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Thank you Li, I identified the problem. It was SPM feedback. It should be set to linear not log. Now it works perfect. Best regards Mops
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Dear Li, I checked the bias between the sample and the piezo guard, they are the same as the one set in the software, whenever the software bias is changed the other changes accordingly. I made sure the tip is more than 1mm above the sample, it took long to approach but it crashed. There is no error message on the screen during engage, it is the usual
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Thanks, It is a good one. Best Mops
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Thank you Stefan
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Dear Vennie, That is normal, I guess all AFMs do the same, mine is like that.
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Dear all, I tried to do STM on HOPG with our new Dimension Icon AFM with scanasyst but the tip keeps crashing all the time during engagement. I tried the scan parameters set in the manual but the tip still crashes. The bias voltage was increased from 100mV to 500mV, the gains increased to ( integral : 1, proportional :2) and the current set point decreased