The piezo scanner was built by Chip Coldwell (he also wrote the software
that runs on the Quadra that receives, displays and stores the rae data
from the Pentium controller) and should also be documented elsewhere.
For the purposes of the operation of the IR table though, it is enough
to know that we typically want to use its full range (30 microns mechanically)
and therefore the amplitude of the driving triangle waveform should
be set at or near its maximum on about 4.8 volts. You can check that by
looking at the "Main Out" output on an oscilloscope and adjusting the "AMP"
The scanning frequency can also be set (to the appropriate value as explained
above ) by monitoring this same output on the scope, and adjusting
the "FREQ" knob.
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