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Answered Bottom Layer squish

Discussion in 'Troubleshooting' started by Lance Jimenez, Mar 14, 2018.

  1. Lance Jimenez

    Lance Jimenez New Member

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    Hey guys I was wondering if anybody knows how to stop bottom layer squish that happens to increase adhesion.My printer is the robo 3d plus and I use matter control. I'm attempting to print some small gears for a project I'm working on but the bottom layer is getting squished causing the teeth of the gears to get closed up on the bottom. I have been trying to reduce the bottom layer height little by little to see if any improvements could be had and there have been some. I was wondering if there was a better way to achieve what I'm trying to do.
     
    #1 Lance Jimenez, Mar 14, 2018
  2. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    You need to increase the Z offset adjusting M565 in your startup code
     
    #2 WheresWaldo, Mar 14, 2018
    Geof and izumi5188 like this.
  3. Lance Jimenez

    Lance Jimenez New Member

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    How do I go about doing so kind of newbie
     
    #3 Lance Jimenez, Mar 14, 2018
  4. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    We need more info, What slicer, and what is the start up G-code in that slicer?
     
    #4 WheresWaldo, Mar 14, 2018
  5. Lance Jimenez

    Lance Jimenez New Member

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    Matter Slice;

    G28 X0 Y0 Z0 ; home all axes
    G1 Z5 F5000 ; lift nozzle
    M109 S[temperature] ; set the extruder temp and wait
    G28 X0 Y0 Z0 ; Home Z again in case there was filament on nozzle
    G29 ; probe the bed
     
    #5 Lance Jimenez, Mar 14, 2018
  6. Geof

    Geof Volunteer Moderator
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    I think in Matter Control (at least years ago when I used it last) you used the "macro" buttons to set the offset but I believe it had to be done for every print. You will want to read up on matter control to know for sure as things do change I have not used it since...maybe 2014?
     
    #6 Geof, Mar 15, 2018
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Normally (as in slicers not MatterControl) you would use the M565 in the slicer startup block:

    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

    Where -1 is the default and more negative to get it higher from the bed (i.1. -1.1) and less negative (i.e. -0.9) to get it closer.
    Experiment and tune until perfect.

    Not saying this will not work in MC, I am saying I do not know :)
     
    #7 mark tomlinson, Mar 20, 2018
  8. Lance Jimenez

    Lance Jimenez New Member

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    So should I just add the M565 Z after the G29 so it will look like this:

    G28 X0 Y0 Z0 ; home all axes
    G1 Z5 F5000 ; lift nozzle
    M109 S[temperature] ; set the extruder temp and wait
    G28 X0 Y0 Z0 ; Home Z again in case there was filament on nozzle
    G29 ; probe the bed
    M565 Z-1.0
     
    #8 Lance Jimenez, Mar 20, 2018
  9. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    It must be:
    1) after the last G28
    and
    2) Before the G29
     
    #9 mark tomlinson, Mar 20, 2018
  10. Lance Jimenez

    Lance Jimenez New Member

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    alright thanks for all the help everyone I will just have to play with it a little see what I get
     
    #10 Lance Jimenez, Mar 20, 2018
  11. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    #11 mark tomlinson, Mar 20, 2018

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