Someone will probably prove me wrong but this might be tough to do. Anything modern will use embedded servodata to determine RPM. It's a closed-loop system. You'd have to know the servodata arrangement and respond as the controller. I don't know, there might be logic available for this purpose but it doesn't seem trivial given the variety of drives.
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There are a vast number of people who are uninformed and heavily propagandized, but fundamentally decent. The propaganda that inundates them is effective when unchallenged, but much of it goes only skin deep. If they can be brought to raise questions and apply their decent instincts and basic intelligence, many people quickly escape the confines of the doctrinal system and are willing to do something to help others who are really suffering and oppressed." -Manufacturing Consent: Noam Chomsky and the Media, p. 195
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