Ch. 7. iDrive Imaging Sec. 7.3. Older Models
2.
Activate the tune sweep
• In the AR SPM Software, select the tune
tab of the master panel.
• Under Manual Tune, set the parameters
as shown to the right. Note the phase
offset is not important and sweep time
of 1s is fine too.
• Uncheck the iDrive control, or the piezo
will not receive any drive signal.
• Hit the ‘Continuous’ (tune) button.
3.
Adjust the piezo compression
Tools 0.028” hex driver or Allen wrench
• Listen for a small chirping sound
coming from the droplet holder.
• Gently tighten the preload setscrew until
the chirping sound becomes abruptly
louder. This is the point where the set
screw has compressed the piezo into the
back of the window assembly. Once this
happens the preload is set.
4.
Finishing up
• Back to the software, under Manual
Tune hit the ‘One Tune’ button to stop
the chirping.
• Done. Remove the cantilever holder and
store it or put in a cantilever and start
imaging.
You may ask why the acoustic AC mode piezo is necessary when the iDrive system is available as
an AC drive for the cantilever. Practically speaking it’s quite useful to switch back and forth between
acoustically driving the cantilever and using iDrive. Even if you don’t see the need, the next person
using the cantilever holder might, so it’s a good idea to perform the final piezo pre-load steps above.
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