Bed no Longer Levels in a Grid

  • First couple of prints using the included Creality slicer, the machine would autolevel using multiple points in a grid format.

    I started using Cura 4.8 (CR-6E profile) and copied over the start and end Gcode; however, now the machine only probes one point in the middle of the bed.

    I returned to using the included Creality software, but again the machine would only probe one point, in the middle of the bed.

    Start Gcode I am using:
    M75 ; Start Print Timer and Engage Fil Sensor if USB Printing
    G92 E0 ; Reset Extruder distance to 0
    G1 E-2 ; Retracts filament to prevent blobs during probing
    M84 E ; Disable E Motor for probe accuracy on direct drive systems
    G28 ; home all axes
    G28 Z ; home Z to get more accurate Z position
    G29; EZABL mesh generation
    G4 S15; wait for heaters to recover

    M117 Purge extruder
    G92 E0 ; reset extruder
    G1 Z1.0 F3000 ; move z up little
    G1 X0.1 Y20 Z0.3 F5000.0 ; move to start-line position
    G1 X0.1 Y100.0 Z0.3 F1000.0 E15 ; draw 1st line
    G1 X0.4 Y100.0 Z0.3 F5000.0 ; move to side a little
    G1 X0.4 Y20 Z0.3 F1000.0 E30 ; draw 2nd line
    G92 E0 ; reset extruder
    G1 Z1.0 F3000 ; move z up little

    M117 Printing.....

    End Gcode:
    G91 ;Relative positioning
    G1 E-2 F2700 ;Retract a bit
    G1 E-2 Z0.2 F2400 ;Retract and raise Z
    G1 X5 Y5 F3000 ;Wipe out
    G1 Z10 ;Raise Z more
    G90 ;Absolute positioning

    Any help would be greatly appreciated

  • You shouldn't need to ABL on every print, just if anything happens that couls cause the leveling mesh to change. If you remove the SD card while the printer is powered on, that might mess with the virtual EEPROM and lose the stored mesh, though. But other than that, at the start of the print a plain G28 to auto-home Z height should be enough.

    My printer came with an A4 sheet from Creality, and I've been using p much exactly the same start Gcode (with slight adjustment to the priming moves) with success.

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