flexi-bot/docs/marlin/_gcode/G042.md

tag	title	brief	author	since	requires	group	codes	parameters	examples
g042	Move to mesh coordinate	Move to a specific point in the leveling mesh	ManuelMcLure	1.1.2	HAS_MESH	calibration	G42	tag optional description values I true The column of the mesh coordinate tag type pos float tag optional description values J true The row of the mesh coordinate tag type pos float tag optional description values F true The maximum movement rate of the move between the start and end point. The feedrate set here applies to subsequent moves that omit this parameter. tag type rate float	pre code Move to various points on a 9x9 mesh G42 I0 J0 ; front left corner G42 I4 J4 ; center G42 I4 J8 ; back center G42 I8 J8 ; back right

The G42 command moves the nozzle to the location corresponding to a specific coordinate in the bed leveling mesh. It operates similarly to the G0 and G1 commands except that the provided coordinates are a mesh row and column instead of an absolute or relative position on the bed.

The G42 command will determine the bed position that corresponds to the provided mesh row and column and move the nozzle to that position.