How to Install the NXB-SRV-AC111-005 AC Servo Motor

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Tools Required

• Calibrated torque wrench
• Metric hex key set
• Digital multimeter
• Lockout/Tagout kit
• ESD wrist strap
• Robot-specific mechanical bracing tools

Article

This article provides detailed instructions for the proper installation of the NXB-SRV-AC111-005 AC Servo Motor. This high-performance component is designed for use in the wrist axes (J4, J5, J6) of various NexBot Robotics systems, providing 5.0 Nm of continuous torque for precise motion control. Following these steps carefully is critical for ensuring personnel safety and optimal robot performance.

WARNING: Installation must be performed by a qualified technician. Failure to follow safety procedures, including Lockout/Tagout (LOTO), can result in severe injury or death, as well as damage to the equipment.

Prerequisites

Before beginning the installation, ensure you have the following tools, parts, and documentation available.

• Safety Equipment:
• Personal Protective Equipment (PPE) as required by your facility (e.g., safety glasses, steel-toed boots).
• Appropriate Lockout/Tagout (LOTO) devices.
• ESD wrist strap to prevent damage to sensitive electronics.

• Tools & Equipment:
• Calibrated torque wrench with appropriate sockets.
• Metric hex key set.
• Digital multimeter.
• Mechanical bracing or supports for the robot arm.
• Wire strippers and crimpers (if new connectors are required).

• Parts:
• One (1) NXB-SRV-AC111-005 AC Servo Motor.
• New mounting bolts and washers (recommended, check service manual for specifications).
• Replacement gaskets or seals if required for maintaining the IP65 rating.

• Documentation:
• The service manual for the specific robot model you are working on.

Step-by-Step Instructions

1. Prepare the Robot for Service

1. Move the robot to its designated maintenance position.
2. Power down the robot controller and perform the full Lockout/Tagout procedure at the main electrical disconnect.
3. Verify the absence of voltage using a digital multimeter.
4. Securely brace the robot arm to prevent any uncontrolled movement when the motor brake is disengaged or the motor is removed. This is especially critical for vertically oriented axes.

2. Access the Motor

1. Identify the target axis (J4, J5, or J6) where the motor will be installed.
2. Carefully remove any protective covers or access panels to expose the motor and its connections. Keep track of all fasteners for reassembly.

3. Disconnect and Remove the Old Motor (If Replacing)

1. Carefully disconnect the motor's power, brake, and encoder/PROFINET cables. Note the orientation and routing of each cable.
2. Loosen the motor mounting bolts in an alternating (star) pattern.
3. Support the weight of the motor and remove the bolts completely.
4. Gently slide the motor out from its mounting flange, being careful not to damage the motor shaft or the connected gearbox/coupling.

4. Install the New NXB-SRV-AC111-005 Motor

1. Unbox the new NXB-SRV-AC111-005 motor and inspect it for any signs of shipping damage. Confirm the part number is correct.
2. Clean the robot's mounting flange and the motor flange to ensure a flush, secure fit. Inspect the shaft coupling for wear or damage.
3. Carefully align the new motor's shaft with the gearbox input coupling and slide the motor into position. Do not force the motor; if it does not seat easily, re-check the alignment.
4. Insert the mounting bolts and hand-tighten them to secure the motor.
5. Using a calibrated torque wrench, tighten the mounting bolts in a star pattern to the value specified in your robot's service manual. This ensures even pressure and maintains the integrity of the joint.
6. Connect the power, brake, and PROFINET/encoder cables to the corresponding connectors on the NXB-SRV-AC-111-005. Ensure each connector is fully seated and locked.
7. Secure the cabling according to the original routing, ensuring no cables are pinched or strained.

5. Reassemble

1. Reinstall any access panels or protective covers that were removed.
2. Ensure all tools and hardware have been removed from the work area.

Verification

1. Power On: With all personnel clear of the robot's work envelope, remove the LOTO devices and power on the robot controller.
2. Check for Errors: Monitor the teach pendant for any startup errors. Resolve any communication or drive faults related to the new motor before proceeding.
3. Perform Mastering/Commutation: The new motor will require mastering or commutation to synchronize its position with the robot controller. Follow the specific procedure outlined in your robot's software and programming manual.
4. Test Motion: In a low-speed manual mode (T1), carefully jog the affected axis. Listen for any unusual noises and watch for any jerky or uncontrolled motion. Verify that the axis moves smoothly in both directions.
5. Run Test Cycle: Once manual motion is confirmed to be correct, run a slow-speed production cycle to verify the motor performs correctly under normal operating conditions. Return the robot to service once all checks are passed.

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