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Answered Overhang?

Discussion in 'Troubleshooting' started by Jimmy Husain, Feb 25, 2016.

  1. Jimmy Husain

    Jimmy Husain Member

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    I am trying to print this :

    https://www.youmagine.com/designs/low-poly-retro-characters

    I printed the Mario model & below is what I get.

    JIM_2689.jpg JIM_2691.jpg JIM_2690.JPG

    Setup :

    E3Dv6
    0.4 Nozzle
    Printing speed @ 40 mm/s
    PLA @ 208 c
    Bed @ 55 c
    0.4 mm layer
    Dual fans at 50%
    Extrusion Multiplier @ 1.0
    Extrusion Width @ Auto

    Things I've done but still no luck :

    Increasing the speed to 50 mm/s
    Reducing the Extrusion Multiplier down to 0.9
    Extrusion Width to Manual @ 0.48 mm
    Reducing print temperature down to 200 c

    Advice?
     
  2. Quest

    Quest Member

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    your layer is to high. The max is about .3 mm with a .4 mm nozzle.
     
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  3. Jimmy Husain

    Jimmy Husain Member

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    Seriously?

    I did not that with a 0.4 nozzle the max I can go is 0.3 mm layers? I thought after all this while I can print 0.4 mm layers with a 0.4 nozzle.

    EDIT :

    So if I were to print @ 0.4 mm layers then I will need a 0.6 nozzle?
     
  4. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    Yep, the ideal layer heights for a nozzle is about 25-75% of the orifice size, so a 0.4 mm will print from 0.1 to 0.3 fairly easy, Anything over about 75% and you will run into intra-layer adhesion issues. You can experiment with both the upper and lower ends of the range, but as a general guideline you should be safe in the 25-75% range.
     
  5. Jimmy Husain

    Jimmy Husain Member

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    Thanks for the infos guys. I'll try again with 0.2 mm layers later.
     
  6. KTMDirtFace

    KTMDirtFace Well-Known Member

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    Glad I saw this, Simplfy3d always yells at me when I make the layer height .4. Guess I know why now.
     
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    It is a rule of thumb rather than engineering maxim, but like @WheresWaldo I find the best results in that range every time.
    If you really want to print thicker layers (and the visual downside is not huge normally) then consider an upgrade to a volcano adapter and you can do really large layers really quickly. Speeds up the print process a lot and a minimal cost of resolution.

    Even with a volcano you can still drop back to a 0.4mm nozzle if you want or need to.
     
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  8. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    That is why I specifically used the word GUIDELINE rather than rule.

    @Jimmy Husain, if you don't want to change hotends, just know that you can still get nozzles up to around 1.0 mm for the Hexagon/E3D, you just can't print as fast with them as you can a E3D Volcano. Also, if you have an E3D already, you can just buy the upgrade to the Volcano rather than buying a complete hotend.
     
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  9. Jimmy Husain

    Jimmy Husain Member

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    So which will be better? Printing with 0.6 nozzle @ 0.4 mm layers, the V6 or Volcano? I know better can be different to everybody but what do you guys think?

    Speaking of which, I did print with 0.6 nozzle @ 0.4 mm layers. No pretty but yes I am happy.

    JIM_2749.jpg JIM_2750.jpg JIM_2751.jpg JIM_2752.jpg
     

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