Low cost STM projects – A review

I’ve been reviewing some student/hacker attempts at building low cost STMs. The major challenge in an STM project appears to be the coarse/fine grained approach mechanism, and there are a few options. this review is also pretty useful. Unimorph disc projects These projects use a standard Piezo buzzer cut into 4 quadrants. The tip is …

Piezo actuators – A review

Piezo actuators are extremely interesting for high performance, applications. They often provide 1000s of newtons of force at sub-nanometer resolution. They also respond extremely quickly, though often have a settling time and exhibit hysteresis which makes closed loop operation desirable. I’ve been looking at these actuators for a personal project (generally I’ve been reading about …