Hemera 24V fan really loud

Discussion in 'HotEnds & Extruders' started by Ravi K, Dec 9, 2019.

  1. Ravi K

    Ravi K Member

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    The fan for cooling the heatsink is really loud, it is pushing a lot of air.

    Is this expected?

    Thanks
    -Ravi
     
  2. Greg Holloway

    Greg Holloway Administrator
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    Check you have the correct voltages.
     
  3. Greg Holloway

    Greg Holloway Administrator
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    one can also PWM down the fan if needs be.
     
  4. Daniel Seah

    Daniel Seah Member

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    I’m really new to 3D printer stuffs, 3D printer fans are using 12v or 24v, but in computer spec, they are different. Ppl are taking about 45,000RPM and 72,000 RPM. So what is the actual RPM we need for nozzle cooling fan?
     
  5. Daniel Rock

    Daniel Rock Well-Known Member
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    You don't want to be cooling your nozzle directly, but I'm assuming here you are referring to the part cooling fan, that's a difficult question to answer as different filaments respond differently to different levels of part cooling fans. https://e3d-online.com/dc-fans at the moment we only carry 12v blower fans. But this style is what is typically used.
     
  6. Danny Baughan

    Danny Baughan Member

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    So if the stock Hemera fan can be "pwm'd" down would that suggest there is a degree over spec to prevent heat creep?
    I have seem people use the stock fan on the Sidewinder forum and that doesn't clear as much air as the one included in the Hemera kit. As I was trying to eliminate both the horrendous noise AND heat creep (Only suspected due to frequent jams) with the Hemera edition I went over spec and bolted on a Noctua 40x40x20. It's marginally quieter but didn't resolve the TPU jams.
    I now however suspect the ducting is the source of noise and not the fan as the Noctua (and E3D original) is significantly quieter off the printer than on. This is to be expected but a Noctua on my Prusa really helped with noise. Not so much on the Hemera.
     

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