# single point z-correction after 3-point auto-leveling

On my Monoprice Delta Mini, autoleveling is performed based on three push buttons, on which the printer platform rests: The nozzle moves downwards until one of the buttons detects being pushed down. Using the G29-gcode, this is performed automatically at three points close to the locations of these sensor buttons.

However, even after this calibration, the printer expects the platform at one of the test points to be lower than it actually is. Thus, when printing close to the front right sensor button, the printer "smears" the plastic onto the platform. At the other locations, the printing works fine. Therefore, I cannot simply adjust the overall z-distance. (Multi-point auto leveling gives even worse results since the platform tilts during the probing.)

Is there a gcode-based option to modify the z-height of just one of the calibration points of the autoleveling?

Edit: The bad leveling seems to be a common problem of this printer: