KA840TXX

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The KA840TXX servo motor by Sanyo Denki offers 0.4 kW rated output and 2500 min⁻¹ rated speed. Its 1.7 N·m continuous stall torque ensures stable mid-range motion control in industrial systems.

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Product Description:

Sanyo Denki is specialized in producing precision motion control systems and industrial equipment. Their SANMOTION servo motors are widely used in automation systems. The KA840TXX servo motors offers reliable performance for mid-range motion control needs and supports compact designs and energy efficiency across various applications.

The KA840TXX servo motors features a flange size of 88 mm and delivers a rated output of 0.4 kW. It operates at a rated armature voltage of 85 V and achieves a rated speed of 2500 min⁻¹. The maximum speed reaches up to 4000 min⁻¹ which enables dynamic response in high-speed systems. The continuous stall torque is 1.7 N·m which supports steady-state torque demands. It can handle up to 12 N·m of stall torque for peak loads. Rotor inertia is measured at 5 × 10⁻⁴ kg·m² which ensures balanced performance in high-acceleration applications. The KA840TXX servo motors includes a built-in tachometer generator which enables accurate speed feedback and enhanced position control. The tachometer rotor inertia is 0.12 × 10⁻⁴ kg·m² to minimize load on the motor shaft. The motor comes with an output shaft equipped with a key and offers mechanical security during torque transmission. Electrical connections are made through lead wires which allow flexible integration with control systems.

The KA840TXX servo motors complies with an IP43 protection rating to guard it against solid particles over 1 mm and water spray at limited angles. It is designed for ambient temperatures ranging from 0°C to 40°C to make it suitable for typical industrial environments. The unit is compact yet efficient with a mass of 3.85 kg. This motor is ideal for machine tools, packaging systems and industrial robotics where moderate torque, compact size and speed control precision are essential.

Ambient temperature
0~40℃
Connection
Lead wire
Continuous stall torque[N∙m]
1.7
Maximum speed[min-1]
4000
Motor flange size[mm]
88
Output shaft
With key
Peak stall torque [N·m]
12
Protection rating
IP43
Rated armature voltage[V]
85
Rated output[kW]
0.4
Rated speed[min-1]
2500
Rotor inertia [×10-4kg·m2]
5
Servo motor mass[kg]
3.85
Tachometer generator
Yes
Tachometer generator - Rotor inertia[×10-4kg∙m2]
0.12

Frequently Asked Questions about KA840TXX:

Q: Can the KA840TXX servo motor be mounted in any orientation?

A: Yes, it is designed for flexible installation. However, adequate airflow and thermal considerations must be maintained based on the system setup.

Q: What applications benefit most from the 12 N·m peak stall torque in the KA840TXX?

A: Applications involving short, high-load bursts—like indexing tables or robotic arms—gain improved performance from its high peak torque. It enhances the system’s load tolerance temporarily without motor damage.

Q: Why is a built-in tachometer generator important in the KA840TXX servo motor?

A: It provides real-time speed feedback, improving the accuracy of closed-loop control. This enhances stability and performance in precision-driven environments.

Q: What is the benefit of using lead wire connections in the KA840TXX servo motor?

A: Lead wires simplify electrical integration and offer flexible routing options. This allows the motor to be adapted easily in compact or customized enclosures.

Q: Is the KA840TXX servo motor compatible with third-party motion controllers?

A: Yes, the KA840TXX offers standard voltage and feedback interfaces. Its lead-wire connectivity also allows integration with a wide range of industrial control platforms.


Internal Product Review

  • ‘‘The KA840TXX servo motor from Sanyo Denki is an ideal solution for compact automation systems. Its 85 V rated armature voltage, 4000 min⁻¹ max speed and 5 × 10⁻⁴ kg·m² rotor inertia enable dynamic yet balanced operation. The keyed output shaft ensures mechanical stability under load.’’

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