Product Overview of the HG-MR73B Servo Motor

The HG-MR73B from Mitsubishi is a compact rotary servo motor. Specifically, this HG Series model is designed for efficient motion control. It features a straight shaft for straightforward integration. Moreover, the motor includes an electromagnetic brake for secure holding. Therefore, this servo motor suits applications requiring precise positioning and fast response.

Power and Performance Specifications

The HG-MR73B operates on a 200VAC supply voltage class. Rated current consumption is 5.8 Amps under normal conditions. However, maximum current reaches 20 Amps for peak loads. Rated output power is 0.75 kW (750 watts). Consequently, this motor handles small power capacity applications effectively. The ultra-low inertia design enhances overall responsiveness.

Speed Characteristics and Capabilities

Rated speed for the HG-MR73B is 3000 r/min under standard operation. Maximum speed reaches up to 6000 r/min for demanding tasks. Therefore, this motor adapts to varying operational requirements. For rapid acceleration and deceleration, the ultra-low inertia is beneficial. As a result, cycle times can be reduced in high-speed applications.

Electromagnetic Brake Functionality

The HG-MR73B includes an electromagnetic brake as a standard feature. This brake secures the motor shaft when power is removed. Additionally, it helps stop the motor quickly during emergencies. The brake also holds position against external forces. Hence, this feature is essential for vertical axis applications. For example, use it in lifting or gravity-affected movements.

Environmental Protection and IP Rating

The HG-MR73B carries an IP65 ingress protection rating. Specifically, this means complete dust protection. Furthermore, the motor resists low-pressure water jets from any direction. As a result, it is suitable for demanding industrial environments. However, note that an oil seal is not included with this model. Therefore, avoid applications with direct oil splash on the shaft entry.

Mechanical Specifications and Dimensions

Shaft and Mounting Details:

• Shaft shape: Straight shaft (no keyway specified)

• Inertia class: Ultra-low inertia

• Capacity class: Small power capacity

Weight and Physical Data:

• Product weight: 4.54 kg (10.00 lbs)

• Gross weight with packaging: Approximately 5.20 kg

Environmental Conditions:

• IP rating: IP65 (dust-tight and water-jet resistant)

• Suitable for indoor industrial use

Installation Guide for the HG-MR73B Servo Motor

Follow these steps to install your HG-MR73B correctly:

Step 1: Mount the motor securely to your machine frame. Use all four mounting bolts with proper torque.

Step 2: Connect the straight shaft to your load coupling. Ensure proper alignment to avoid bearing stress.

Step 3: Wire the power cables according to Mitsubishi specifications. Specifically, follow the 200VAC class wiring diagram.

Step 4: Connect the electromagnetic brake leads to a separate power source. Then, verify brake operation before full power-up.

Step 5: Connect the encoder feedback cable to your servo drive. Shield the cable properly for noise immunity.

Step 6: Perform a test run at low speed first. After that, gradually increase to rated speed while monitoring temperature.

Compatible Servo Drives

The HG-MR73B works with Mitsubishi servo drives. Specifically, use MR-J4 or MR-J5 series drives. These drives provide optimal control algorithms for HG series motors. Therefore, they maximize performance and efficiency. For best results, always pair with Mitsubishi recommended components.

Application Scenarios for the HG-MR73B

The HG-MR73B is ideal for various precision applications. For instance, use it in CNC machine tools. Similarly, it works well in robotic arm joints. Packaging machinery also benefits from its fast response. Furthermore, electronic assembly equipment requires such precision. In all these cases, the electromagnetic brake adds safety for vertical axes.

Package Contents

The box includes the following items:

• One HG-MR73B rotary servo motor unit

• One electromagnetic brake (pre-installed on motor)

• One straight shaft with keyway (factory installed)

• One motor power cable connector kit

• One encoder feedback cable connector kit

• One installation manual (multilingual)

Frequently Asked Questions (FAQ)

Question 1: What is the rated output power of the HG-MR73B?

Answer: The HG-MR73B delivers a rated output of 0.75 kW (750 watts). Therefore, it suits small power capacity applications.

Question 2: Does this motor include an electromagnetic brake?

Answer: Yes, the HG-MR73B comes with an electromagnetic brake as standard. Consequently, it can hold position on vertical axes.

Question 3: Is the HG-MR73B suitable for dusty environments?

Answer: Yes, the HG-MR73B has an IP65 rating. Specifically, it is fully dust-tight and resists water jets.

Question 4: What is the maximum speed of this servo motor?

Answer: The HG-MR73B reaches a maximum speed of 6000 r/min. However, rated speed is 3000 r/min for continuous operation.

Question 5: Does this motor include an oil seal on the shaft?

Answer: No, the HG-MR73B does not include an oil seal. For this reason, avoid applications with direct oil splash.