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Solved Nozzle too close to bed on first layer

Discussion in 'Troubleshooting' started by bryson bishop, Jun 24, 2016.

  1. bryson bishop

    bryson bishop Member

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    Im sure that someone has already had this problem on the forum before, but I've been looking for the past several hours and haven't found anything that helps. Could someone please send me in the right direction.

    The first layer seems to be too close to the bed. so close that it will not allow the filament to feed. It goes through the bed leveling process and everything before it starts printing as well. if i manually twist the z-axis screws while the first layer is being put down, although this has caused me some problems with havung an unlevel print, it seems to help it. Any help will be much appreciated! Thanks.
     
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Increase the Z offset.

    example startup GCode:

    G28 ; home all axes
    G1 Z5 F5000 ; lift Z by 5mm
    M565 Z-1.0 ; set the offset for auto-leveling mechanism
    G29 ; run auto-level



    So change -1.0 to something bigger (like -1.1) and experiment with values to find one that leaves your firstlayer lookinglike this:

    https://printedsolid.com/blogs/news/tagged/first-layer
     
  3. bryson bishop

    bryson bishop Member

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    G28 X0 Y0 ;home X & Y
    G28 Z0 ;home Z
    G1 Z5 F5000 ;lift nozzle 5mm
    M565 Z1.0 ;use 1.0 Z-offset
    G29 ;run autolevel

    Should i put the - in there as well?
    and also should i change

    G28 X0 Y0 ;home X & Y
    G28 Z0 ;home Z

    to

    G28 ; home all axes
     
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    negative numbers are further from the bed, positive numbers are closer to the bed. There is your problem.

    It should start at-1, not+1
     
  5. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Mind you, I doubt even -1.0 is perfect. PLay with it until you get a first layer like the linked page.

    One of mine is about -0.6 and the other -.8 or -.9 (I forget).
     
  6. bryson bishop

    bryson bishop Member

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    Works great now! Thanks! i will continue to play with it until it looks like what you linked.
     
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  7. bryson bishop

    bryson bishop Member

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  8. Geof

    Geof Volunteer Moderator
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    Is it skipping those open spaces or just not extruding off and on ?
     
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  9. bryson bishop

    bryson bishop Member

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    Extruding on and off and ive left the print going and its continuing to do it throughout the print
     
  10. Geof

    Geof Volunteer Moderator
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    Are you sure its not a broken model ? Have you successfully printed it before ?
     
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  11. bryson bishop

    bryson bishop Member

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    Heres the files. i have them both printing on the platform. not really sure on how to see if it is broken or not
     

    Attached Files:

  12. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Run it through a repair service/tool.
    Netfab, Microsoft Azure.

    I ran boite_raspberry.stl
    through Azure for you.

    Reattached the repaired one.
     

    Attached Files:

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  13. Geof

    Geof Volunteer Moderator
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    I always run models through the free version of natfabb on my pc just to be sure :)
     
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  14. bryson bishop

    bryson bishop Member

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    Okay, yeah it turned out good this time. Thanks for the info guys!
     
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