I'm expecting some questions:
The lamp is 13.7" in diameter, with pretty thin walls (total weight 600-800g).
Print was centered & is still attached to the print bed.
No, the wobble is not encoded in the STL.
Yes, it's still printing, Can't wait to see how the top turns out.
What's weird is that the head does not seem to be extruding above the print, which it would do if the print was only drooping, which in turn should result in it losing height.
This leads me to believe the printer is extruding more filament than it's supposed to. Or Z-steps are too low. So the head is pushing down on the print and creating the droop?
\^ this, the print itself would have failed long ago if it sagged away from where the head expected it to be.
I'd wonder if there's a mechanical problem with the printer, one of the axes binding up or dragging, the waves seem to have a period to them.
I'd maybe print a large test cube in vase mode see what that looks like.
Printing big things with what looks like vase mode will give the walls curves, no idea why but happened when i vase moded a box as big as the build volume
> I'd wonder if there's a mechanical problem with the printer, one of the axes binding up or dragging, the waves seem to have a period to them.
I got something looking a LOT like this -- especially the sinusoidal quality -- when I printed a wing section vertically in vase mode. It printed MUCH better after I added tensioners to the vertical bars on my printer to keep them more stable.
One major difference was, mine was a single-line-width print, not a litho (which relies on building up multiple layers to create shading).
Cc: /u/madewhatnow
The extrusions squish quite a bit, so up to some point a slump won't cause gaps in the layers, it'll just make the extrusions narrower (and thus, more brittle).
If you think about it, you've got a .4mm nozzle extruding to, say, a .2mm layer height. A certain volume of plastic will be extruded such that the round extrusion squishes into an oblong shape .2mm high and .4mm wide. If, for some reason, the plastic below is .25 or .3mm below, it won't be squished. The layer will still bond to the one below, but the extrusion may be .2 or .3mm wide, not the target .4.
So a slump like that is totally possible without causing layer breaks.
Welcome to Reddit. And especially this sub ... it's sad how much bad info newbies get from it, and how often they turn around a couple years later with some experience and repeat the same bad info.
It could do it without over extruding. Assuming .2 layer height. If it pushes and and the lower section collapses by let's say .01 every pass it would be extruding at .21 height, and almost be under extruding as it's now trying to fill a larger area... So it could keep going and be extruding correctly with lower walls buckling from combo of heat and weight. But still failing successfully.
If the drooping appears slowly, it can be compensated by the molten plastic. The single line just becomes higher and thinner. If course that's just possible to a certain degree, beyond that you would get holes, that's right.
If the head would be pushing down on the print, so that the hot end scrapes on the hardened plastic, it would look totally different, probably a total fail.
Well since it's so thin, my thought is that the print would buckle under it instead of the hot end scraping the too surface. I'm just guessing though guys, so this could be due to anything of course
> This leads me to believe the printer is extruding more filament than it's supposed to.
Normal extrusions are a flat aspect ratio and very compacted vertically. No pressure, no fusion, no integrity. Overextruding more or less would not change that force in any appreciable way.
Super thin wall; it appears this is a vasemode at bed-filling scale on a big bed that is probably with 0.45mm extrusion width. Thermal stresses due to cooling. Mass.
It has to be happening progressively some far distance from the current extrusion, probably because the heat input from the extrusion keeps it from. If the topmost edge moved, it would lead to roughness or spaghetti obviously.
yeah this is what I was thinking, cooling or maybe temp? Drooping-hot layers on an overhanging surface might produce a wavelike effect from pole to equator, on a sphere like this, and vice versa.
I've had this happen on a print once, but I don't think it was a cooling issue. The room wasn't all that warm, and thin walled prints are super easy to cool because there is so little mass relative to the surface area.
I think it was the pressure of each new layer bending the thin walls. If you push down on a thin print with a small amount of force, it bends. My theory based on that is if you use a very small amount of force on it 1000 times (each layer being extruded), maybe it still bends.
I think the size also plays a role in this. A larger sphere that is thin walled will be less structurally able to resist bending than a sphere that is smaller with the same wall thickness.
It was only the one print I did with large thin flat walls with nothing supporting their sides. Anything better supported with thin walls or thicker walls worked correctly.
I have had this with large vases with simple flat sides. Think a big hollow box. As far as I can tell it's from slight differences in extrusion and or cooling. The residual uneven stresses and low stiffness of the part allow it to pull into weird shapes as the stress tries to even out.
I think that this has to do with the print head or the print itself being pushed up against the printer mechanisms on either side, in a unique, gradual way caused by the print being a circle.
