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  1. #1

    Print head clogs at the same point every time...?

    Hi,
    OK, total newbie here.
    Although in the past I've designed stuff for 3D printing, up until now I've always sent the files away to a company to actually produce the prints.
    But I've now taken the plunge and bought a Creality Ender 3 Pro to have a go at doing prints myself.

    My issue is I've just been trying to print a simple frog I found online.
    But it seems the head is clogging at the exact same point every time this file prints, resulting in a blob on the poor amphibian's neck and a messy slot of missing plastic around his throat.

    I've checked the motion of all the rollers and moving parts in all planes and they all seem smooth.

    Can anyone shed any light as to what might be causing this?
    Thanks in advance.
    Attached Images Attached Images
    Last edited by Legolas; 04-03-2022 at 07:29 AM.

  2. #2
    Staff Engineer Roberts_Clif's Avatar
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    If your problem occurs at the same location every time then you may have problems with your Z-Axis sticking.
    Last edited by Roberts_Clif; 04-03-2022 at 07:11 PM.

  3. #3
    I've printed other models that are as tall or taller than this one, and they all print fine at all heights. Could there be something in the actual file (either the original stl or the gcode sliced) that's upsetting it? Or doesn't it work like that?

  4. #4
    Staff Engineer Roberts_Clif's Avatar
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    OK I see.

    Post STL along with your sliced G-Code, will take a look too see what is going on.

  5. #5
    Files attached.
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  6. #6
    Staff Engineer Roberts_Clif's Avatar
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    Inspected your G-Code Frog.gcode to find in the code what could cause your problem.
    I printed Your G-code without any modifications other that what I call draft mode (full Speed) below is the results.

    Frog.jpg

    You can see under the frogs chin that there should be build plate supports.
    An other rings in the texture and obliviously I printed it way too fast.
    Last edited by Roberts_Clif; 04-03-2022 at 07:35 PM.

  7. #7
    Thanks for taking the time to investigate Roberts_Clif - very much appreciated.So could it be those build plate supports causing the issue? Is this a thing with large over-hanging designs (if you see what I mean)? As I say this is all new to me.Other than that yours looks fine to me. Evidently I still have much to learn.

  8. #8
    Super Moderator curious aardvark's Avatar
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    no - you NEED supports under the chin.

    The angle is just too steep to print without supports.
    :-)

    sometimes using a thinner layer setting can help with this kind of thing, As the thinner the layer the more layers you can use to build out along the angle - in this case the throat.

    Better cooling is also useful.

    Looking at it, it would only needa a couple supports under the chin.

  9. #9
    Ahh, OK. Yes, that makes sense. Will watch out for stuff like that in future prints. Thanks again for the advice. Very much appreciated.

  10. #10
    Super Moderator curious aardvark's Avatar
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    An other rings in the texture
    It's a tree frog - supposed to have rings ;-)

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