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Sure, you can enter Spring Constant and Tip Radius into the "Cantilever Parameters" parameter list and deflection sensitivity into the Calibrate>Detector dialog (look under the Calibrate menu). Alternatively, you can uncheck the "Ignore Probe Parameters" box in the experiment selector when you switch from one experiment to another
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please send it to me at first name dot last name at bruker dash nano dot com. Thanks, Bede
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Ok, that is definitely a bug. I will report it and hope we can get a fix for the next release! --Bede
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Hi Chiara, It looks as if the export is putting out the correct numbers (at least for the file you sent). As you noted, the export is using exponential notation, but if you pay attention to the units in the header line it appears to be correct (i.e. 4e+003 pN = 4 nN): Input1_V_Ex Input1_V_Rt Defl_nm_Ex Defl_nm_Rt Defl_pN_Ex Defl_pN_Rt 3.030396E+00
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Hi Ranna, Yes, it is possible that the tip could be contaminated and that the contamination is dominating the measurement. There are several methods for cleaning the probe. Most involve indenting a soft material such as gold or rubber with a high force. --Bede
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Can we get a copy of the original, raw Nanoscope file where this problem occurs? Thanks!, --Bede
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The front panel outputs are updated at 100KHz, but the inputs (1 and 2) are read at 500,000 samples/second with the usual 200KHz antialiasing second order lowpass filter. --Bede
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To get the load-displacement curve, you need to take the usual AFM force curve and compensate for the cantilever bending. We call this a force-separation plot. Separation is the negative of deformation up to a constant. You can find a display mode in the force curve view that allows you to look at the curves this way. If you want to make it look like
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That sounds like a bug. Can you send me one of your raw Nanoscope files? My email is first name.last name at bruker dash nano dot com. It sounds as if the problem happens when you do the exports by right clicking on files in the browser, but it does not happen when you do the export by right-clicking on the plot. Is that right? --Bede
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Hi Fei, The 500KHz HSDC uses an ADC that samples at 500,000 samples/second. There is a hardware antialiasing filter on that ADC at 200KHz. On top of that, some data types have additional low pass filters or lower filters (X, Y sensors for example). The 6.25MHz HSDC uses an ADC that samples at 50,000,000,000 samples/second. There is no antialiasing filter