Servo Motor Specifications

Description of Specification Items

Rated Output Power

The range in which the temperature rise does not exceed the permissible value when operating continuously at motor's rated speed and rated torque.

Rated Speed

The speed when the motor operates at the rated output power.

Maximum Speed

The maximum rotation speed at which the motor can rotate.

Maximum Input Speed

The maximum speed that can be input into the gearheads.

Rated Torque

The torque output when the motor operates at the rated output power and rated speed.

Maximum Instantaneous Torque

The maximum torque that can be used instantaneously (for a short period of time).
During acceleration and deceleration, the motor can be used up to the maximum of this torque.

Speed Range

This is the range of the operable rotation speed on the gearhead output shaft.

Rotor Inertia

This refers to the inertia of the rotor inside the motor.
This is necessary when the required torque (acceleration torque) for the motor is calculated.

Inertia

The inertia inside the gearhead.
This is necessary when the required torque (acceleration torque) for the motor is calculated.

Permissible Inertia

The load inertia at which the motor is stable and can be controlled.
If the load exceeds this value, control may become unstable, resulting in problems such as variations in the speed regulation, protective circuit activation, and vibrations.

Gear Ratio

This is the ratio of the rotation speed between the input speed from the motor and the speed of the gearhead output shaft.
For example, a gear ratio of 10 indicates that when the input speed from the motor is 10 r/min, the gearhead output shaft speed is 1 r/min.

Resolution

The angle that the motor rotates for 1 pulse.
For example, if the resolution is 1000 p/rev, it means that 1 motor rotation (360˚) can be divided into 1000 segments.

Backlash

This is the play of the gearhead output shaft when the motor shaft is fixed.
When positioning in bi-direction, the positioning accuracy is affected.

Rated Current

The input current value for the main power supply required when the motor is used in the continuous duty region.

Static Friction Torque

Electromagnetic Brake Specifications. This is the maximum holding torque (holding force) at which the electromagnetic brake can hold the position.

How to Read Rotation Speed-Torque Characteristics

• NX620AA-◇

  

• NX65AA-PS5-◇

  

① Continuous Duty Region

The region where a motor can be operated at the continuous rating. The effective load torque must always be kept in this region.

② Limited Duty Region

The region is used when accelerating and decelerating

③ Rated Torque

The torque output when the motor operates at the rated output power and rated speed.

④ Maximum Instantaneous Torque

The maximum torque that can be used instantaneously (for a short period of time).
During acceleration and deceleration, the motor can be used up to the maximum of this torque.