How to prevent model from peeling off of resin printer buildplate during print? Recently I have started using a fairly large LCD resin printer. (Yidimu Falcon Pro)
It has a fairly large 260x160mm perforated and coated steel build plate and a decent dual rail Z axis with a ballscrew. It has a 10" LCD. It prints ChiTuBox files from a USB stick.

I have been having a mostly successful print, at good quality, but the bed adhesion keeps haunting me. The best print on this machine had parts curling up from the build plate, however most of the print succeeded.


Two times I have had a very well adhering raft, however delamination occured directly after the raft.
Usually the left side lifts from the bed while the model stays on the build plate.


I have tried:

Changing resin (tried Druckwerk Pro D Black and Anycubic Black)


Decreasing lift speed
Increasing lift distance
Increasing bottom layer exposure time (from 60 to 180, as suggested by Druckwerck supplier)
Increasing bottom layer count to 9
Using a large raft
Using a very large raft
Using a very small raft
Leveling build plate without vat in place, using paper
Leveling build plate while keeping vat in place


What would be a good next troubleshooting step?
looks like you have done a lot of work to try to get it working.
considering you are having issues on one side of the build plate my thought is that it is a levelling issue or an issue with the plate itself. Try levelling it using the video &quot;Getting Started: Leveling the Build Plate&quot; it's for a different printer but pay attention to the part where he goes over making sure the left and right sides are level and how to check that. I had a problem like yours, and the issue was that as I tightened the screw to keep the build plate in the levelled position I ended up causing it to move. I made the same mistake a few times before realizing that I was messing it up the same way every time because I'm right-handed. after realizing that it was easier to fix.
If the issue is the build plate it's self it may be a matter of it not being flat (unlikely), Or not providing a good bonding surface. if the latter I suggest you do some research and decide for yourself as there are a lot of dividing views on how to fix that issue.
It also looks like you are having issues with the print after the bottom layers. It could be caused but the separation issue but it could be that you just need to increase your exposure time for your non-bottom layers