Calibration help needed

Discussion in 'Calibration, Help, and Troubleshooting' started by Daniel dom, Sep 26, 2017.

  1. Daniel dom

    Daniel dom Member

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    I have a bigbox dual
    printed with PLA 195°C
    I did the 10 cm correction, but seems like too much extrusion ?
    the underground is ok, but the top is not smooth

    Printed this https://www.thingiverse.com/thing:277394
    Bigbox 1.1 rc6

    Anyone can help me make it more smooth ?


    IMG_20170926_140753.jpg IMG_20170926_140753-2.jpg IMG_20170926_140807.jpg IMG_20170926_141057.jpg IMG_20170926_141008.jpg IMG_20170926_140945.jpg
     
  2. Ephemeris

    Ephemeris Well-Known Member

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    Nozzle diameter?
    Layer height?
    Possibly most important, infill percentage? Looks like 100%
     
  3. Daniel dom

    Daniel dom Member

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    Nozzle is 0.4 layer hight is 0.25 infill 50 %

    It is a new big box, just the fourth print. So standard settings
    Just put the new firmware.
     
  4. Ephemeris

    Ephemeris Well-Known Member

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    There may be several things going on here. I'd start with the simplest likely thing which is probable over-extrusion.

    I like to do that 10 cm E-steps calibration a few times because, sometimes for no obvious reason, I have gotten a bad value.

    Did you measure your filament? Nominal 1.75 mm filament can be off by many percent. It's worth checking and comparing it to what the slicer thinks it is.

    Also in your slicer check for something like "extrusion multiplier". Usually it's set to something like 0.9. It's a fudge factor used to correct how much plastic is extruded. It can be used to correct for many things but mostly it's to correct for "die-swell". Die-swell is a sort of weird thing where the volume of plastic coming out of the hot-end is actually larger than the volume of plastic going in. If you look it up it's somewhat interesting.
     
  5. A Dragon In A Pie Costume

    A Dragon In A Pie Costume Well-Known Member

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    From my experience you have the following issues:
    Lose belts
    Not calibrated esteps
    Dusty filament
    Overheating
    If you hear pops while printing your filament is also moist
    I also recommend greasing your bearings
    And if you dont mind please go to Marlinfw.org and update your firmware
     
    #5 A Dragon In A Pie Costume, Sep 27, 2017
    Last edited: Sep 27, 2017

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