Hi guys. I'm trying to use a piezo-electric actuator in a project of mine to move a sample a very small displacement. I am currently working with a ThorLabs AE0203D08F. I'm trying to detect the displacement of the device at a specified DC Voltage, somewhere around the range of 100V. Currently, I am placing a while above a test stage on top of the actuator. I put the wire as close as optically possible using a telescope and increase the voltage on the actuator until a short is detected between the stage and the wire. Using this method I would be able to see if the device is actually displacing the way it should. Anyway, I have yet to detect any displacement anywhere from 0-140V. I was wondering if maybe I am doing something incorrectly, since I am somewhat new to piezos. The max displacement of the piezo is 9.1 microns at 150V. Does anyone have any ideas as to why I am not detecting an displacement with this device? Thanks for any advice you guys can offer. Also, I did not know what forum this would best fall under, so if a mentor can move this to the best suited forum, it would be much appreciated. Thanks again!