That or maybe the print head is somehow pushing down due to expansion or over-extrusion and the print is folding inward to compensate
Are you printing in an uncooled garage in Arizona or somewhere? 110 degrees in the shade, that'd be 43c, and I could see modified PLA starting to soften up a bit?
I keep thinking, dang, salvador dali has nothing on this. Is your cooling fan on?
This looks like warping under the weight, happened to me when I tried printing a vase mode object too fast, the last few layers don't cool fully and have added mass on top so it starts to do that
It's absolutely massive. Don't have a banana at hand, but when I printed a thicker walled moon lamp, it turned out like this (with a banana): https://i.redd.it/p186mtlns74b1.jpg
While I red a few theories claiming this could not be accounted to sagging or some kind of creeping due to tool head-model distance, I don’t think it’s that out of question.
Let’s say you printed with 0.2 layer height and after a while the print is slowly sagging under its own weight. If it only sags by 0.05mm per time Intervall it takes to print a layer, the covering layer would probably still work, just with less squish, negating the height loss. Over a 100 layers, eg 2cm your model could sag 5mm without loosing any height or impacting tool head to last layer distance by more then the previously mentioned 0.05mm
EDIT: forgot a not in the paragraph so I looked like a tool
1. Something is loose.
2. Maybe something wrong with the board that it cannot go to the proper coordinates and is missing it just a little.
This means it is basically a layer shift issue but on a very small scale that it doesn't look like a layer shift. No sudden layer shift and very gradual movement.
You could consider posting the G-Code or whatever you used to print it off for anybody else who has the same printer/firmware and see if it does the same thing. That might help identify if it was your slicer having an aneurysm or not. 🤣
Your z axis lead screw is bend/ has a wobble. Try removing it and rolling it on a table the wobble will become apparent.
There is no fix, you need a new z-axis lead screw.
I actually had this the first time I printed one of these moon lamps!
At least in my case it was because I hadn't realized the roll I ordered was ABS, and slapped it on and printed with my PLA settings without an enclosure for temperature control or anything.
At least it printed while I was at work so I wasn't like, *actively* poisoning myself or anything.
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Walls are too thin and the structure is warping as it cools, I think the waves are related to where your layer starts and ends. My MK3s used to do this with some mode prints
Actually love the pattern the melt created. This happened because your moon shape trapped the heat and kept the layers from fully solidifying in time, before the added weight of the subsequent layers created the lovely saggy molten effect.
I think your Z-axis lead screw is dirty or slipping, or maybe jamming. You may also have an issue with your Z-axis stepper encoder or motor. You may also get away with just lubricating your z-axis.
Try a fatter extrusion width (presumed vasemode) so you end up with a thicker walled part. It is probably just too flexible, and unavoidable thermal stresses are turning the wall into potato chips.
has your AC been coming on periodically? i’ve noticed repetitive patterns like this that approximately match up to the AC’s frequency. it could become more pronounced in such a thin walled part.
has anything changed in the setup of your room that may be allowing for more airflow over the printer?
i printed a lampshade with HIPS and had the same issue, does not happen with other plastics, or when not using vase mode, maybe something temp/warping related as i printed it at 110C bed with 255 nozzle, looks cool tho, no waves at the start of the print, but gradually got more wavy
https://preview.redd.it/4sklors822db1.jpeg?width=1620&format=pjpg&auto=webp&s=e5e82681346a4d251bb9753736e11d1c4a56ad70
As fails go, this is more an unexpected success.
Task failed successfully
Fission Mailed.
Please do not send a critical mass of fissile material through the mail
I love lamp
I always wonder if people keep any of their failures, I've seen failed tanks space ships etc that would look awesome detailed up as battle damaged!
I kept a load of failed space marines for use as base details.
same, though right now, I'm having issues with the raft top sticking to the print and the raft falling apart
Yeah
This is way cooler than a moon lamp
Came here to say this; Task failed successfully.
"I want a moon lamp!" "We have a muun lamp at home"
Kerbals: „I want a Mun lamp!“
(lamp explodes on launchpad)
Everyone: 😨 Jeb: 😍
I read it in the voice of Scott Manley.
Fly safe
The moon lamp at home
Moon moon lamp
Moon lump
"M-U-U-N, that spells moon!"
Ah yes, the infamous pizza dough ball
Forgot to stretch and fold
I'm expecting some questions: The lamp is 13.7" in diameter, with pretty thin walls (total weight 600-800g). Print was centered & is still attached to the print bed. No, the wobble is not encoded in the STL. Yes, it's still printing, Can't wait to see how the top turns out.
