I didn't notice this at first (I think it just started happening recently) but now when I turn the zortrax on, I get the noise shown in this video. It is pretty loud, and I believe it is coming from under the tray where all the electronics are housed. Bad fan possibly? Or, I could just be extra sensitive and this is a normal sound.
https://www.youtube.com/watch?v=eJsqI791W2c&feature=youtu.be
That is one of the fans.. Probably the top fan. I replaced mine with a ball bearing fan.. I'm guessing it gets quiet after about a minute..
Definitely one fan, just replace.
Scythe or Noctua are great replacements, and much quieter.
That's what I figured! Anyone know the size off the top of their head? I will replace with a noctua, thats what I have in my PC
40mm x10mm
Here is what I replaced mine with.. http://forum.zortrax.com/index.php?/topic/449-dual-fan-experiment/?hl=fans