly calibrated both advance and rate! And of course this was playing on my nerves and I decided to try some stuff. Played around and reread some calibration and first layer fix topics. Looked in the menu and saw manual first layer calibration. Which give you the option to manually set the Z offset +/- 0.05. I have set it to -0.02 out of the blue and to give it a try. Then gave it a fresh low + high temp calibration, which seems to made a lot of calibrations like 2x times fast and 2x times slow with more precision. Then made a primitive cube 200x200x0.2 and started a print. It again did at least two bed calibrations, not sure why it did more then one, as I have just completed the calibration prior that. I have the auto bed calibration from the print menu at - ON. Then it printed absolutely perfect first layer, which has amazing adhesion between the layer lines, and to the plate! I am not sure if the -0.02 ( should be 10% from 0.2 layer) could make such a big difference, honestly I do not believe so. Or just because I have touched it, it did some internal reset/init, and this time it was able to calibrate properly?
I am try to figure out what was that?!?!?!?!
Currently reprinting the same prototype which had under extrusion on the first layers and it comes out great.
For the calibration for the flow rate I picked 0 patch, which is basically the default flow for PLA Basic - 0.98.
Lets see now how will be the top layer part. WOW
Brand new X2D printer, fully updated, fully calibrated - after a few days started printing horrible looking top layers. Using plain bambulab black PLA. Is there any consensus on how to resolve this? (cant upload images or links but hxxps://i.imgur.com/F4RVw2D.png is a sample)
I will attach it for you:
This looks similar to my issue with the bad setting for the bridges, which make roots like sticking up and break trough over the next layers, And/or make such little hills and peaks. This looks more like bad profile settings, which may be by default! As the X2D profiles are hit or miss.
Try some standard detail like cube or such and see if the issue persist. And you can watch for bridges over the infill if they start to fall down and stick up. There are bridge settings which seems to be messed.
@JamboBambu thanks for the tips. I think I’ve found the problem and solution.
My issues started when using 0.16mm high quality and raising the infill. In these samples we have (left to right) 15% infill which looks good, 75% infill which looks bad with the default bridge flow 1.5, and 75% with bridge flow set to 1.0 which seems to fix the problem.
Great! I think in my case also brining back bridge flow from 1.5 to 1 make it better. But 1.5 was the default value form Bambu!
I can see also some under extrusion in the left most patch. Exactly as mine used to do.
For the under-extrusion issue, is there a chance your spools have high rolling resistance?
I’ve been having a lot of issues on the top layer as well. This has been a downgrade from my p2S where I could just print and forget with the default settings when using bambu lab filament.
I’ve tried:
- cleaning plate
- Drying filament (Bambu lab PLA Matte) through ams 2 pro for 13 hours before printing.
- Offset nozzle by -0.01 to help first layer gaps. (Helped first layer but didn’t fix top layer)
- Full recalibration of the printer.
- Only tried main nozzle, haven’t tried aux nozzle.
- Reseated the nozzle.
Any further suggestions or ideas? This specific print is the laziest of susans on makerworld (sorry not allowed to attach links) but I have seen this across all my prints.
Pics: https:// postimg.cc/gallery/zvYBqxP (i can’t wmbed pics or images, so remove space before postimg to see the album)
I do not see any signs for this, it exist on both extruders and AUX is directly fed, and I have never had any issues with the feeding the main. Also it happens always in specific places. Like never on the edges or on the walls. Mostly on the top and on the bottom around and a bit of the middle. Not of the plate but on the detail. If detail is complex I may not get any. If I have many flat areas I will get a lot. You can see from my profile all posts with pictures, I have uploaded a lot. I am wondering if the problem is in the extruder, it maybe relate to some slip, but in never shows on the walls.
But after the last calibration with manual Z offset I see first layers that I never saw before. So this should exclude the extruder or feeding errors, maybe?!!?
Now today I did gave it one step back from -0.02 to -0.01 on the first layer Z offset. As with -0.02 I am having hard times to remove the PLA parts from the plate while I am using glue 
. And by default they just fall off from the bed when they cool down.
Just finished the calibration cycle + one one layer cube to check the quality of the first layer and it looks good so far. So I am now with -0.01 offset. Lets see how it goes.
EDIT:
I can confirm now even with Z offset -0.01 the first layer is good, but a bit easier to remove.
Do you have the filament calibrated after the setting Z offset -0.01?
When you toggle advanced settings in bambu studio you will get option to tweak the top/bottom extrusion multiplier. Or maybe to get it there you will need to enable developer mode from the preferences. So you may try to give it a bit more to the top. as you have now the bottom fixed?
So you may try to gave it 1.05 or 1.1 to the top and print some test.
You can create small cube primitive for the test like several layers thick. Then correct or print it bigger for more testing.
How do you know if you have version 2?
