I'd be interested to throw together a voltage to frequency converter
to test the AFM's response. Listening to a variable audio tone is a
great way to test that sort intermittent thing. Probably wouldn't take
too long.

On 8/12/10, David Beierl <dbeierl@attglobal.net> wrote:
> At 10:07 AM 8/12/2010 Thursday, Mike \"Rocket J Squirrel\" wrote:
>>I wonder how many seconds that process would take -- from "Hey, the
>>wiper has lost contact with the track so I'm shutting off the
>>injectors!" to "Oops, I see contact again and will start firing the
>>injectors!"
>
> Pathetic fallacy aside, it would be "Hey, no air going through the
> motor but it's still turning, must have taken a sudden turn into deep
> space, it's liberty hall, you can spit on the mat and call the cat a
> well never mind."
>
> How many seconds did it take your tach to drop say 25 rpm?
>
> Thee chittereth from the wrong tree, O squirrel.  Order of magnitude
> difference.
>
> Yours,
> David
>