Meredith wrote:

"Perhaps the bigger problem is just the motor and/or gears
to be driven with?  One would likely need a "harder to find" DC
motor with a "high" gear speed reduction ratio attachment to
where it can be somewhat controlled/limited."

Jameco Electronics (www.jameco.com)  has a reversible DC motor that has a
speed of ~2 RPM. It as a 3000 to 1 gear head that is perfect for adjusting
sensors. I use one on my SG sensor so I don't have to lift off the box to
get to the leveling screw. The Jameco part number is 176049 and the cost is
$18.95. I manually adjust my sensor my temporarily connecting up a 9 volt
battery to the motor.

-Larry Cochrane
Redwood City, PSN

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