Getting PLA to stick to a cold bed
Right now my heated bed is down and I had no time to try and fix it and I am trying to print something for a friend. I am having the PLA lift around the edges which I have NEVER experienced. The glue is not helping like it did with the heat. And I also tried rubbing alcohol on the masking tape I use, heard that helps and it was not that much better than the glue stick. What can I do to keep the plastic sticking to the bed during print.
I will note that the lift is not super bad, but I do like the littlest of lift on any print.
Most of the same reccomendations that apply for adhesion to a hot bed apply for a cold one. The first ones to come to mind:
- really dial in the nozzle height
- make the first layer taller than the rest (e.g.: 0.2mm if the rest of your print is 0.1mm)
- print the first layer very slowly
- print the first layer at higher temperature
- use a brim or a raft (on my first printer, that had no heated bed, rafts gave the least deformation)
- turn off the part fan for the first layer
- adapt your model to reduce twisting forces (relief cuts, print it in parts, choose orientation wisely, etc...)
If your slicer has this feature, you could also try to print with a shroud.
Fresh 3M blue painter’s tape coated in a watered down solution of Elmer’s white glue works wonders - even when cold - for PLA.
The tape needs to be re-applied and coated for each print for it to really stick, but it beats every other print surface I have tested for PLA other than PEI @ 70 °C. I’m guessing it has something to do with microscopic surface fibers on the tape...
(I like to print PETG as well, and that sticks too well to PEI, so I use blue 3M tape for both.)
I print onto painters tape on my unheated bed... so yes, this works, but the gliue is overkill XD