Bevel on E3D hotend

Discussion in 'E3D-v6 and Lite6' started by Arkaedra, Sep 21, 2014.

  1. Arkaedra

    Arkaedra Member

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    Hello,

    Last week I built my second 3D printer which has two E3D V6 0.4mm hotends. I'm having a problem with the hotend, only proved with ABS. The filament is getting stuck on the nozzle continuously.

    I disassembled the hotend and found that the internal bevels between the nozzle and the heat break makes a small flange on the filament, I think this is causing the filament to stop the extrusion. I'll try to illustrate this on the following pictures:





    If the filament becomes cooler in this joint, and this is the main purpose of the heat break, the filament gets stuck in both directions.

    I wonder if a flat end on this design of hotend could improve the performance avoiding this issue.

    Any comments?

    Regards,

    JoaquĆ­n.
     

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  2. Enlightx

    Enlightx Member

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    i have a similar problem. i belive it were the ptfe tubing meets the hotend inside the heatbreak.

    take a look at my post.

    iv given up now no answer for over a week on forums and via email.
     
  3. Arkaedra

    Arkaedra Member

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    Hi Enlightx!

    Thanks for your answer. I was watching your post and yes it's very similar to mine but my hotend is the 3mm direct version so it has no ptfe tubing... I also come from J-Head and moved to E3D to get higher temps, Unfortunately I'm not sure if this will work.

    I hope someone can help us because this way the hotend is useless.
     
  4. Sanjay

    Sanjay Administrator
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    The bevels are a bit of a red-herring, at that point the plastic is molten and the bottom of the heatbreak sits at near as dammit the temp of the block and nozzle. Everything at that point is a liquid and should be flowing.

    If you can let me know a bit more detail about your machine and setup by filling in the following form:
    https://docs.google.com/a/e3d-online.co ... =send_form

    I'd be in a much better position to help. 3mm and ABS in a v6 should be about as pain free as it gets and if you're experiencing problems I'm sure they can be easily resolved. If you post a few images of your setup that would probably be really helpful as well.

    Really nice images and impressions of the hotend/filament by the way!

    Enlightx,

    I offered to take back your parts for analysis and replace them in full to get to the bottom of your issue:
    viewtopic.php?f=13&t=236&p=1548#p1548
    Hopefully we can get you sorted.
     

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