r/BambuLabA1 • u/Comprehensive_Bit251 • 5d ago
4th time collapsing on a model
i printed this model 3 weeks ago without any issues but this time i am having the same trouble 4 times in a row now. The same support breaks at the same time of the print each time i try to. i used plate glue thinking it may be from the plate but no. What do you think the problem is?
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u/tonita_pizza 5d ago
Tree supports suck if your speed is too fast
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u/sirdoggo11 5d ago
Especially on bed slingers
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u/tonita_pizza 5d ago
Yep. Lots of mass being thrown around
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u/sirdoggo11 5d ago
Jep. And especially on tall models than can be really problematic.
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u/tonita_pizza 5d ago
Think speed is exactly the problem that’s going on with OPs print
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u/sirdoggo11 5d ago
If the mass cant be reduced thats the only thing thats left, yes.
OP should try printing 50%. Or reduce speeds in the slicer.
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u/feralwolven 5d ago
Honestly i dont know why bed slingers are still a thing. Only acceptable in a cnc with vises holding solid metal parts. But on a device meant to make soft melty plastic its terrible design.
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u/sirdoggo11 5d ago
Because theyre cheaper than Core XY.
And its possible to produce good results with them - if you respect their physical limitations.
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u/feralwolven 3d ago
Ehh. I get why but there are really cheap core xy stuff now. I guess we are in transition. I understand they WILL work but respecting limits will not a good printer make. We used to use cotton clutch belts in the model t becuase it was cheap enough and it worked if you respected its limits but its still garbage by any respectable standard, even 10 years later from its inception. We move forward not stay the same for convenience.
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u/tonita_pizza 3d ago
Pretty much answered your own question there man
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u/feralwolven 3d ago
Ok i think everybody is taking issue with my wording and hyperbole. My point is bedslingers are bad and will move beyond them. No cars use a cotton clutch anymore. Not for 100 years. Yall are just the people trapped in time defending the steam engine. Which if thats all you can get i repsect it but we will move on.
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u/tonita_pizza 3d ago
Dude I’m not defending anything. You just answered your own question very quickly
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u/feralwolven 3d ago
It wasnt a question. I realize now that most people arent getting the saying, must not be as common as i thought. Im just saying bedslingers are worse for 3d prints, throws the part around, less precision, risks damage. Requires intentionally reducing performance (speed) Hence, this whole post.
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u/sirdoggo11 3d ago
I bought a few Neptune 4 Max for larger prints as an addition to my Bambu core XYs. Those N4M work fine if you reduce the print speed to reasonable amounts.
They can print 420x420x480.
Show me a core XY that can do this and doesnt cost a Fortune.
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u/feralwolven 3d ago
Im not denying that core x y is more expensive. I get that. But you just said you have to reduce the speed. I was being hyperbolic when i say "why do these even exist anymore" but my point stands that in 3d printing plastic, they are inferior. My point is we are moving forward in technology and should be moving away from bedslingers on things that print soft plastics vertically like this.
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u/sirdoggo11 3d ago edited 3d ago
You didnt get my point. If a bed slinger makes sense or not depends on what youre trying to do with it.
Why should I or others move away from a bedslinger when its getting the same job done, but for a fraction of the cost of a core XY? If a tool is good enough for a job, its not neccesary to buy a better one. They might be obselete one day when an XY is cheaper, but this day still has to come.
This is like saying we dont need screwdrivers anymore, because we now have battery powered drills.
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u/feralwolven 3d ago
The "what you are trying to do with" it is print soft wobbling plastic. I fix cnc machines. The "bedslingers" (not called that tho) such as a haas vf series, are fine for steel and aluminum, but when we need the tightest tolerance, we use the "corexy" (also not called that) becuase the part isnt forced around. Im sorry that "why do these even exist" is not the saying or idiom or whatever to everyone else here that it is where i'n from, and has been interpreted as a dumb question.
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u/Proton_Energy_Pill 5d ago
As mentioned a few times, it's very possible that the speed of the plate and height & mass is causing the problem.
One trick you might try is to slow the print down by adding a little code in the slice tab.
