A 3 axis ROV robotic arm can give underwater remotely operated vehicles (ROVs) more flexibility when carrying out inspection, positioning, and object-handling tasks. A three-function underwater manipulator combines movement and gripping capabilities, allowing an ROV to perform practical manipulation tasks underwater.
The S3 3-Function Manipulator from Nanjing Huayan Dynamic Seal Technology Co., Ltd. is one example of this type of underwater electric arm. The S3 features two degrees of freedom and one jaw, providing pitch, rotary, and gripper functions. End tools can also be installed according to specific application requirements. The S3 is designed for underwater operation at depths of up to 300 m and has a 3 kg lift capacity.
What Are the Three Functions of a 3 Axis ROV Robotic Arm?
The three functions of the S3 include two movement functions and one gripping function: pitch, rotary movement, and gripper operation. According to the product specifications, the S3 provides up-and-down and rotation functions, while its end tools can be configured according to user requirements.
1. Pitch Movement
Pitch controls the up-and-down movement of the manipulator. This allows the arm to adjust the position and orientation of the end tool when approaching an underwater object.
For the S3, the pitch working range is 0–170°, with a rated speed of 13.5°/s and rated torque of 20 N·m.
2. Rotary Movement
The rotary function allows the arm to rotate around its rotational axis. This gives the manipulator additional positioning flexibility when approaching an underwater target from different directions.
The S3 provides a rotary working range of ±360°, with a rated speed of 60°/s and rated torque of 1.8 N·m.
3. Gripper Function
The third function is the gripper. Once the movement functions position the end of the arm near a target, the gripper can open and close to hold or manipulate the object.
The S3 gripper has a maximum opening of 69°, a clamping range of 0–100 mm, and a maximum clamping force of 300 N. Its opening and closing time is no more than 5 seconds.
Together, these three functions give the S3 both positioning and gripping capabilities for underwater manipulation tasks.
Understanding the 2 DOF + 1 Jaw Structure
One of the main features of the S3 is its 2 degrees of freedom (DOF) + 1 jaw configuration. The two degrees of freedom provide movement, while the jaw performs the gripping function.
During operation, the movement functions position the end of the arm, while the jaw interacts directly with the target. This makes it possible to combine positioning and gripping in a single underwater electric arm.
The S3 uses a servo motor drive and supports position and speed control. Its endpoint accuracy is specified at the millimetre level, while communication can be carried out through RS485/Ethernet.
What Types of Underwater Robots Can Use It?
A 3 axis ROV robotic arm can be useful for underwater robots that need positioning and gripping capabilities in addition to cameras, sensors, or other equipment. The right configuration depends on factors such as payload, working depth, gripping requirements, and range of motion.
Compact ROV Platforms
For relatively lightweight underwater robot platforms, a three-function arm can provide positioning and gripping capabilities without requiring a more complex configuration.
The S3 has an air weight of 3.25 kg, a water weight of 1.9 kg, and a 3 kg lift capacity. These specifications make it suitable for underwater manipulation tasks within its rated capacity.
Inspection ROV Applications
Inspection ROVs can use a manipulator to interact with objects during underwater inspection. The arm can help position an end tool, approach a target, or grip an object that needs to be handled during an inspection task.
The combination of pitch, rotary movement, and gripping gives an ROV additional manipulation capabilities.
Light-Duty Subsea Operations
ROVs used for light-duty subsea operations can also use a three-function manipulator when controlled positioning and gripping are required.
For the S3, the waterproof depth is specified at ≤300 m, while its 3 kg lift capacity and 300 N clamping force define the rated operating range.
S3 3-Function Manipulator for ROV Applications
The S3 3-Function Manipulator combines two degrees of freedom with one jaw in an underwater electric arm. Its pitch range of 0–170°, rotary range of ±360°, 0–100 mm clamping range, and 300 N clamping force provide the movement and gripping capabilities specified for the product.
For ROV applications, the S3 provides three core functions: pitch movement, rotary movement, and gripper operation. Its rated waterproof depth, lift capacity, gripping range, and control options can be considered when evaluating whether the S3 is suitable for a particular underwater robot application.
When selecting a 3 axis ROV robotic arm, it is useful to consider the required working depth, payload, gripping range, movement requirements, and control interface. For applications that match these requirements, the S3 3-Function Manipulator provides a compact 2-DOF + 1-jaw configuration for underwater positioning and gripping.
https://www.huayandynamicseal.com/3-axis-rov-robotic-arm.html
Nanjing Huayan Dynamic Seal Technology Co., Ltd.
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