1. This is a shaft- reversed stepper motor that is frequently used in CNC machines and 3D printers. 2. The Advantages of step motors are low cost, high reliability, high torque at low speeds and a simple, rugged construction that operates in almost any environment. 3. They are typically digitally controlled as part of an open loop system for use in holding or positioning applications. 4. The Nema 17 is larger and generally heavier than for example a Nema 14, but this also means it has more room to put a higher torque.
