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Cura Ignoring Z-Offset after Auto Level Robo R1+

Discussion in 'General Questions' started by aznhlfan, Jun 28, 2017.

  1. aznhlfan

    aznhlfan Active Member

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    I downloaded Cura 15.04, followed Mike Kelly's set-up instructions, but after running th 9 point auto level the printer ignores my M565 Z setting in the start up code. It prints way to close, not allowing extrusion, and grinding into the bed. Any ideas on why this is happening?

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  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Paste in exactly what you are using for the startup block.
     
  3. aznhlfan

    aznhlfan Active Member

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    ;Basic settings;: Layer height: {layer_height} Walls: {wall_thickness} Fill: {fill_density}
    ;Print time: {print_time}
    ;Filament used: {filament_amount}m {filament_weight}g
    ;Filament cost: {filament_cost}
    ;M190 S{print_bed_temperature} ;Uncomment to add your own bed temperature line
    ;M109 S{print_temperature} ;Uncomment to add your own temperature line
    G21 ;metric values
    G90 ;absolute positioning
    M82 ;set extruder to absolute mode
    M107 ;start with the fan off
    G28 ;Home all
    M565 Z-.55;define Zoffset at -.55
    G29 ;Run auto-level
    G1 Z15.0 F{travel_speed} ;move the platform down 15mm
    G92 E0 ;zero the extruded length
    G1 F200 E3 ;extrude 3mm of feed stock
    G92 E0 ;zero the extruded length again
    G1 F{travel_speed}
    ;Put printing message on LCD screen
    M117 Printing...
     
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Which version of Marlin are you running?
     
  5. aznhlfan

    aznhlfan Active Member

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    I never changed it from the factory, so I think 1.0
     
  6. Ryan TeGantvoort

    Ryan TeGantvoort Active Member

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    So I take it you have increased (more negative) that number to try and move it farther from the bed?
     
  7. aznhlfan

    aznhlfan Active Member

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    I have tried 3 different z off set numbers in Cura. I havean lcd screen, so i see no matter what number i enter, after the auto lwvel, the printer defaults to .30 and it wont change.

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  8. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Most LCDs will display the relative offset. Not the absolute and the M565 is applied to the autoleveling plane* and is not an absolute offset either...





    *it is all math that happens during the print..
     
  9. aznhlfan

    aznhlfan Active Member

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    Ok, so keep changing the M565 number? I have gone from -.3, then -.55, then -.9 then back to -.55. no change.

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  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    It will only affect the print, not the LCD display. Just to be clear here.
    Also these :

    G28 ;Home all
    M565 Z-0.55;define Zoffset at -.55
    G29 ;Run auto-level


    Should really be the first three things in the block.

    Marlin is not real "bright" so you must use upper case letters and the leading "0" for the offset is probably needed too.
     
  11. aznhlfan

    aznhlfan Active Member

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    Ok, i will change those

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  12. aznhlfan

    aznhlfan Active Member

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    So if I took out the G29 ;Run Auto Level line out, would it then not run the 9 point auto level and use the Z offset i entered in the M565 line?

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  13. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Nope. G29 is what actually does the autoleveling and uses the offset provided by the M565

    You really can't change those first three. The autolevel will not run if the machine is not homed first and the M565 needs to happen before the G29...
     
  14. aznhlfan

    aznhlfan Active Member

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    I switched the 3 lines to be at the top of the start code block, we will see if that helps.

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  15. aznhlfan

    aznhlfan Active Member

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    It did not help, same problem

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  16. Geof

    Geof Volunteer Moderator
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    Copy and Paste what you have in there now please so we can all have eye ballls on it after the change
     
  17. aznhlfan

    aznhlfan Active Member

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    The only changes i made were the G28, M565 and G29 code moved to the top, the first 3 lines of the code. I also added a "0" and changed the z offset to -0.9, instead of just -.9 like you had said. I got it to print, but still under extrudes. If i go higher on the z offset (like -1.1), do i still need the "-" if i go over 1.0?

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  18. Geof

    Geof Volunteer Moderator
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    you shouldnt have " " in the script. The " " was for example of what you should have in there. Is it printing to close to the bed ? (wagon wheel ruts in the first layer?)

    Code should look like this yes? :

    G28 ; home
    M565 Z-.9 ; set the offset
    G29 ; autolevel
     
  19. aznhlfan

    aznhlfan Active Member

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    Thats what i have, the " "were just for explaining, not in the code. Not sure if its printing to close, looks good, the bottom is nice and glossy. But it skips layers and the layers look like they arent todether as 1 print, you can see and feel every layer.

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  20. aznhlfan

    aznhlfan Active Member

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    And its not only the first layer like that, all the way up to the top of the piece.

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