On 01/20/17 19:14, Gene Heskett wrote: > On Friday 20 January 2017 06:09:09 TJoseph Powderly wrote: > >> I don't mean to muddy the waters but I saw today some hacks to measure >> rpm using audacity to find the audible Hz of spindles. Too cool to >> keep secret. Same trick was used to balance propellers and >> discriminate which prop on an RC heli was causing vibration. I can >> imagine a slow non-rt speed control loop. HTDC ( hope that doesn't >> confuse :-) tomp tjtr33 >> > It doesn't google, tomp. Got a link? http://diyworkplace.com/42-how-to-rpm.html http://hackaday.com/2015/03/07/dirt-cheap-motor-balancing-and-vibration-analysis/ https://www.rcgroups.com/forums/showthread.php?1996241-Balancing-130X-rotors-using-spectral-analysis theres others too tomp tjtr33
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