Hall IC sensor type

This type utilizes a Hall effect sensor, a semiconductor device that detects magnetic field changes. It determines position by sensing magnetic variations as the motor's rotor poles pass the Hall IC. Although its resolution is lower than that of encoders or resolvers, it is relatively inexpensive, making it an advantageous choice for applications that do not require detecting minute position deviations.

Encoder type

Equipped with an optical or magnetic rotary encoder, this type can detect position and speed, including rotational speed, direction, and angle.

Optical encoders utilize a code wheel with slits attached to the motor shaft. They operate by emitting LED light and detecting the encoder's status via light reflection. The code wheel generates optical pulses, which are converted into electrical signals to provide rotational position data. A key advantage is their high resistance to surrounding magnetic fields.

Magnetic encoders detect changes in magnetic fields to determine the rotation angle. Although they require consideration of the ambient magnetic environment, they offer a cost advantage compared to optical types.

Optical encoder (Reflective type)

Magnetic encoder

Battery-less absolute encoder type

Featuring a high resolution of 4,000 cpr, this type enables highly accurate position detection. Applying the principle of an analog clock, it retains the current position without a backup power supply even when the encoder power is turned off. Furthermore, because operation can resume without homing after an emergency stop, it eliminates the need for origin and limit sensors while contributing to shorter cycle times.

Resolver type

This type features an extremely high resolution of 200,000 P/R. Its simple structure makes it highly resistant to heat, dust, shock, and vibration, ensuring highly stable and precise motor operation even in harsh environments.