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Hey Amir, I am having the same kind of problems, can I ask how you determined whether the deflection sensitivity was too high/low and how you got a good calibration for this in the end? Cheers, Mark
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I do have two figures for the force curves on the PS, which also illustrate the invariance of the deformation to my peakforce setpoint (top figure is PFSP = 200nN, bottom PFSP = 1uN)
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Hey Peter, Thanks for your reply. The only force curves I can find right now are in the ramp mode (trig threshold .2V). As you can see there is no hysteresis there, however the adhesion is quite high! (especially for the second one). Like I said before, it is possible for me to drastically reduce the deformation by manually adjusting the DDS3 amplitude
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correction, I mean deformation instead of indentation. I have not looked at force separation curves.
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Hello all, Recently, when I am trying to go through the calibration steps for pfqnm I am getting a rather high (2-3nm) indentation on the sapphire sample when calibrating the DDS3 amplitude (RTESP tip). As the sapphire should not deform at all I am not sure what possible causes are I've managed to get the deformation down to +-500pm by manually
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Apparently this is a calibration issue for the sync distances or DDS3 amplitude. If you find yourself with the same problem I suggest this training video from bruker https://vimeo.com/user15273673/review/119890124/ec51c428e4. The relevant part for this issue starts at min 43:30. Mark
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Hello all, My questions regards DMT modulus channel in the QNM PF mode. In the DMT channel we get a lot of streaky lines, where the DMT modulus appears to be constant over a long range of subsequent datapoints (see link to figure below). Considering how the value of the DMT modulus is extracted from the heartbeat signal (as I understand it) it seems