merci de la réponse
taille du plateau Anet A8 = 220x220
ci joint quelque lignes
#define X_PROBE_OFFSET_FROM_EXTRUDER -39 // X offset: -left +right [of the nozzle]
#define Y_PROBE_OFFSET_FROM_EXTRUDER 19 // Y offset: -front +behind [the nozzle]
#define Z_PROBE_OFFSET_FROM_EXTRUDER 0 // Z offset: -below +above [the nozzle]
// Certain types of probes need to stay away from edges
#define MIN_PROBE_EDGE 10
// For M851 give a range for adjusting the Z probe offset
#define Z_PROBE_OFFSET_RANGE_MIN -20
#define Z_PROBE_OFFSET_RANGE_MAX 20
// Direction of endstops when homing; 1=MAX, -1=MIN
// :[-1,1]
#define X_HOME_DIR -1
#define Y_HOME_DIR -1
#define Z_HOME_DIR -1
// @section machine
// The size of the print bed
#define X_BED_SIZE 220
#define Y_BED_SIZE 220
// Travel limits (mm) after homing, corresponding to endstop positions.
#define X_MIN_POS 15
#define Y_MIN_POS 15
#define Z_MIN_POS 0
#define X_MAX_POS X_BED_SIZE
#define Y_MAX_POS Y_BED_SIZE
#define Z_MAX_POS 240