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Solved Autolevel Z offset

Discussion in 'Troubleshooting' started by nol b, Apr 28, 2020.

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  1. nol b

    nol b Member

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    My z offset doesn't seem to be working. I switched over to Cura (in an attempt to troubleshoot some other stuff). I am guessing that something in the G code is resetting it. Does any of this look like it would reset the specified offset?

    ;Generated with Cura_SteamEngine 15.01
    ; Default start code
    G28 ; Home extruder
    G29 Z12.5; Auto Level (Z1.9 was old offset)
    G1 Z5 F100
    M107 ; Turn off fan
    G90 ; Absolute positioning
    M82 ; Extruder in absolute mode
    ; Activate all used extruder
    G92 E0 ; Reset extruder position
    ; Wait for all used extruders to reach temperature
    ;Layer count: 170
    ;LAYER:0
    M107
    G0 F9000 X86.173 Y103.380 Z0.300
     
    #1 nol b, Apr 28, 2020
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    WHich printer and which firmware?
     
    #2 mark tomlinson, Apr 28, 2020
  3. nol b

    nol b Member

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    R1 from 2014ish I think. I have lead screw upgrade and E3Dv6. Also I've replaced the RAMPS with whatever the newest version is and I have a separate board to drive the bed heater.

    I can't find the firmware file but it was around the time that auto level was added.
     
    #3 nol b, Apr 28, 2020
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    So try this:

    G28 ; Home extruder
    M565 Z-12.5;
    G29 ;
    G1 Z5 F100
    M107 ; Turn off fan
    G90 ; Absolute positioning
    M82 ; Extruder in absolute mode
    ; Activate all used extruder
    G92 E0 ; Reset extruder position
    ; Wait for all used extruders to reach temperature
    ;Layer count: 170
    ;LAYER:0
    M107
    G0 F9000 X86.173 Y103.380 Z0.300


    The R1/R1+ used Marlin 1.0.x and you needed to use the M565 for the autolevelinng Z offset (and it should be a negative number).

    If that does not work start with a -1.0 and tweak up/down from there. The number you provided (12.5) seems rather extreme so perhaps you want to just start with -1.0 and go from there. More negative => further from bed and less negative => closer to bed. I have not seen an R1/R1+ need that large of an offset before. Usually 1-2mm max.
     
    #4 mark tomlinson, Apr 28, 2020
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  5. nol b

    nol b Member

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    The 12.5 was just to see if it was actually working or not. I'll try what you posted and let you know. Thank you for the help!
     
    #5 nol b, Apr 28, 2020
  6. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Ah, well keep it negative to avoid driving the nozzle into the bed :)
     
    #6 mark tomlinson, Apr 28, 2020
  7. nol b

    nol b Member

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    M565 worked! Thank you!
     
    #7 nol b, Apr 28, 2020
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