What type of motors can be used for robots? laser engraver stepper motor

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What type of motors can be used for robots? laser engraver stepper motor

That would depend a lot on the robot you are making. But if you are looking for a basic round up on different motors, there it goes :
1. Permanent magnet DC motor : Most basic of the motors. Gives good speed and torque. Available in different speed rates, generally RPM. Used for basic locomotion and movement of parts. Easy to use, but mostly for generic purposes.
2. Brushless DC motor : Very high speeds, 1000s of RPM. Used in drones, hovercrafts. Very fragile, easy to blow them up. Need good motor drivers to control. They are fun to work with. I like the noise they make.
3. Servo motor : A servomotor provides a precise control of angular position, velocity and acceleration. It used for controlled motion, like turning a robots arm or legs to a certain degree, holding a position. Easy to use, needs a motor driver in most cases, unless you are using an utterly small one. They don't have a lot of torque so, not much useful if you are planning for some heavy lifting.
4. Stepper motor : They are similar to servos, in some ways but are a lot different they mechanism. They move in some fixed angular steps, 0.9 degrees, 1.8 degrees etc. They can be used with simple motor driver at their standard step angles but also can be made to rotate in smaller fractional step sizes using special drivers. They have plenty of torques, as compared to servos. Also they can rotate in complete circles unlike servos. Servos can rotate in maximum of 180 or something as per their specifications but never a full circle.
5.Induction motors : These are heavy duty AC industrial motors, not much used in robotics. Though you may find some small induction motors here and there. They are very rugged, have high torque. Need starters and speed controllers.

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