How to Install the NexBot Robotics AC111-009 Servo Motor

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Tools Required

• Lockout/Tagout (LOTO) kit
• Torque wrench (metric)
• Metric socket set
• Metric hex key set
• Digital multimeter
• Mechanical lift or support for robot arm

Article

This guide provides instructions for installing the NexBot Robotics AC111-009 Ac Servo Motor (SKU: NXB-SRV-AC111-009). This procedure is intended for qualified maintenance technicians responsible for servicing NexBot Robotics equipment, including the R-50, R-100, and C-10 series robots. The AC111-009 is a 9 Nm AC servo motor used for the J1, J2, and J3 axes, providing precise motion control.

Proper installation is critical for robot performance, reliability, and safety. Failure to follow these instructions may result in equipment damage or personal injury.

Prerequisites

Before beginning the installation, ensure you have met the following requirements.

Safety Precautions:

• All work must be performed by a certified technician.
• The robot system must be completely powered down and de-energized.
• Follow all site-specific Lockout/Tagout (LOTO) procedures before starting any work. The main electrical disconnect for the robot controller must be locked and tagged.
• The robot arm must be mechanically secured or resting in a safe, stable position to prevent unexpected movement when the motor brake is disengaged or the motor is removed.

Required Components:

• 1x NexBot Robotics AC111-009 Ac Servo Motor (NXB-SRV-AC-111-009)
• Motor mounting bolts and washers (refer to the specific robot's service manual for size and grade)
• Replacement gaskets or seals for the motor housing, if applicable.

Required Tools:

• A complete Lockout/Tagout (LOTO) kit
• Torque wrench with metric sockets
• Metric hex key set
• Digital Multimeter (DMM)
• Mechanical support or hoist to secure the robot arm

Step-by-Step Instructions

Follow these steps carefully to remove the old motor (if applicable) and install the new one.

Step 1: De-energize and Secure the Robot

1. Move the robot to a designated maintenance position where the arm is supported.
2. Power down the robot controller following the standard shutdown procedure.
3. Apply LOTO to the main power source for the robot controller. Verify that all system power, including the 24VDC control voltage, is off using a DMM.

Step 2: Access the Target Joint Motor

1. Identify the axis requiring motor replacement (J1, J2, or J3).
2. Carefully remove any protective covers or access panels on the joint housing to expose the motor.
3. Keep all removed fasteners organized for reassembly.

Step 3: Disconnect the Old Motor

1. Before disconnecting, label all cables connected to the motor (Power, Encoder, Brake, Communication).
2. Carefully disconnect the power cable connector from the motor.
3. Disconnect the encoder feedback cable.
4. Disconnect the communication cable (EtherCAT or PROFINET).
5. If the motor has an integrated brake, disconnect the brake release cable.

Step 4: Remove the Old Motor

1. Ensure the weight of the motor is supported before removing the mounting bolts.
2. Loosen and remove the mounting bolts that secure the motor to the gearbox flange.
3. Carefully slide the motor straight out from the gearbox assembly. Be mindful of the motor shaft and any alignment keys or splines.
4. Inspect the gearbox mounting surface and input shaft for any signs of damage or contamination. Clean the surface as needed.

Step 5: Prepare and Mount the New NXB-SRV-AC111-009 Motor

1. Unbox the new NXB-SRV-AC111-009 servo motor and inspect it for any shipping damage. Verify the part number is correct.
2. If a key is used, ensure it is properly seated in the motor shaft's keyway.
3. Carefully align the new motor's shaft with the gearbox input coupling.
4. Gently slide the motor into place, ensuring the mounting flange sits flush against the gearbox housing. Do not force the motor into position.
5. Insert the new mounting bolts and hand-tighten them in a star pattern.
6. Using a calibrated torque wrench, tighten the bolts to the specification listed in the robot's primary service manual. Overtightening can damage the motor or gearbox housing.

Step 6: Reconnect Cables

1. Connect the power, encoder, communication (EtherCAT/PROFINET), and brake cables to the corresponding connectors on the new motor.
2. Ensure each connector is fully seated and secured. A light tug should confirm a positive lock.
3. Route the cables neatly and secure them according to the original configuration to prevent pinching or chafing during robot operation.

Step 7: Reassemble and Finalize

1. Reinstall any access panels or covers removed in Step 2.
2. Ensure all tools and foreign objects are removed from the work area.

Verification

After installation, perform these steps to verify functionality.

1. Power On: Remove the LOTO device according to your site's procedures and power on the robot controller.
2. Check for Faults: Observe the teach pendant for any motor-related error codes. Resolve any active faults before proceeding.
3. Mastering/Calibration: The robot axis will likely need to be re-mastered or calibrated. Follow the procedure outlined in your robot's software manual.
4. Jog the Axis: Set the robot's speed to a very low value (e.g., 5-10%). Carefully jog the affected axis in both positive and negative directions. Listen for any unusual noises and watch for smooth, controlled motion.
5. Test Program: Execute a simple, low-speed motion program to confirm the motor operates correctly under programmed control. Monitor motor temperature and current draw from the controller diagnostics screen if possible.

Once verification is complete, the robot can be returned to service.

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