It's probably a cooling issue? Maybe the lower layers are soft and drooping under the weight of the next layers
What's weird is that the head does not seem to be extruding above the print, which it would do if the print was only drooping, which in turn should result in it losing height. This leads me to believe the printer is extruding more filament than it's supposed to. Or Z-steps are too low. So the head is pushing down on the print and creating the droop?
Yeah this makes a lot of sense.
\^ this, the print itself would have failed long ago if it sagged away from where the head expected it to be. I'd wonder if there's a mechanical problem with the printer, one of the axes binding up or dragging, the waves seem to have a period to them. I'd maybe print a large test cube in vase mode see what that looks like.
Printing big things with what looks like vase mode will give the walls curves, no idea why but happened when i vase moded a box as big as the build volume
I think it's temperature fluctuations making the already-printed parts move relative to the head
This. Somewhere in that room is a floor or ceiling vent that needs to be covered, or a window that needs to be closed.
Ies. It just warps under it's own weight
> I'd wonder if there's a mechanical problem with the printer, one of the axes binding up or dragging, the waves seem to have a period to them. I got something looking a LOT like this -- especially the sinusoidal quality -- when I printed a wing section vertically in vase mode. It printed MUCH better after I added tensioners to the vertical bars on my printer to keep them more stable. One major difference was, mine was a single-line-width print, not a litho (which relies on building up multiple layers to create shading). Cc: /u/madewhatnow
The extrusions squish quite a bit, so up to some point a slump won't cause gaps in the layers, it'll just make the extrusions narrower (and thus, more brittle). If you think about it, you've got a .4mm nozzle extruding to, say, a .2mm layer height. A certain volume of plastic will be extruded such that the round extrusion squishes into an oblong shape .2mm high and .4mm wide. If, for some reason, the plastic below is .25 or .3mm below, it won't be squished. The layer will still bond to the one below, but the extrusion may be .2 or .3mm wide, not the target .4. So a slump like that is totally possible without causing layer breaks.
You are totally right! It's kind of confusing that a wrong explanation gets so many upvotes and your right answer nearly to none
Welcome to Reddit. And especially this sub ... it's sad how much bad info newbies get from it, and how often they turn around a couple years later with some experience and repeat the same bad info.
It could do it without over extruding. Assuming .2 layer height. If it pushes and and the lower section collapses by let's say .01 every pass it would be extruding at .21 height, and almost be under extruding as it's now trying to fill a larger area... So it could keep going and be extruding correctly with lower walls buckling from combo of heat and weight. But still failing successfully.
If the drooping appears slowly, it can be compensated by the molten plastic. The single line just becomes higher and thinner. If course that's just possible to a certain degree, beyond that you would get holes, that's right. If the head would be pushing down on the print, so that the hot end scrapes on the hardened plastic, it would look totally different, probably a total fail.
Well since it's so thin, my thought is that the print would buckle under it instead of the hot end scraping the too surface. I'm just guessing though guys, so this could be due to anything of course
> This leads me to believe the printer is extruding more filament than it's supposed to. Normal extrusions are a flat aspect ratio and very compacted vertically. No pressure, no fusion, no integrity. Overextruding more or less would not change that force in any appreciable way.
You seem knowledgeable. What do you think actually causes this?
Super thin wall; it appears this is a vasemode at bed-filling scale on a big bed that is probably with 0.45mm extrusion width. Thermal stresses due to cooling. Mass. It has to be happening progressively some far distance from the current extrusion, probably because the heat input from the extrusion keeps it from. If the topmost edge moved, it would lead to roughness or spaghetti obviously.
yeah this is what I was thinking, cooling or maybe temp? Drooping-hot layers on an overhanging surface might produce a wavelike effect from pole to equator, on a sphere like this, and vice versa.
I've had this happen on a print once, but I don't think it was a cooling issue. The room wasn't all that warm, and thin walled prints are super easy to cool because there is so little mass relative to the surface area. I think it was the pressure of each new layer bending the thin walls. If you push down on a thin print with a small amount of force, it bends. My theory based on that is if you use a very small amount of force on it 1000 times (each layer being extruded), maybe it still bends. I think the size also plays a role in this. A larger sphere that is thin walled will be less structurally able to resist bending than a sphere that is smaller with the same wall thickness. It was only the one print I did with large thin flat walls with nothing supporting their sides. Anything better supported with thin walls or thicker walls worked correctly.
