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Unresolved Weird first layers and outer lines

Discussion in 'Troubleshooting' started by Darkest, Jan 27, 2016.

  1. Darkest

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    I fix the stick to bed problem using blue tame but now this is what is happening. The start of the print come out all weird and after that the rest of the print is almost all good in some cases but the lower part get messed up. How can i solve this. I notice the first lines the printer do come out like shaking but the printer does not shake or anything.
     

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  2. Mike Kelly

    Mike Kelly Volunteer

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    mark tomlinson likes this.
  3. Darkest

    Darkest Member

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  4. Mike Kelly

    Mike Kelly Volunteer

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    Did you watch the getting started video?
     
  5. Darkest

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    Yes.At beginning was working all good but now with the new filament i get this error. Does the filament has something to do? It is not a Robo filament. So i just click the offset setting i want and is applied? Nothing tells me it is.
     
  6. Mike Kelly

    Mike Kelly Volunteer

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    I don't use matter control so I'm not sure.

    Filament shouldn't have anything to do with it. The Robo3d autoleveling method isn't the best and can be inconsistent.

    Your printer is successfully touching down at all 9 points during the startup script? What are the G29 response codes
     
  7. Darkest

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    It is now better but not there yet. I lower the layer height to 0.1. It does all the printing nice except the first layers and the last. See pics.
    Yes it is touching all 9 points.
    ->G29

    <-Bed x: 15.00 y: 20.00 z: -1.01
    <-Bed x: 110.00 y: 20.00 z: -0.27
    <-Bed x: 205.00 y: 20.00 z: 0.25
    <-Bed x: 205.00 y: 125.00 z: 0.30
    <-Bed x: 110.00 y: 125.00 z: -0.41
    <-Bed x: 15.00 y: 125.00 z: -1.32
    <-Bed x: 15.00 y: 230.00 z: -0.99
    <-Bed x: 110.00 y: 230.00 z: -0.05
    <-Bed x: 205.00 y: 230.00 z: 0.84
    <-Eqn coefficients: a: 0.01 b: 0.00 d: -1.37
    <-planeNormal x: -0.01 y: -0.00 z: 1.00
    <-ok
     

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  8. Mike Kelly

    Mike Kelly Volunteer

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    For the top increase the number of top fill layers.

    Can you snap a picture of the first layer as it's being printed?
     
  9. Darkest

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    Here. The first layer does not come bad now that i saw it well is the layers after that and then is good again.
    Also: Normal print sticks to bed but support lines does not.
     

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  10. Mike Kelly

    Mike Kelly Volunteer

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    Yeah still too high. Reduce the offset some more and make sure you don't have two somewhere. If you need help adjusting the offset in MC I suggest robo3d phone line, or MatterHackers forum as I don't use MC
     
  11. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    From the pictures you have a lot of other stuff going on. Pic 1, seriously under-extruding, the extrusion should be overlapping on each line it places down. Pic 4, harder to see because it's black filament, But it looks like a combination of under-extrusion and too low a tem, so you are seeing some delamination in the intra-layer bonding.

    Support can be tricky since it can extrude at a lower rate than the normal perimeter/infill, usually less, so it just doesn't squeeze the plastic down as well for the first layer.

    Also agree with @Mike Kelly, Z offset is too high.

    Take a look at the pictures in this blog post by Matt from @Printed Solid, http://printedsolid.com/blogs/news/37035715-get-your-prints-to-stick-check-your-skirt, it shows what the first layer extrusion should look like.
     
  12. Darkest

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    Ok i see some improvement lowering the offset. Default was 0.8 Pic 1, i set to 0.5 Pic 2-3 and 0.4 Pic 4-5. I see that 0.5 and 0.4 filament around is not round but kinda flat is that ok? On 0.5 abd 0.4 the print came out perfect. Also in 0.4 i cannot see the lines on the bottom of the print because kinda merge together.
     

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  13. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    IMG_0112.JPG is exactly how a first layer should look.
     
  14. Darkest

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    The 0.4?


    Sent from my iPhone using Tapatalk
     
  15. Mike Kelly

    Mike Kelly Volunteer

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    Looks to me like a .45 would be just about perfect
     
  16. Darkest

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    Ok my friend i got is working on 0.45 like you said thanks. Now my last problem is that the top part is doing this (Pic 1) every time. This are my settings (Pic 2) with the offset to 0.45.
     

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  17. WheresWaldo

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    Two things, first, that is a bridging issue, it is trying to span from solid infill line to the next, second it should smooth out with more top layers. At 15% infill you have to span a lot. increasing the number of top layers to at the very least 10 (since you have layer height set to 0.1 mm). You could also use more infill percentage, maybe 20-25% will help mitigate this .
     
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