SKU: NXB-SRV-MD132-008 | Version: 1.0 | Brand: NexBot Robotics
The NexBot Safety MD132-008 is a compact, high-power multi-axis servo drive engineered to control multiple axes of motion with exceptional precision and synchronization in demanding industrial robotics applications. This drive simplifies machine architecture by consolidating the control for up to three separate servo motors into a single, space-saving unit, reducing cabinet clutter, wiring complexity, and potential points of failure. Key features include a total power output of 8kW, making it suitable for driving the primary joints of medium to large payload robots. The drive operates on a 480VAC three-phase supply, aligning with standard industrial power systems. This is critical for applications like coordinated welding, complex path-following, and high-speed pick-and-place operations where axis coordination is paramount. The MD132-008 incorporates integrated safety functions, including Safe Torque Off (STO), to help system integrators achieve required safety performance levels without additional external components. The robust design features an anodized aluminum housing for effective thermal management, ensuring reliable operation under continuous-duty cycles. Installation is streamlined with DIN rail mounting and front-facing, accessible connectors for power and communication, simplifying both initial setup and subsequent maintenance tasks. This servo drive is an excellent choice for upgrading or maintaining robotic systems that require a combination of high power density, advanced motion control, and integrated safety.
Download and install the latest version of the NexBot DriveSuite commissioning software from the official NexBot Robotics support portal. This software is required for parameter configuration, tuning, and diagnostics. Ensure your PC meets the minimum system requirements listed on the download page.
Connect your engineering PC to the EtherCAT network and ensure the master controller is powered and configured. The MD132-008 drive will be automatically detected by the master when the network is scanned. You will need to import the ESI (EtherCAT Slave Information) file for the MD132-008 into your master's configuration software.
Using DriveSuite, connect to the drive and load the correct motor parameter file for the servo motors you are using. It is critical to configure motor data, encoder resolution, and current limits before attempting to enable the drive. An incorrect configuration can lead to poor performance or damage to the motor or drive.
The MD132-008 features an auto-tuning function to optimize control loop gains for the connected motor and load. This process will move the motor axis slightly to measure its inertia and mechanical properties. Ensure the axis is free to move and that the movement will not cause a collision before initiating the auto-tune sequence.
Motion commands are sent from the master controller (e.g., a PLC or motion controller) over the EtherCAT network using standard CiA 402 drive profiles. The drive supports various modes including Cyclic Synchronous Position (CSP), Cyclic Synchronous Velocity (CSV), and Profile Torque (PT). Select the mode appropriate for your application in the master controller's configuration.
The front panel of the MD132-008 has status LEDs for power, EtherCAT communication, and error conditions for each axis. A solid green run LED indicates normal operation, while a flashing red error LED indicates a fault. Refer to the troubleshooting section for a detailed list of fault codes and their meanings.
The STO function provides a safety-rated method for removing torque from the motor without disconnecting main power. When the STO input is de-energized, the drive's power stage is disabled, preventing the motor from generating torque. This function must be tested regularly as part of the machine's overall safety validation.
When a fault occurs, the drive will disable its output and report a specific fault code. Use the DriveSuite software to view the fault history and diagnose the root cause. Most faults can be reset via a software command or by cycling the 24VDC control power after the underlying issue has been resolved.
| Interval | Task | Notes |
|---|---|---|
| Weekly | Visually inspect the drive for any signs of overheating, damage, or loose connections. Check that the cooling fans are operating and not obstructed. | Address any abnormalities immediately to prevent equipment failure. |
| Monthly | Clean the cooling fan filters and heatsink fins using compressed air. Ensure airflow pathways are clear of dust and debris. | A clogged heatsink is a primary cause of over-temperature faults. |
| Quarterly | Verify the tightness of all power and motor terminal connections using a calibrated torque screwdriver. | Vibration can cause terminals to loosen over time, leading to high resistance and overheating. |
| Annually | Perform a functional test of the Safe Torque Off (STO) circuit by activating the machine's emergency stop system. | This test verifies the integrity of the safety system and should be documented in a maintenance log. |
| Annually | Backup the drive's parameter file using the DriveSuite software. | Having a current backup allows for rapid recovery in the event of a drive failure and replacement. |
| Every 5 Years | Replace the internal cooling fans. Fans are mechanical components with a finite lifespan. | Contact NexBot Robotics for the correct replacement fan kit. |
| Symptom | Possible Cause | Solution |
|---|---|---|
| Drive will not power on (no LEDs) | Missing 24VDC control power, missing 3-phase main power, or blown internal fuse. | Verify 24VDC control power is present at the control terminals. Check main 480VAC power and upstream breakers. If both are present, contact NexBot support. |
| EtherCAT communication error | Incorrect wiring, faulty cable, incorrect network configuration, or drive is in a fault state. | Check EtherCAT cables for damage and ensure they are securely connected. Verify the EtherCAT master configuration matches the physical network. Reset drive faults. |
| Overcurrent Fault | Motor cable short circuit, incorrect motor parameters, excessive mechanical load, or abrupt acceleration. | Inspect motor cables and connectors. Verify motor parameters in software match the motor nameplate. Check for mechanical binding. Reduce acceleration/deceleration rates. |
| Overvoltage Fault | High incoming line voltage, or excessive regenerated energy from a high-inertia load during deceleration. | Measure incoming AC voltage to ensure it is within the drive's operating range. If caused by regeneration, install an appropriately sized external braking resistor. |
| Overtemperature Fault | Blocked ventilation, cooling fan failure, high ambient temperature, or excessive continuous load. | Ensure proper clearance around the drive. Clean heatsink and fan filters. Verify fan operation. Check if the ambient temperature in the cabinet exceeds specifications. |
| Motor is noisy or vibrates excessively | Poorly tuned control loops, mechanical resonance, or incorrect motor phasing. | Perform the auto-tuning procedure. If resonance is suspected, use the notch filter function in DriveSuite. Verify motor wiring (U, V, W) is correct. |
| Following Error Fault | The actual motor position deviates too far from the commanded position due to high mechanical load, binding, or insufficient motor torque. | Inspect the mechanical system for obstructions or increased friction. Increase the following error tolerance window if acceptable for the application. Verify the motor is correctly sized for the load. |
| Parameter | Value | Unit |
|---|---|---|
| Weight | 5.8 | kg |
| Material | Anodized Aluminum | |
| Voltage | 480VAC | |
| IP Rating | IP20 | |
| Country of Origin | CH | |
| Protocol | EtherCAT | |
| Dimensions | 280 x 110 x 250 mm | |
| Torque | 8 Nm |