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  1. #1
    Engineer-in-Training ServiceXp's Avatar
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    Question Woah, What a difference... Is there something else going on here?

    Over the last few weeks I've been reading about how adding a cooling fan to the FFCP could improve ABS printing results. I was skeptical, but thought It's not a difficult modification so 'Why Not'. I printed a calibration step cube before and after the mod...

    It looks like they are printing in 2 different resolutions?

    Left is after mod, right before mod.

    20151125_061802.jpg

  2. #2
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    It may look better but both are overextruded. It's possible also that you are melting at too high of temp, that's why the right one is so glossy. I say overextruded since even the cooled one has many rounded corners where they should be sharp. I've never printed that piece, but I am pretty sure all the corners are sharp and square.

  3. #3
    Engineer-in-Training ServiceXp's Avatar
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    Using S3D, what are some ways to fix the over-extruding? The cube is printed in Hatchbox ABS@ 230c with a bed (glass) temp of 115c. all other settings are default.

  4. #4
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    Set the correct average filament diameter. Then adjust extrusion multiplier. .92 is a good multiplier to start with. 115c for the bed temp is way hot for ABS. Use 90-95c. Use ABS slurry on glass, apply slurry when glass reaches 90c+.

  5. #5
    Engineer-in-Training ServiceXp's Avatar
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    Will adjust and test, thanks

  6. #6
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    Print at 100% infill also. What size is the model you printed? The base model is pretty small. Did you enlarge it any?

  7. #7
    Engineer-in-Training ServiceXp's Avatar
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    I didn't make any modification to the model, as I believe it design is specific to calibration. Once I have the next print complete I'll try and understand what to do with it..

  8. #8
    Engineer-in-Training ServiceXp's Avatar
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  9. #9
    There's No need for the Extra fan at nozzles !
    Just Lower the nozzle-temp instead !
    I've noticed that Many people run nozzle-temp way Too high.
    and the extra fan really gets in the way when working on or cleaning extruders.

    The X & Y stepper-motors probably Do need a fan though.
    Last edited by EagleSeven; 11-25-2015 at 10:46 AM.

  10. #10
    Jfkansas is spot-on the money. Calibrate your extruders and use the correct temps.


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