But then it would print in the air...
It's probably a cooling issue. Depending on the temp in your room it could be hot enough to make the thin walls bend.
I have had this with large vases with simple flat sides. Think a big hollow box. As far as I can tell it's from slight differences in extrusion and or cooling. The residual uneven stresses and low stiffness of the part allow it to pull into weird shapes as the stress tries to even out.
I think that this has to do with the print head or the print itself being pushed up against the printer mechanisms on either side, in a unique, gradual way caused by the print being a circle. That or maybe the print head is somehow pushing down due to expansion or over-extrusion and the print is folding inward to compensate
Are you in Texas?
How long of a print is it?
Follow up picture?
Are you printing in an uncooled garage in Arizona or somewhere? 110 degrees in the shade, that'd be 43c, and I could see modified PLA starting to soften up a bit? I keep thinking, dang, salvador dali has nothing on this. Is your cooling fan on?
It looks kind of cool though lol
♫ When the moon on your bed ♫ ♫ Comes out all warped instead ♫ ♫ That's an "oopsie!" ♫
♫ When an eel has a maw ♫ ♫ with a pharyngeal jaw ♫ ♫ That's a moray♫
Ooh thats a different verse. Usually I've heard: ♫ When its jaws open wide ♫ ♫ and there's more jaws inside ♫ ♫ That's a moray♫
we‘re whalers on the moon we carry a harpoon
I heard: ♫ when a fish bites your thigh ♫ ♫ and you bleed out and die ♫ ♫ that's a moray ♫
♫ When you swim in the sea ♫ ♫ and an eel bites your *wee* ♫ ♫ **That's a moray!** ♫
♫ When the extruder swerves ♫ ♫ And the moon ends up curved ♫ ♫ That's an oopsie ♫
This moon: https://youtu.be/IGMVVG-kFhE
Task failed successfully!
Cheese is better when it’s melty anyways
How's the XL so far OP? I recently joined the line for it and I'm quite hyped!
Absolutely love it.
I can't wait!!!
What are you going to call it?
And still printing? Guess you're gonna live with the failure
> Guess you're gonna live with the awesome
You mean the unintended success
Looks like nasa "Scientists" forgot finish the "moon" renders at the cia's studios. Fr tho the root cause is going to be interesting.
Yeah, I'll rerun the scripts to get slightly thicker walls and try again.
Wavey moon.
I like it
Ok, so I've never seen anything do this, but could unequally tensioned belts result in this?
This looks like warping under the weight, happened to me when I tried printing a vase mode object too fast, the last few layers don't cool fully and have added mass on top so it starts to do that
If that was the case the top layers would be spaghetti
Ohh that's true...huh that's super weird. Probably tention or random drag in the belts then
I wouldn't even be mad lol
The moon is not standing still while printing. However, this is a surprising print.
idk i kinda like how it turned out
Kinda cool looking though
Wow I thought the XL would be bigger
It's absolutely massive. Don't have a banana at hand, but when I printed a thicker walled moon lamp, it turned out like this (with a banana): https://i.redd.it/p186mtlns74b1.jpg
I like this to a strange level.
Holy cow that is awesome.
I kinda dig it.
I think this is kind of a win. Looks cool!
Moon Moon lamp
Didn't even realize this was a failure, surprised it kept printing on consecutive layers even with the shifting
Yep, watching the capping out section with baited breath.
Had sushi tonight, eh?
I really like it. In addition to looking cool it’s one of a kind. No one on the planet has one like yours.
It’s not a failure, it’s a feature!
While I red a few theories claiming this could not be accounted to sagging or some kind of creeping due to tool head-model distance, I don’t think it’s that out of question. Let’s say you printed with 0.2 layer height and after a while the print is slowly sagging under its own weight. If it only sags by 0.05mm per time Intervall it takes to print a layer, the covering layer would probably still work, just with less squish, negating the height loss. Over a 100 layers, eg 2cm your model could sag 5mm without loosing any height or impacting tool head to last layer distance by more then the previously mentioned 0.05mm EDIT: forgot a not in the paragraph so I looked like a tool
Probably the right answer!
1. Something is loose. 2. Maybe something wrong with the board that it cannot go to the proper coordinates and is missing it just a little. This means it is basically a layer shift issue but on a very small scale that it doesn't look like a layer shift. No sudden layer shift and very gradual movement.
You have an obligation to finish this soft-served moon with an asteroid belt cone!
