Which NexBot robots and axes use the SD131-008 Servo Drive?
This article details the compatibility of the NexBot Safety SD131-008 Single-Axis Servo Drive, identifying its primary use in the J4, J5, and J6 axes of specific NexBot R-20 series robots.
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This article provides detailed compatibility information for the NXB-SRV-SD131-008 NexBot Safety SD131-008 Single-Axis Servo Drive. Understanding which robot axes this component is designed for is critical for correct part selection during maintenance and system integration.
Answer
The NXB-SRV-SD131-008 is a high-performance servo drive specifically engineered for the dynamic, high-precision requirements of the wrist and forearm axes in NexBot articulated robots. Its primary application is controlling the following joint positions:
- J4 (Wrist Roll)
- J5 (Wrist Pitch)
- J6 (Wrist Yaw/Flange Roll)
This drive is most commonly found in the NexBot R-20 Series of articulated robots. While the drive's EtherCAT protocol and power rating may allow for use in custom applications, its designated role within the standard NexBot product ecosystem is for these specific axes.
Detailed Compatibility
NexBot R-20 Series
The R-20 is a 6-axis articulated robot. The NXB-SRV-SD131-008 is the standard drive for the final three axes (J4, J5, J6). These axes require rapid acceleration and precise positioning for tool orientation, which aligns with the drive's performance characteristics.
Other Robot Series
- NexBot C-10 (Collaborative): This series uses different, lower-power integrated drive modules suited for collaborative applications and is not compatible with the SD131-008.
- NexBot S-5 (SCARA): SCARA robots typically have 4 axes with different motion dynamics. The S-5 series utilizes a different set of servo drives tailored to its specific architecture.
Key Specifications of the NXB-SRV-SD131-008
To understand why this drive is suited for these axes, review its core specifications:
- SKU: NXB-SRV-SD131-008
- Continuous Current: 8A
- Nominal Torque Output: 8 Nm
- Input Voltage: 400-480VAC 3-Phase
- Control Protocol: EtherCAT
- IP Rating: IP20
- Dimensions: 220 x 75 x 180 mm
The 8A current rating provides the agility needed for the smaller motors of the J4, J5, and J6 axes, which manipulate the end-of-arm tooling rather than the entire robot arm structure.
Tips
- Verification: Always verify the part number on the side of the existing drive before ordering a replacement. The drive's location in the robot controller cabinet should be labeled with the corresponding axis number.
- Configuration: A replacement NXB-SRV-SD131-008 drive will require the correct firmware and parameter file for the specific axis (J4, J5, or J6) it will be controlling. These files are typically loaded using the NexBot service software.
- Mismatched Drives: Do not attempt to install this drive on axes J1, J2, or J3. These larger axes require drives with significantly higher current and torque ratings to handle the high-inertia loads of the main arm segments.
Related Topics
- Troubleshooting EtherCAT Communication Faults with SD131 Series Drives
- Procedure for Servo Drive Parameter Backup and Restore
- Replacing a Servo Drive in an R-20 Robot Controller