I’m also using a Rambo 1.4
Fire up the board and look at the firmware displayed at the TFT screen, should show something like this.
Make sure you have the machine tight the way it should be, and your cutting bit is also tight before you do any cut.
During LR3 Beta test, and before I cut anything, I level the Z axis using M666 on the X axis, if that make sense.
Take a look at this thread https://forum.v1e.com/t/m666-i-cant-figure-it-out/33402
And I didn’t care about the Y axis, as I knew I would have to surface my spoil board, and probable my Y0 and Yxxxx, would be off by a mm or so on the Z axis. Making it look like I was missing/skipping steps or adding steps (dipper or higher cut) as the machine was cutting into the Y direction.