XL not running mesh bed leveling prior to printing  

RE: XL not running mesh bed leveling prior to printing

OK here's a clue....the part I was going to print was originally imported into Prusa Slicer to be printed on my Mk3S+.  The project was saved with the Mk3S+ as the selected printer.  I then opened that same project and simply changed the printer to an XL printer.  Changed nothing else.  Now, mesh bed leveling doesn't happen.  Coincidence?  I don't think so.

There must be a setting in the slicer software than turns ON/OFF MBL, but I can't find it.  Someone please help.

RISPONDI: XL not running mesh bed leveling prior to printing

It's the initial gcode you're missing, go to printer settings, initial gcode, if should contain something like this:

M17 ; enable steppers
M862.3 P "XL" ; printer model check
M862.5 P2 ; g-code level check
M862.6 P"Input shaper" ; FW feature check
G90 ; use absolute coordinates
M83 ; extruder relative mode
; set print area
M555 X{first_layer_print_min[0]} Y{first_layer_print_min[1]} W{(first_layer_print_max[0]) - (first_layer_print_min[0])} H{(first_layer_print_max[1]) - (first_layer_print_min[1])}
; inform about nozzle diameter
M862.1 P[nozzle_diameter]
; set & wait for bed and extruder temp for MBL
M140 S[first_layer_bed_temperature] ; set bed temp
M104 T0 S{((filament_type[0] == "PC" or filament_type[0] == "PA") ? (first_layer_temperature[0] - 25) : (filament_type[0] == "FLEX" ? 210 : (filament_type[0]=~/.*PET.*/ ? 195 : 170)))} ; set extruder temp for bed leveling
M109 T0 R{((filament_type[0] == "PC" or filament_type[0] == "PA") ? (first_layer_temperature[0] - 25) : (filament_type[0] == "FLEX" ? 210 : (filament_type[0]=~/.*PET.*/ ? 195 : 170)))} ; wait for temp
; home carriage, pick tool, home all
G28 XY
M84 E ; turn off E motor
G28 Z
M190 S[first_layer_bed_temperature] ; wait for bed temp
G29 G ; absorb heat
; move to the nozzle cleanup area
G1 X{(min(((((first_layer_print_min[0] + first_layer_print_max[0]) / 2) < ((print_bed_min[0] + print_bed_max[0]) / 2)) ? (((first_layer_print_min[1] - 7) < -2) ? 70 : (min(print_bed_max[0], first_layer_print_min[0] + 32) - 32)) : (((first_layer_print_min[1] - 7) < -2) ? 260 : (min(print_bed_max[0], first_layer_print_min[0] + 32) - 32))), first_layer_print_min[0])) + 32} Y{(min((first_layer_print_min[1] - 7), first_layer_print_min[1]))} Z{5} F4800
M302 S160 ; lower cold extrusion limit to 160C
G1 E{-(filament_type[0] == "FLEX" ? 4 : 2)} F2400 ; retraction for nozzle cleanup
; nozzle cleanup
M84 E ; turn off E motor
G29 P9 X{((((first_layer_print_min[0] + first_layer_print_max[0]) / 2) < ((print_bed_min[0] + print_bed_max[0]) / 2)) ? (((first_layer_print_min[1] - 7) < -2) ? 70 : (min(print_bed_max[0], first_layer_print_min[0] + 32) - 32)) : (((first_layer_print_min[1] - 7) < -2) ? 260 : (min(print_bed_max[0], first_layer_print_min[0] + 32) - 32)))} Y{(first_layer_print_min[1] - 7)} W{32} H{7}
G0 Z10 F480 ; move away in Z
{if first_layer_bed_temperature[0] > 60}
G0 Z70 F480 ; move away (a bit more) in Z
G0 X30 Y{print_bed_min[1]} F6000 ; move away in X/Y for higher bed temperatures
{endif}
M106 S100 ; cool off the nozzle
M107 ; stop cooling off the nozzle - turn off the fan
; MBL
M84 E ; turn off E motor
G29 P1 ; invalidate mbl & probe print area
G29 P1 X30 Y0 W50 H20 C ; probe near purge place
G29 P3.2 ; interpolate mbl probes
G29 P3.13 ; extrapolate mbl outside probe area
G29 A ; activate mbl
M104 S[first_layer_temperature] ; set extruder temp
G1 Z10 F720 ; move away in Z
G0 X30 Y-8 F6000 ; move next to the sheet
; wait for extruder temp
M109 T0 S{first_layer_temperature[0]}
;
; purge
;
G92 E0 ; reset extruder position
G0 X{(0 == 0 ? 30 : (0 == 1 ? 150 : (0 == 2 ? 210 : 330)))} Y{(0 < 4 ? -8 : -5.5)} ; move close to the sheet's edge
G1 E{(filament_type[0] == "FLEX" ? 4 : 2)} F2400 ; deretraction after the initial one before nozzle cleaning
G0 E10 X40 Z0.2 F500 ; purge
G0 X70 E9 F800 ; purge
G0 X{70 + 3} Z{0.05} F{8000} ; wipe, move close to the bed
G0 X{70 + 3 * 2} Z0.2 F{8000} ; wipe, move quickly away from the bed
G92 E0 ; reset extruder position

M593 X T2 F38.4
M593 Y T2 F39.2