Nozzle on brand new E3D v6 unscrews during each print

Discussion in 'E3D-v6 and Lite6' started by Ray Vin, Jun 17, 2017.

  1. Ray Vin

    Ray Vin Member

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    I didn't have this problem with the original hot end but my new E3d v6 hot end has a nozzle that seems to have a mind of it's own. It literally unscrews itself during each print destroying the printed object. I tighten it down but I'm afriad to over crank the wrench and break the nozzle. I thought about using something like Loctite but I think that would make it difficult to switch out nozzle tips. What should be used on nozzles?
     
    #1 Ray Vin, Jun 17, 2017
    Last edited: Jun 17, 2017
  2. Old_Tafr

    Old_Tafr Well-Known Member

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    Step 21.3 on this page..

    https://wiki.e3d-online.com/wiki/Bi...:_Step_By_Step_Assembly_Process#Where_next.3F

    refers to...

    https://wiki.e3d-online.com/wiki/E3D-v6_Assembly#HotSide

    The assembly of the hotend, is a dim and distant memory but the last time I assembled one but I remember having to tighten things in a specific order (bold type is from the assembly page).

    "Gripping the Heater Block with a spanner, tighten the Nozzle with a second spanner. Do not over-tighten, we are going to tighten it up later when the heater block is hot."

    Did you follow this procedure, i.e. the initial assembly "do not over-tighten" and then tightening again when hot?

    I cannot imagine it coming apart after tightening when hot. Although without torque figures and with most people not having a small torque wrench does make the interpretation of "tight" open to interpretation.
     
  3. Ray Vin

    Ray Vin Member

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    Yes, pretty much screwed it in for the first time with my fingers. Heated the hot end to 100c and then tighten it up. But still it loosened and last night I followed the procedure again but I put more force to it. Today I was able to get two successfully printer jobs completed. I might have been over cautious as the reason I replaced this hot end is because I over exerted the last and sheared the nozzle off. It seems is though it's fixed at the moment.
     
  4. Old_Tafr

    Old_Tafr Well-Known Member

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    It's all down to "feel" on how much you tighten, but I would suspect that if the pressure you exert on a spanner isn't more than a few inches from the part being tightened that you can't apply too much pressure. I think 100c may be a little low, what do the instructions suggest?
     
  5. Dan Halsall

    Dan Halsall Member
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    Hi we suggest that you Hot Tighten at 285ºC so 100ºC is far too low and would account for the nozzle unscrewing.
     

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