Fan causing HotEnd to not reach tempreature

Discussion in 'E3D-v6 and Lite6' started by traveltrousers, Jun 1, 2014.

  1. traveltrousers

    traveltrousers New Member

    May 25, 2014
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    I wired the fan up directly to 12v as suggested by a E3d V5 user on the reprap board but is this correct?

    I was printing quite happily at 240 degrees but now when I use M109 S250 it goes up and can't hold the temperature.

    Should I have run PID with the fan on?
  2. elmoret

    elmoret Administrator

    Mar 1, 2014
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    Re: The fan....

    Yes, the PID should be run with the fan on. The fan being on changes the thermodynamic properties of the hot end. It's a bit like making a key to fit a lock, changing the lock, and wondering why the key doesn't work anymore.
  3. Josh

    Josh Administrator
    Staff Member

    Feb 26, 2014
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    Re: The fan....

    Sorry, I know this post is a few days old - we have been very busy at E3D-HQ.. :)

    The fan should not affect the HotSide to the point that it cannot reach temperature, if this is happening you may not have a large enough gap between the HotSide and the HeatSink. Make sure that the top of the Heater Block is aligned with where the thread starts on the shorter threaded section of the HeatBreak and that the Block & Sink are well separated.

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