Thanks for the insight! Makes perfect sense and explains why some of my cheap fans have failed and ones still working that was set horizontal.Edit: Balls mean any orientation. Nobody tends to tell us that sleeve bearings are good until about 15 degree's from horizontal. They can't look down at 30 degrees, as we often ask of them. The bearing surface, is no longer bearing all the weight. Death is then months away, at best.
Unfortunately I got a broken one, but for about £100 we can get these with EC motors. Perhaps this is one of them? It's got a lot info on the front. Buttons for the bat headphones, communism, lights out warning, win8 homescreen, and some sort of penetration I wouldn't want to press. Then a longer row of brightness, contrast, and I presume the mitsubishi button is for rave level performance.I got tired of the clip on ones stuffing up and needing multiple fans in a 4ft² tent so i purched This one its a Dimplex fan it can rotate 360°+ and tilt to 90° and it has a random " natural simulation" setting aswell as multiple speeds. It sits on the floor in the middle of the tent and blows everywhere in the tent .
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Yes it does have that function, it seems well built .Your fan might do the wave thing?