What are the differences between rotary motors and automatic motors?

rotary motors and ordinary motors

Ordinary motors (such as common electric motors) are primarily responsible for making things "rotate." Like the blades of an electric fan, the inner drum of a washing machine, and the conveyor belts in a factory. What it likes most is to spin in one direction continuously and can continue to spin for a long time. They strive for speed, endurance, and stable, continuous power output.

Features: Their motion pattern is relatively simple and pure, focusing solely on "rotation." However, their advantage lies in their ability to rotate very quickly and for very long periods of time.

Swing motors (also called oscillating motors)

They drive equipment to oscillate back and forth or precisely position within a set angle range.

They do not rotate continuously, but instead perform a reciprocating motion within a preset angle (such as 180 degrees, 270 degrees, etc.), rotating left, returning to the center, and then right.

Features: Their core function is precise control of angle and position, and they typically deliver very high torque. 

Core Differences

Example: Excavator

The swing motor is what drives the entire upper body of an excavator (cab and boom) left and right. It requires tremendous force to propel the heavy upper body and precisely stop it at any position to keep the bucket aligned.

The motor that drives the excavator's tracks is the conventional motor (travel motor). It continuously rotates the tracks to move the excavator forward and backward.