I have a RAMPS1.4 running Marlin-MPCNC_Ramps_T8_16T_LCD_32step_DualEndstop
I uncommented the manual mesh bed leveling and set it to a grid of 4x4
However I get a jump of about 5 mmm in z height 3 quarters along the y axis, at every point across the x axis, coming back in drops down.
I’ve played with using the g29 s3 to make a mesh
test 1. 4x4 grid
high (8mm) Y to low (0mm) Y
test 2. 4x4 grid
high (8mm) X to low (0mm) X
both work with smooth transitions.
However with my correct mesh loaded and the maximum different only 2mm it jumps.