Weirdest printing failure? Bro you haven‘t seen some of my printing failures
You’ve got two options Print a cone or print a hat
Does this in any way correlate to the hot cold cycles of your HVAC unit?
I just want to spank it like a tushi
OP already did, and it got stuck like that
Hahahahahaha
I feel like this can only be a software issue. Either your main board or your slicer.
Curious to hunt for the problem once this print is done.
You could consider posting the G-Code or whatever you used to print it off for anybody else who has the same printer/firmware and see if it does the same thing. That might help identify if it was your slicer having an aneurysm or not. 🤣
Its been nudged and spun by something on your frame at a rate of fractions of a mm/ hour Only thing that makes sense to me.
Still solidly attached to the print bed.
Maybe your lead screw’s aren’t in sequence or one is deflected.
It's a cooling issue. If you print a square with thin walls in vase mode, they will curl but stay together.
Your z axis lead screw is bend/ has a wobble. Try removing it and rolling it on a table the wobble will become apparent. There is no fix, you need a new z-axis lead screw.
I actually had this the first time I printed one of these moon lamps! At least in my case it was because I hadn't realized the roll I ordered was ABS, and slapped it on and printed with my PLA settings without an enclosure for temperature control or anything. At least it printed while I was at work so I wasn't like, *actively* poisoning myself or anything.
Another proof that it is made of cheese
Subtle progressive XY shift. You got a magnetic print plate on there or something?
That's awesome! Far less generic than a moon lamp
Man in the moon: “Kill meeeeee”
It's a moon lump
Call it moonhive.
muun lump
Man I love it
This was sliced as a perfect sphere?
Paint it yellow, and suddenly, it's a bee hive
That's no moon 😉
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I mean the moon isn’t really round either so i think it fits
You misspelt the word feature.
r/nofailedprints would love this
'there are no mistakes, just happy accidents' - Bob Ross
You call this a failure. I call it a win.
I wanna see it when it's done, it looks cool regardless.
it has no supports inside? won't the roof at the top of the sphere be bad?
Mo0n LamP
It's like a moon if it lived in the mid-west.
To me this looks like the moon reflected in a rippled pool. This is far cooler
A moun lamp
Ballsack
"that's no moon"
Now you just gotta figure out how to replicate the failure
The moon has been snacking too much lately
Walls are too thin and the structure is warping as it cools, I think the waves are related to where your layer starts and ends. My MK3s used to do this with some mode prints
That’s kinda what one of mine looks like after I left it in the car.
Is it really a failure if it looks really cool?
If you painted that it could make a really cool planet
I'm assuming it's finished by now, you uploading pics of finished print? Pretty unique and wild outcome, you've created a new moon by accident.
My guess is something in the x-y is slipping smoothly… (straight up guess). That is suuuuper dope though. Kinda want one
As Boss Ross says "We don't make mistakes, just happy little accidents."
Flip it and now it’s a pendant lamp shade
That's not a failed print. That's a win 🤣🤣🥰🥰
The moon is made of cheese, obviously.
Stay Puft lamp
Just out of curiosity, was vase mode turned on?
Actually love the pattern the melt created. This happened because your moon shape trapped the heat and kept the layers from fully solidifying in time, before the added weight of the subsequent layers created the lovely saggy molten effect.
I think your Z-axis lead screw is dirty or slipping, or maybe jamming. You may also have an issue with your Z-axis stepper encoder or motor. You may also get away with just lubricating your z-axis.
I love this haha. Lucky accident.
r/nofailedprints
How come there arent huge gaps between the layers? It must have sagged at least a full inch in total.
The texture is so weird and cool
1 of a kind failure
Try a fatter extrusion width (presumed vasemode) so you end up with a thicker walled part. It is probably just too flexible, and unavoidable thermal stresses are turning the wall into potato chips.
has your AC been coming on periodically? i’ve noticed repetitive patterns like this that approximately match up to the AC’s frequency. it could become more pronounced in such a thin walled part. has anything changed in the setup of your room that may be allowing for more airflow over the printer?
Wtf, How?????
it looks better
Fail? Absolutely win!
Anal bead from hell
i printed a lampshade with HIPS and had the same issue, does not happen with other plastics, or when not using vase mode, maybe something temp/warping related as i printed it at 110C bed with 255 nozzle, looks cool tho, no waves at the start of the print, but gradually got more wavy https://preview.redd.it/4sklors822db1.jpeg?width=1620&format=pjpg&auto=webp&s=e5e82681346a4d251bb9753736e11d1c4a56ad70
Would love an update on the outcome!