Bed level correction
The Bed Level Correction is a feature that is designed to allow advanced users to compensate for the slightest imperfections in the first layer. This feature can be found in the LCD Menu - Calibration - Bed level correction.
Basically, you are able to have slightly different Live Z values on the Front, Rear, Left, and Right side of the heated bed.
When and how to use Bed level correction
This feature is great once you notice that the printed objects do not stick all around the heated bed the same way. Then you should use the Bed level correction.
Starting from the firmware version 3.5.3, the value can be modified by +/-100 microns (in previous versions it was +/- 50) and even +/- 10 microns can make a big difference. So when you are using this function, make small incremental changes. Just like in the Live Z adjust, negative values lower the nozzle closer to the Heated bed.
For this example, we will be using Live Z value -1.000. We will want to tweak our Left side which seems to be too squished and our Right side is not sticking well.
- So we will be increasing our Left side by +15 microns. In total Live Z in the Left side is 0,015 - 1,000 = -0,985.
- Now we will be lowering our Right side by -10 microns. In total Live Z in the Right side is -0,010 - 1,000 = -1,010.