Can't get bed to level properly I am new to 3D printing and just purchased an Ender 3 V2 about two weeks ago. Since I've got it, I've been having trouble leveling the bed. I've tried watching videos, but they don't say how much friction on the paper is good or bad. I have even tried foil, playing cards, and a business card but still can't tell if it's good enough or not. Then when I would try printing calibration squares and adjust as it prints, but when it prints all looks good when printing the outside ring, but when it gets to the square parts there are bumps on the print from the nozzle being too close. Also when I seem to have corner perfect, when it gets to the center it's too close to the nozzle and doesn't even print. I'm using the stock glass bed so I'm not sure if that could be the issue. This is getting frustrating as I really want to start printing. And I want to save money for other parts and try avoiding purchasing a BL Touch if I don't need to. Am I doing something wrong? How can I get this resolved?
Forgot to mention, I upgraded the springs to these yellow ones on Amazon.
Step 1: stop using paper and get some feeler gauges. The gauge should be able to just barely pass under the HEATED nozzle.
Step 2: What are you using for bed adhesion? I use Elmer's white glue. After you think you've trammed (aka levelled) the bed, apply a generous layer of the glue in a coat on the bed. Let it dry.
Step 3: Verify bed level with a large square print that will cause the head to move to the outermost parts of the bed. Stop the print after a few outlines. Try to remove the print. If some areas are easier to remove than others, apply another coat of Elmer's glue to those areas.
Note: Do not hold down all four (4) corners of the glass bed. The aluminium plate is not going to be flatter than the glass. Only attach the glass to the bed on one side of the bed. I use the side that is furthest from the nozzle.