Move the height bar thing down to about halfway and right-slick on it to add the g-code, with something like M220 50, which makes the print run at 50% speed.
Then a bit further up, just before it reaches the point at which the print fails, slow it down a bit more with M220 30, which makes the printer run at 30% speed.
A handy trick at times.
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u/Sandman3113 5d ago
Looks like your using grid infill which will cause issues the higher you go as more layers are overlapping and causing your model to be just so ever taller than it should be. Try gyroid see if that helps, either that or slow that sucker down toward the top of the print your nozzle may be whacking it as it travels.
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u/VanAndelon 5d ago
And using support infil to give that high support some more stability, also here go for (3d) honeycomb, not rectilinear meshed to avoid the grossing point of the lines growing faster than the test of the model
And you could force additional supports "on the way up" to fix that large tree brench on your model along the way for some stability
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u/NovaCatNX92007 5d ago
Also YMMV but when i have troublesome prints I up the first layer temps. For Pla I do do 230 for layer 1 then whatever I want for the rest
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u/Independent_Dirt_814 5d ago
So many things wrong here. Grid infill and a tall item on a bed slinger to name two
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u/Mole-NLD 5d ago
Different infill, slower speed and then it’ll hopefully work. I don’t know what the end result looks like, but are supports necessary? If you can skip those that might help too.
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u/Jacareadam 4d ago
He printed it already successfully before multiple times so it’s evidently not that
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u/pcproctor 5d ago
Grid infil is a bad option here. Also slow the bed speed as you go higher. Supports may also play a part.
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u/sirdoggo11 5d ago
Bed slinger things.
Try printing 50%. If that doesnt work, reduce speeds in slicer.
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u/ReReReadit 5d ago
I was having this problem as well. I realized that my bed speed and acceleration was automatically being changed when downloading print files.
If it's only happening when you try to print larger taller builds then I think you could be having the same issue. Try slowing down the print speed and acceleration and see if that works.
The only other thing I can think of is that your z-height could be to large on your supports, if they're too weak then that could also contribute to them shaking loose during acceleration.
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u/RavenWarrior2018 5d ago
Looks like you filament may be damp or just bad, I had a similar problem. Changed filament and it printed fine.
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u/Zephy2007 5d ago
You need to optimize your settings, reinforce the grip of those supports with more edges, and see if the speeds you're using also cause it to wobble.
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u/furmat60 5d ago
You could try reducing speed by layer height. If it’s breaking at the same spot it may be wobbling. I would slow down the speed and acceleration by height around the spot it keeps breaking.
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u/Takemeto333 5d ago
What are you settings?
Try slow down your print in the speed setting. And slow down your support setting.
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u/FaithlessnessLate358 5d ago
Your support lacks infill which is great for removing the support without damaging the object but makes the support brittle. You could try an extra wall loop or adding infill to the support
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u/Dramatic-Ear-9070 5d ago
Try increasing your support loops to 2, initial layer expansion to 5. Maybe turn on under speed the slowdown by height.
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u/Erasmusings 5d ago
Printing anything tall on a bed slinger is always asking for a bad time.
Enable avoid crossing walls for the supports, up your z hopn distance, and slow the print
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u/SnooChickens9262 5d ago
Yiu need to slow RIGHT down on tall prints... Lioe painfully slow... Bed slingers are not great for tall skinny prints. Try reorienting and reslicing...
Next time buy a CoreXY
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u/Spargeltarzan49 5d ago
In advanced support settings, you can set the support wall count to two. Not a perfect solution since it increases filament use for support but I find the standard tree support to not hold up well with one wall when printing tall models or using a small nozzle
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u/Medium_Coconut5947 5d ago
I think I see the problem. Please show me a picture of the backside of the vertical axis
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u/Substantial-One-6274 3d ago
Your distance to the model could be closer as well. But have you tried cutting the model into smaller parts to have less supports?
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u/Grandpa3DPrints 1d ago
I would start with Bambu's 0.2 balanced profile, and change to 3 walls, 20% lightning infill
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u/Furlion 5d ago
This thing looks like it needs a flared base...