Stepper motors are the most precise type of motor we will look at because of their ability to move in accurate steps. They can be found in everything from blue-ray player lens rigs to nd printers to industrial robot arms. They have multiple coils you need to excite, which is more complicated to control but is pragmatically equivalent to multiple DC motors.

PROS

• $$ - you pay for the accuracy but the consumerization of printers has brought the price down significantly
• Can rotate to very accurate positions, sometime called "microsteps."
• Lots of great controllers on the market but almost always needs an MCU
• Comes in standard sizes defined by NEMA

CONS

• Can be $$$ - high-precision, high-torque models can be uber-expensive, especially as they add sensors and gearing
• Heavy-ish; don't plan on using these in light drones
• More power-hungry than an equivalent DC motor