Level The Bed Properly on an Ender 3 V3 SE
The Ender 3 V3 SE comes with a PC Spring Steel Sheet and CR Touch. The bed has no knobs so Bed Tramming does not apply. To level the bed, run the assist leveling function and adjust Z Offset as necessary. Before you start, ensure your firmware version is 1.0.6 or later.
Run Assisted Leveling (CR-Touch):

Make sure your bed is clean and free of any debris that may interfere with leveling
Clear out any previous leveling data by Selecting Control > Reset Configuration
From the main screen Select Leveling
Wait for the auto leveling process to complete, your printer will test and set Z Offsets for each of the 16 points on the bed and automatically save the results to your printer. Values that appear green or blue indicate the bed is relatively level. Prints should turn out ok as long as there are no values appearing as yellow or red (> 1.0mm).

Adjust Z Offset for individual points:

From the Catalog, download the 16 Square Bed Calibration test print, which will help you further calibrate your bed level.
Inspect the results and make Z Offset adjustments for the corresponding point from your auto-leveling map
Refer to the First Layer Graphic by Billie Ruben to determine if any of the 16 squares at too high or too low.
All layers consistent exhibit the same issues, adjust your printer Z Offset Value If first layer issues only appear in certain test squares/areas of the bed, find the corresponding squares and adjust the leveling data for that particular spot. The paper resistance test can help you determine if the Z Offset is set too high (indicated by no resistance) or too low (indicated by too much resistance) at the points where the initial layers were not accurate.

If during the automatic leveling process, you observe a significant Z-Offset (value is displayed in yellow or red) at any of the 16 points, or if you notice that one section of the bed differs noticeably from the rest, you may need to make adjustments to the screws on your Y/Z Axis Frame. To do this correctly, start by loosening all the screws located at the top and bottom corners of your printer frame. Then, tighten them in pairs, working on opposite pairs at a time.

Solution

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