Thermal Paste Solved Jamming Issues

Discussion in 'E3D-v6 and Lite6' started by Jamezracer, Mar 17, 2015.

  1. Jamezracer

    Jamezracer New Member

    Joined:
    Mar 17, 2015
    Messages:
    1
    Likes Received:
    1
    While the canola oil trick serves to treat the symptoms of jamming, I sought to treat the cause. The purpose of the heat break is to prevent plastic from melting too high up in the tube. If it melts too high up then it expands to fit the width of the tube under pressure and sticks. Thus, the fundamental issue is cooling.

    Solution: apply a generous amount of thermal paste to the heat break threads where it interfaces with the heatsink.

    I've gone from 50% failure rate to 0% failure rate over the past few days of printing with this trick. I've also noticed that the nozzle oozes significantly less which means no more stringy parts. Parts now come out with gorgeous surface finishes with no blemishes or skipped layers.

    A quick test that demonstrates the cooling improvement is to let the unit sit hot for 10 minutes, then push the filament in manually to see how high up from the nozzle the plastic start melting. Before the thermal paste, I could push the filament in about 10mm and lots of molten plastic would gush out of the nozzle. Since this trick, I can only push the filament in a couple of mm and hardly any molten plastic oozes out at all. This means less time spent cleaning the nozzle, and less stringy parts.

    Let me know if it works for you too!
     
    Miasmictruth likes this.
  2. Maxxon

    Maxxon New Member

    Joined:
    Mar 31, 2015
    Messages:
    1
    Likes Received:
    0
    Hi,

    i had the same idea a few days ago and it seems to have solved the issue for me too. :cool:
     
  3. sungod3k

    sungod3k Active Member

    Joined:
    Aug 25, 2014
    Messages:
    26
    Likes Received:
    1
    The paste is only in the thread of the heatsink/ break? How does that help?

    Im not having issues just interested to reduce oozing.
     
  4. elmoret

    elmoret Administrator

    Joined:
    Mar 1, 2014
    Messages:
    586
    Likes Received:
    91
    It helps by creating a better path for heat to get to the heatsink, therefore lowering the heatbreak temperature.

    Ooze is best reduced by reducing heater temperature.
     
  5. McSlappy

    McSlappy Member

    Joined:
    Mar 20, 2014
    Messages:
    2
    Likes Received:
    0
    Now that's a brilliant idea!
     
  6. loiphin

    loiphin Member

    Joined:
    Sep 14, 2015
    Messages:
    5
    Likes Received:
    1
    Mike Kelly likes this.
  7. e3duser

    e3duser Active Member

    Joined:
    Aug 20, 2015
    Messages:
    36
    Likes Received:
    0
    My E3Dlite6 does not seem to have this occuring, so that 's good.
     
  8. elmoret

    elmoret Administrator

    Joined:
    Mar 1, 2014
    Messages:
    586
    Likes Received:
    91
    Lite6 is fully PTFE lined, which limits the temperature but makes cooling less important (which is why the heatsink is stainless).
     
  9. Dave Parry

    Dave Parry Member

    Joined:
    Feb 9, 2016
    Messages:
    6
    Likes Received:
    0
    Is this normal PC type paste used for cpu's etc?
     
  10. Mike Kelly

    Mike Kelly Volunteer

    Joined:
    Mar 7, 2014
    Messages:
    444
    Likes Received:
    89
    Yeah as long as it's not a thermal epoxy, any thermal paste will work more or less the same. You're just trying to minimize any air gaps and increase thermal transfer
     

Share This Page