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Solved Print is stringy on first layer - please help! :-)

Discussion in 'Troubleshooting' started by Michele Beyer, Mar 28, 2017.

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  1. Michele Beyer

    Michele Beyer Member

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    Hey everybody!

    So, I'm finally back to having some fun with my printer and am having issues with my print. I have attempted to print this thing 10 times, maybe 11 now? But no success, just really close :)

    I'm printing PLA and the settings are in the attached in photos as well as the issue. I can't get past this first layer as the filament just keeps stringing along and eventually pulls up.

    I'm using Repetier-Host V1.6.2, have the Robo 3D R1Plus Printer

    Thank you for any help!!
     

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  2. Michele Beyer

    Michele Beyer Member

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    Images of my current settings........
     

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  3. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Lower the Z offset and perhaps the extrusion temperature a bit.

    I don't see the M565 in the startup GCode either so you are getting whatever the "default" is.
    Try starting with -1.0 and adjust from there (more negative-> further from bed, less negative -> closer to bed)

    M565 Z-1.0

    After the G28; and before the G29;

    EDIT: Oh, your G29 is missing the semi-colon too:

    G29; is correct.
     
  4. Michele Beyer

    Michele Beyer Member

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    So my G-code should read:

    G28 ; home all axes
    M565 Z-1.0 ;
    G29 ;
    G1 Z50 F5000 ; lift nozzle

    ?? :)

    Also - I attached the current settings for that - when I entered when I entered anything but -0.01 (it was around 11 this morning, so I can't remember all the settings I tried, but for sure 0.8, 1.0, 1.2, 0, 0.1, -0.1, -0.01) the extruder was about half an inch above the bed - was weird.
     

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  5. Michele Beyer

    Michele Beyer Member

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    And when I lowered to extrusion temperature to 185 it didn't print well either :-/ but I can play around with the z-offset and temperatures a bit and see what happens! I assume that since I can change the z-offset in the software, I don't need to add M565 to my G-Code?
     
  6. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    The Z offset MUST BE NEGATIVE if you want the nozzle to be ABOVE THE BED. :)
    The example I gave you was -1.0

    Start there... like I said MORE negative -> further from bed, LESS negative -> closer to bed.
     
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Start there and test it. You will eventually want to fine tune it. One of mine is -0.9 the other -0.6 -->yours will be specific to your machines
     
  8. Michele Beyer

    Michele Beyer Member

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    Ok, thank you so much. Also - you're saying I should add the z-offset to my g-code and not adjust it in the software? I attached an image on one of my responses to you showing where I can change it......
     
  9. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Stringy is usually too hot which is why I suggested adjusting it. BUT... don't make more than one change at a time. Get the Z offset right then see what you have.
     
  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    I have no idea what the software you are using does with that number :) BUT I will bet it does NOT add the M565 command into the output. It probably just adds that number as a global offset to the Z values and doesnit do anything with it as far as autoleveling is concerned. YOU NEED the M565 for autoleveling to happen correctly.
     
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  11. Michele Beyer

    Michele Beyer Member

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    Ok, gotcha! I will test this out!
     
  12. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Again, I do not know what software you are using or what it does with that number. My guess would be that it just applies that as a global offset across the entire bed and it is NOT used for the autoleveling code. Make it zero. Let the autoleveling handle it.
     
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  13. Michele Beyer

    Michele Beyer Member

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    This print is MUCH better! I think I may back off and try -0.9 as the first layer is looking a little flat, but otherwise, it's going great!
     

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  14. Michele Beyer

    Michele Beyer Member

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    Oh, and I'm using Repetier :)
     
  15. Michele Beyer

    Michele Beyer Member

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    Thank you for you help Mark!!
     
  16. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    That's fine software, better than MatterControl. I haven't used it in a coon's age, but it used to be really nice.

    Glad you got it sorted!
     
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