Except no one’s aluminum plate be is being bent permanently. You’d have a difficult time “bending” a 250mm x 250mm sheet of aluminum permanently by fractions of a mm in different spots on the bed (especially when aluminum soften right up the next time it’s heated).
Exactly. It’s got to be the plastic frame.
995, have to go to bed, too bad 
Hey @Banbuteam what do you offer for the 1000th answer ? A flat bed ? Just kidding 
It’s me.
No it’s not.
Are you sure it’s not?
I tried my version. But its to heavy. The printer errors when I try to Home. Error Code 0300 0A000 0001 0001 "The senisivity of heatbed force sensor 1/2/3 is to high.
Only with a mirror and a printplate, he home all axis.
Is the outside plastic section higher than the metal section of the bed? At the same level? Lower?
Winner, winner, chicken dinner.
It should be the same height, or minimally lower, but for some people it seems to be a bit higher.
It looks lower in the picture above. But, it could be the angle of the picture. And then I guess it could differ on different sides of the bed.
The reason I’m asking is I’m thinking of removing the magnetic layer and laying a 3 mm sheet of borosilicate glass directly on top of the metal section of the bed. If the plastic section is lower or at the same level, it could be used to prevent the glass from sliding around on the bed. Some type of clips will most definitely be needed for the front of the bed though.
Mines pretty even. I don’t think the magnetic sticker was up on the high edge. I mean it may be the sticker. Mine was def high at the edges not the middle. Only thing I can’t check so far is the sticker. Well see when my new sticker comes how that is.
I’ll try to pull the bed and housing apart later. I wana see if the plastic housing is stiff enough to deflect the bed. Iffy but may be enough.
I unbent mine “permanently” like 200 posts ago.
After removing it and using brute force. Yours was changing shape by almost 2mm in the middle, which appears to be an outlier and not the norm for people with warped beds. Your plate was probably actually bent to begin with before it was assembled.
When I said no one’s plates were being bent permanently, I meant the fluctuations of fractions of a mm in the surface due to heating and cooling were not permanently bending the plates. Yours probably still fluctuates now, just in fractions of a mm, instead of the almost 2mm like before.
So, finally managed to get my V1 done of my simple, snapon, toolless holder for precision gauges.
It should make it much easier to get a decent and precise measuring of beds without the need to perform any changes to the toolhead, though I am also working on a version to mount onto the toolhead for a more automatic measuring.
Happy to receive feedback and ideas to improve the design before I put it to public.
Aluminum plate itself was up to like 0.7mm IIRC when hot. The rest was due to edges lifting up because they sit on plastic.
Can you modify it to attach to the extruder so we can move it around? Maybe take the magnet cover off and stick it on.
You can move it around already, though not in an automatic manner.
I am also planning on a version that replaces the nozzle so have full motion ability of the printer, the the toolless version is a quick and easy way to get measurements that does not require you to modify anything on your printer.
Yes, I was able to permanently adjust my plate by fractions of a mm. With a lot of force through a tool. See post #780, where you can see pictures and a video of the result. So far, the shape of the plate and also the texture of the magnetic sticker has fortunately not changed.
Would it possible to give some measurements from the plate ad the holes?
Did you proceed with the disassembly?
Nop I did not and I probably wont, I usually love disassemble printers and electronic stuff etc… but when it come to the Bambulab I don’t want to hurt it actually, usually I got more pleasure on modifying printers than printing with it, but not with the Bambulab, that’s said how much they have done great job.
Also I am sure it is not necessary to disassemble it to make the bed flat, there are really plenty of options to do that, and It will be better/easier for other users to use a solution that dont requiere to do so.
I cant make measurment right now because I have put back a magnetic sticker, but as I will try another solution that weekend that will require me to remove this sticker I will try to not forget to make some measurments on the aluminium plate.
EDIT: If you are in hurry and have some knowledge in photoshop or other image software you can remove the perspective from the picture I have posted and knowing the size of the plastic frame you will be able to measuere anything you want from it
