Can too good adhesion be countered by lower bed temps?

My prints get very good adhesion to the bed, especially when doing prints with large adhesion areas. So good, that after the print is done, I actually have to wet the surface with alcohol and put it in the freezer for it to let go! (edit: I print with PLA)

My question is, if the adhesion could be a bit less violent, if I lower or increase the bed temperature? I have an ender 3 v2 with the original glass bed (it has some black layer on top of the glass).

I know that there are tons of alternative beds that I could buy, but I'd rather keep this bed if I can counter the too strong adhesion

11 comments

You could always try it…

I use PEI instead of glass and find that a thin layer of glue stick works great for helping sticky materials release.
- So you use glue to make adhesion worse? That's very interesting!
  
  Yup. My kid found the idea hilarious when I explained why I’d swiped a washable glue stick from the arts and crafts box.
  
  It hangs on well, but also makes removal easier.
  
  I use the washable gluesticks for my polycarbonate prints. I just put PC prints under warm water for a few minutes and they pop right off. Gluesticks generally reduce bed adhesion though IME, so it's a fine line to walk; I never use gluesticks with PETG for example because then the parts don't stick to the bed enough.
  
  Adhesion can be better, but it also acts as a release agent. If you are printing PETG on glass always use glue, for PLA it shouldnt be needed.
I'm not too experienced with this, though I have the same model, but wouldn't increasing the temperature lower adhesion? Part of the reason it detaches is the thermal contraction as the bed cools. If you raise the temperature more there's a great delta in expansion and hence more contraction. This does require waiting, which can be annoying though.
- I already have to wait with some of the prints only come off If I place them in rhe freezer. It makes good sense though that with higher temperature it will shrink more when cooled. Maybe I should try this. I print at 50c bed temp
New Lemmy Post: Can too good adhesion be countered by lower bed temps? (https://lemmy.world/post/11829420)
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11 comments