When the platform is severely tilted, the platform cannot be adjusted by automatic left and right tilting. At this time we need to perform manual platform calibration.
The platform will automatically drop to the bottom to balance the left and right heights.
Then you can manually adjust the platform at four points to make the entire platform more flat, which is beneficial for the quality of the first layer of printing. Or if the platform is already basically flat, you can skip the four-point manual calibration step.
There are 3 built-in model tools in the printer, which can be printed out to help with platform calibration.
Calibration Guide Video
Refer to the picture below and use Model 3 pads to make the left and right balance more accurate.