When I got my H2D a few weeks ago prints wouldn’t stick to the PEI plate.
Bambu sent me a new one and it worked, until today. No changes. All of a sudden prints won’t stick. I tried four different PLAs including a new Bambu Basic PLA.
On these prints it can be noticed the print goes bad before the item loosens completely from the PEI sheet. I assume it is because they already started loosening. I noticed the print started going bad so I have a short video of the end when it loosens. I’ll see if I can upload it somehow. Those are two different consecutive prints with different PLA.
The PEI plate has not been touched by anything but PLA and PETG filament.
That happens with PEI plates as they absorb different additives from the filament and oils from your finger. A wash with soapy water can usually improve the adhesion.
I dont bother with any of that and just use a dedicated cool plate for PLA/PETG, like the Frostbite or Supertack that are still not available. The FYSETC CryoNix is probably the closest thing to that available for purchase today.
If you’re printing pla and petg, try using one side of the plate for one type of filament. PETG on one side and pla on the other. They both leave a little bit of residue behind and we all know how pla and petg don’t stick to each other.
Just wash it, using good old sponge and dish washer.
PEI is chemically reacting to your prints, and its topmost surface is getting “dull” when used, forming a thin layer of harder to stick dull surface. So you have to wash it off anyway from time to time.
If you apply some liquid glue then it’s fine, because the pulling force of the glue would tear itself apart, you would always get a fresh contact surface with glue.
Normally not, but in this case it’s a simple action to try that now you have issues. Mine felt a bit oily when I got it new. Just washed it once and it sticks fine for PLA, PETG, ABS and ASA.
I wash mine every 3-4th print, actually every other print. I’ve had zero adhesion issues. Where is your printer located? Garage or workshop? Could be an environmental factor. If you don’t touch the build sheet with your hands how are you getting it off the printer and removing the prints that are sticking? If you wear gloves make sure they are not powdered.
just WASH IT. Plastics leech out chemicals when they are printed. You can see the oil fog on the glass after a spool of ASA or ABS. You honestly think that isn’t settling on the bed too???
I wash every 10 prints, IPA every other print. I have ZERO issues. If a dish soap wash and IPA don’t do it on a brand new bed, then I use steel wool to lightly scuff the surface. 3200 hours on my X1C textured bed without any glue. My H2D bed has been good without the steel wool, but I wouldn’t pause for a moment if I thought it needed the steel wool treatment.
Just because it should does not mean it will. Often with plate wear and/or dirt + oils it will not stick to the plate, especially on challenging prints like text or small features. Adhesive is a good way to ensure adhesion, but as I mentioned before the proper solution is a polyura cool plate.
