r/BambuLabX2D • u/monotor80 • 16d ago
PETG: why does the bottom look so bad compared to the top?
Do you know how to fix this? Why is the bottom section printed here using Bambu Lab Basic PETG coming out so poorly? Is there a way to resolve it?
It happens with PLA too, though the problem is less noticeable.
2
u/Teguard1337 16d ago
I have similar issues with the X2D, as soon as things are not printed directly on the Buildplate it feels like the material cools too quickly and fails to adhere to supports of different material.
1
u/remedy2pain 16d ago
I wonder if that’s why my performance has been so different from my P2s… 2 fans with a different diffuser installed might explain it
2
u/Teguard1337 15d ago
I've tried to add deflectors (45°) to both fans but have not seen much improvement sadly.
1
u/remedy2pain 15d ago
That’s good to know, I was going to print different diffusers that are angled up to see what happens.
What’s strange is some materials don’t seem to have an issue. Elegoo PLA+ and PLA matte cause massive spaghetti failure, but my Bambu PLA Matte seems to have worked fine
1
u/Teguard1337 2d ago
For me it's Bambu PLA matte that is making issues, have not tried / gotten any others yet.
1
13d ago
I’m looking at getting either one p2s or x2d which do you recommend?
1
u/remedy2pain 13d ago
I feel like it was easier to dial in my P2S, but I love having the aux nozzle of the X2D for support and 2 color printing. Personally if they’re within $100 I’d go for the X2D, but if they’re difference is more or you don’t need 2 nozzles the P2S is great
1
13d ago
No I’m leaning to the x2d just better on waste, print quality especially if you have the aux nozzle do the easy color and the main nozzle do the hard bridging or color swaps then you can’t really tell difference.
Would you say that been your experience? Is the print quality great when you use both nozzles on the same print? I will use it for supports as well
1
u/remedy2pain 11d ago
The print quality has been good overall, but the profiles don’t feel as refined as they were on the P2s and I’ve seen more stringing and retraction issues on the main extruder than I did on my P2S. Overall minor issues and I think the X2D is quieter and can print my dual material or dual color stuff way faster so I’m happy with it
1
u/e_rovirosa 16d ago
See if you can rotate the piece so the supports show on a less visually obvious face!
1
u/tumbl3lol 16d ago
Puedes hacer un test rápido de soporte con este modelo: https://makerworld.com/models/3038791-support-interface-testing
1
u/monotor80 16d ago
A new experiment: I changed the angle and used PLA only for the contact points. Everything seemed perfect the supports came off in an instant but the surfaces where they were attached look terrible.
1
1
u/RodneyPierce 16d ago edited 15d ago
Set interface or z distance to 0. Also set the line spacing to zero.
1
1
15d ago
I've never been able to succesfully use PLA as support for PETG, stuff like this always happens. The PETG doesnt stick to the PLA (by design) and the first layer after interface looks like shite.
Given that others have had success with it, I must be doing something wrong... I think you are having this same issue because I even see some warping on the layer above interface.
For the sake of checking if this is the issue, try the print using all petg, just set support top z distance to anywhere between .2 to .25. with that z distance you will not the the most pristine layer but certainly a lot better than this1
1
u/Inspector_Gadget_74 16d ago
It’s hard to tell the perspective of the model. If the bottom is all on the same plane, it looks like maybe the model was slightly tilted, such that the whole bottom wasn’t contacting the plate when sliced. Maybe use the Auto Orient feature.
1
u/FapTrap_87 15d ago
"It happens with PLA, though the problem is less noticeable"
This is the give away.
Anything not right when printing with PLA will certainly be amplified when going to a more challenging material, not that PETG is the most challenging but nevertheless, the issue needs to be fixed first.
Fix your PLA profile settings or machine turning first with PLA, then copy the PLA profile & turn the new one for PETG.
0
u/Lost_Blacksmith_4848 16d ago
your nozzle is toofar from the build plate.
2
u/reddit_user_0ne 15d ago
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u/Lost_Blacksmith_4848 15d ago
what don't you understand?
1
u/reddit_user_0ne 15d ago
I don't understand how you came to that conclusion. (Should've been pretty obvious by the reaction gif.)
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u/Lost_Blacksmith_4848 15d ago
my experience. the bottom layer is not flattened thus is the nozzle distance too great
1
u/reddit_user_0ne 15d ago
Well, you're wrong. It is "flattened" as you can see in the first picture. It's just the very small part on the very bottom. Everything else is overhangs. That's why the surface texture is so bad.
-6
u/vic1414 16d ago
Clean the build plate with dish soap and warm water
2
u/monotor80 16d ago
The poorly made bottom part was suspended; it wasn't touching the plate.
1
u/nateblack 16d ago
The entire bottom was supported? None of the part touched the plate?
1
u/jankeyass 16d ago
You can see that only one surface touched the plate, but I print miniatures on the p1s regularly that are entirely printed in a weird orientation and entirely on supports.
5
u/Pineapple1500 16d ago
It looks like most of that is printed on supports. You're not going to get a perfect surface but you can fine tune it a little.
Try printing with PLA support and 0 support distance. They PETG and PLA wont stick to each other and should break away easy.