To drive the coils, he used a pair of TB6612FNG stepper motor drivers, controlled by a Wemos D1 Mini. The housing was 3D printed mostly from PLA, but with a few bits done in PETG. This was for ...

[Giovanni] took apart an economical mini servo and after replacing the motor with a 100:1 gear motor and using it to power a compact 3D printed linear actuator, he used the servo’s potentiometer ...

The unique PiezoWalk linear motor is non-magnetic and self clamping and provides sub-nanometer resolution. It can be integrated in actuators and linear translation stages as shown in the example above ...