HI all, I’ve only been printing a couple months and this just started happening to me yesterday/today so I need your help. Last night I printed the reusable spool from the internal storage and both halves Lifted Up on the side lying on the left portion of the build plate nearest the fan(see pics). Then today I printed a QR code square stand, which printed further to the right of the build plate and came out fine, but qr code square lifted up and I happened to have it laid out on the left side of the build plate (see pictures, I also took a couple still pics from the very short timelapse which shows it fine until the end where it lifts).
Any ideas what is causing this lifting? It hasn’t happened to me until last night/today. Thanks so much! #StillANewb
Is the side-fan running? What filament type? This could be caused by too much cooling. Too much cooling has a similar effect like not enough cooling on overhangs.
Ah, interesting. It’s two Bambu PLA filaments. I’m not sure about the fan, is there a setting I can see in the slicer that would say one way or the other?
I still have bambu slicer open, I clicked the drop down in top right on the preview screen and changed it to Fan Speed and it says 100, but that is talking about the fan on the hot end, right?
It is cold here right now, so if that fan was on that could be the cause since that would pull in the cold air from the room and blow it on that side, right?
There multiple options to control fan speed, but I think what you’re talking about is just the display of what your current settings have told the GCode to do:
As mentioned, this is just a preview and not a place where you will change that setting. You can only see what it will do when you tell it to print.
Rather, there are two other options you might be interested in adjusting.
While the print is in-progress
You can change speeds by clicking the “Device” tab at the top of Bambu Studio. I’ve boxed in red the clickable options in question.
From left to right -
“Part” = Toolhead mounted fan that cools the print as it is printed.
“Aux” = Big fan mounted on the inside of the enclosure that blows over the whole bed (at the print layer). Described as “side-fan” by rovster.
“Cham” = the chamber fan that pulls the air out of the enclosure and through the air filter.
Using the “in-progress” option here means you’ll likely need to adjust “aux” or “part”… probably starting with “Aux”.
With PLA the Chamber fan probably isn’t running anyway, but it could be a factor if you’re running something that needs a steady temp and it’s trying to work against you by exhausting all of your warm air.
The “better” place to configure these fan settings would be per filament or pre project. It sort of depends I guess, but this way you can save those settings and not have to run over to the controls after you’ve started your print to adjust them each time.
That is found here on the left side while in “Prepare” tab:
Then here in the “Cooling” tab when this window opens:
Hope this helps.
ahhh yes, that was very helpful thank you so much!
So, since it’s cold in the house and I don’t want that aux fan blowing cold air on that left side causing the print to lift, should I just turn the Aux fan speed to 0% you think or just trial and error to get it super low but not cause any other issues?
I’ve never had this issue and it’s usually always warm where I live so I guess I’ll have to pay attention to this during the few times it’s cold outside causing the house to be very cold.
Since it’s PLA on a not-too-complex model i’d probably just disable the aux fan and make sure the chamber is closed off. The part fan is still there doing it’s job, presumably, so it should be fine.
Warping away from the bed is sometimes a thing you see when prints have large flat surface area or dense infill. A more uniform chamber temp should help.
It could also be bad adhesion - for the purposes of the X1 (in my experience) this could mean a dirty bed or too much gluestick.
Bumping up the temp about 5 degrees sometimes helps me as well.
wow, I turned off the aux fan, moved the model over to the middle of the plate and the bottom left corner (same area) warped up again! what you said about large flat surfaces, this definitely is one, or the bed adhesion (that corner for some reason) is at play … I just cleaned the surface and put about same amount of glue stick all over … I could bump up the bed temp and see if that helps. hmmm… Thanks for all that info!
I hardly ever print with PLA, but today I had to print something that pla was suited for.
I ran into the exact same issue with the left side raising directly where the auxiliary fan duct is. I have never had so many problems with fans as I have with this printer.
Anyone have better results disabling the aux fan for PLA?
I never print big things in PLaA, but I can imagine that turning off/slow down the fan, especially if no overhangs are around, can help to prevent the lifting. Also increasing infill density can help.
So it’s not just me. Every PLA print (except very small or very short ones) lifts on the left side. I’ve tried different build plates, bed temps, different brands of PLA to no avail. Brims as much as 12mm wide can only limit how far it lifts. I guess I’ll try turning the aux fan off, but I’m not very hopeful since the lifting typically happens after several layers, not when it would be blowing close to the bed.
Just experiencing the same problem with the Aux fan on the side causing lift
Are there any suggestions or after market adaptors to have the aux fan not cause that lift? I’m dubious about just turning it off when printing PLA as presumably the air needs pulling in from somewhere?
Suggest turning it off and opening the door or venting the top lid if you are concerned about air flow.
Question then becomes why is it on by default in the profile? What’s the value? What is is supposed to be doing?
It’s there to add additional cooling. In your case it’s adding too much cooling on one side.
i have the same problem and i turned off my aux fan and it still happened on the left side
@DatZig - On the cool plate when I get lifting two things have fixed it for me - careful wash, dry, and gluestick reapply, and using a brim.
borrow a friend’s temp gun or a flir one thermal camera and see if you have a cold spot like me. also the bed may not be the temp it says it is. I am about to try upping my bed temp by 10C
Dunno if this helps but in my case I got lifting on the left with the cool plate. The default temp for this is 35c. I tried everything but to no avail. I bought the high temperature plate and my warping issues all but disappeared. Default temp for this is 65c. I don’t use hairspray or glue stick. Some models however are prone to lifting. I introduce ‘mouse ears’ in the slicer at the corners to combat this. I believe there is a guide in the WIKI explaining the procedure. I see that the high temperature plate is no longer available. I believe it has been replaced by the smooth PEI plate or the new dual sided textured/smooth PEI plate. Hope this helps
