Re: [CAD_CAM_EDM_DRO] small amp recommendation needed

> > Actually, he wasn't modifying the audio amps at all as the kind of
> > frequencies he wanted to use were within the audible range.
>
> HMMM? Is this a linear motor, like out of a hard drive? Most DC
> brush motors have so much inertia, you don't get any response other
> than audible tones when you go much over 25 Hz.

The motor apprently has quite impressive frequncy response. It's a
little brush servo motor, maybe a tad smaller than nema 23. He's
verified the amplitude of motion at the frequencies of interest with a
mirror and laser pointer, measuring the length of a line projected on
the far wall of the room. While the audio amp lasted, the system was
working for him. In operation, it sounds a lot like a mistuned servo
loop - I keep thinking I've messed something up when he runs it while
I'm working on the motion system in!

Chris

--
Christopher C. Stratton, stratton@...
Instrument Maker, Horn Player & Engineer
22 Adrian Street, Somerville, MA 02143
http://www.mdc.net/~stratton
NEW PHONE NUMBER: (617) 628-1062 home, 253-2606 MIT