On 01/31/2011 10:47 PM, Jon Elson wrote:
> Mark Wendt wrote:
>    
>> Yabut, yer servos can't play Metallica...  ;-)
>>
>>      
> Oh, yes they can!  Not having any idea what the hell I was doing when I
> designed my own servo amps back in 1997, I gave them WAAY too much
> bandwidth.  The torque loop is certainly good to 10 KHz, at least.  I
> hooked up a dynamic signal analyzer (an instrument for making
> frequency/phase response graphs of closed-loop systems) and found the
> servo motors made SURPRISINGLY good speakers.  I don't have a way of
> injecting real audio frequencies from G-code, but if you fed audio into
> the servo amp's input, I guarantee sound would come out.
>
> Jon

Sound maybe, but Metallica?  ;-)

Mark

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