Force mode script question

Marius posted on Mon, Feb 18 2013 11:57 AM

rated by 0 users

Hi, we were recently using scripts for ramp mode of QNM. The ramp channel z scan works fine by changing the piezo position. However the ramp channel Setpoint does not seem to control the deflection of the cantilever. See the attached image. So when we start the script tip deflects 10 V instead the 2 V which is set up as delta. We tried different values of delta and other parameters, but the deflection always increases up to 10 V. Our initial deflection is less than 0.02V. What could be wrong with the measurements?

Thank you.