Inspire EG2-4B Dexterous Robot Hand (EG2-4B)

EG2-4B Dexterous Robot Hand (EG2-4B)

Although it may be marketed alongside “dexterous hand” components in some product catalogs, the EG2-4B is functionally an electric gripper designed for controlled closing/opening over a relatively long stroke, with adjustable grip force and position control.

In typical deployments, the EG2-4B mounts at the end of a robotic arm or mobile manipulator and is controlled over a serial communication link (notably RS485 on the “X2” generation), enabling parameterized commands for opening width, force limits, and status feedback. This combination of compact mechanics and integrated control electronics targets applications such as service robotics, education, light automation, and benchtop manipulation where pneumatic infrastructure is undesirable.

Design and Features

Mechanical architecture

The EG2-4B uses a parallel-jaw layout: two opposing fingers translate in and out to pinch objects along a straight line. The design is described as an innovative linear mechanical linkage, aiming to provide a large usable stroke in a compact envelope.

A defining safety-oriented feature is power-off self-locking, intended to help retain a grasped object during brief power interruptions (depending on load, friction, and fingertip geometry). This behavior is positioned as advantageous for mobile manipulators and light industrial cells where controlled fail-safe holding is preferred.

Integrated drive and control

Unlike many pneumatic grippers that require external valves and regulators, the EG2 series is described as being equipped with an internal servo/driver module (integrated control), simplifying wiring and lowering integration effort for small robots.

Force and position control concept

Vendor documentation describes force and position control with a small-step repeatability target and tunable “pressure/force” behavior via settings. Operational notes also describe a built-in sensing concept used to support threshold-based gripping of objects with different hardness.

Technology and Specifications

Important note on naming: Specifications are commonly published for EG2-4B2 (RS485 generation). When “EG2-4B” is used generically, it often refers to that EG2-4B2 configuration in current catalogs.

Core published specs (EG2-4B2)

From Inspire’s selection guide and product-series documentation, typical specifications include:

• Stroke (full, both sides): 70 mm

• Grip force range: 0–15 N (often described in some documents as “1.5 kg” class)

• Positioning repeatability: ±0.50 mm

• Force repeatability / adjustment: ±1 N (listed as force repeatability/adjust)

• Maximum speed: 97 mm/s

• Full-stroke closing time: 0.85 s

• Weight: 223 g

• Operating voltage: DC 24 V ±10% (24 V recommended in instructions)

• Peak current: 0.70 A

• Idle/static current (listed): 30 mA (and other current figures may be provided by model)

• Operating temperature (recommended): 0–40 °C

• Ingress protection: IP40

• Communication interface: RS485; RS485 supports MODBUS RTU in the “X2” model documentation

Communications and control

The EG2-4X2 documentation states the gripper uses RS485 and supports MODBUS RTU, enabling relatively straightforward PLC/robot-controller integration through common serial gateways. Power-on behavior is described as defaulting to the maximum opening position, which can simplify initialization in scripted routines.

Applications and Use Cases

Service and mobile robotics

For service robots and mobile manipulators, the EG2-4B’s lightweight mass and self-locking behavior may support safer object retention during motion and brief stops. Inspire documentation explicitly highlights suitability for “service robot” use and teaching aids.

Education, labs, and research prototyping

In educational robotics and research environments, an electric gripper with serial control can be easier to integrate than pneumatics, especially where benches lack compressed air. The ability to command opening width and force thresholds can be useful for demonstrations of grasp planning, compliance, and manipulation.

Light industrial automation

In Inspire’s selection materials, electric grippers are positioned for scenarios such as precision machining and assembly, and broader automation contexts. In practice, a gripper in the 15 N class is typically used for small parts, lightweight fixtures, and packaged items, where reliable repeatable pinching is more important than high clamping forces.

Advantages / Benefits

Simplified integration vs. pneumatics

Electric grippers reduce dependency on air lines, valves, regulators, and leak management. This can make deployment faster in smaller automation cells and mobile platforms, and it can reduce operational overhead compared to pneumatic parallel grippers. (By contrast, larger industrial parallel-gripper families—such as those from SCHUNK—cover a wide range of payloads and specialized variants, but are often paired with more traditional automation infrastructure.)

Controllable force and position

Published materials emphasize controllable grip force and position, plus repeatability targets. This is particularly relevant for handling fragile objects (plastic housings, lab containers, thin-walled parts) where “close until contact” with a set threshold can reduce damage risk.

Power-off self-locking

Self-locking is commonly presented as a safety and reliability feature, especially for mobile robots or collaborative setups where dropping an object could create hazards or cause workflow interruptions.

FAQ Section

What is the Inspire EG2-4B Dexterous Robot Hand?

The Inspire EG2-4B is a compact electric two-finger parallel gripper (often referenced via the EG2-4B2 model) used as an end-effector for robotic arms and mobile manipulators. It is designed for controlled opening/closing, adjustable grip force, and repeatable light-duty grasping.

How does the EG2-4B work?

The gripper uses an internal servo/driver and a linear linkage mechanism to move two fingers in parallel. Commands are sent over a serial interface (commonly RS485 on EG2-4B2), and documentation describes support for MODBUS RTU, enabling control of opening width, force thresholds, and basic operational behaviors.

Why is the EG2-4B important in robotics?

Compact electric grippers like the EG2-4B can simplify robot deployments by avoiding pneumatic systems while still providing parameterized force and position control. Features such as power-off self-locking and published repeatability targets make it useful for education, service robotics, and small automation tasks where integration speed and reliability matter.

What are the benefits of the EG2-4B?

Commonly cited benefits include 70 mm stroke, adjustable grip force, RS485/MODBUS RTU control (EG2-4B2), lightweight construction (~223 g), and power-off self-locking behavior—features that can improve integration speed and grasp reliability for lightweight objects.

What payload can the EG2-4B handle?

Manufacturer materials publish force ranges (e.g., 0–15 N for EG2-4B2), which translate to practical payload depending on object shape, friction, fingertip design, acceleration, and safety margin. For real applications, integrators typically test with representative parts and choose conservative limits rather than relying on a single “payload” number.

Summary

The Inspire EG2-4B (commonly represented by the EG2-4B2 model) is a lightweight electric parallel gripper designed to provide long-stroke, repeatable grasping with serial control and self-locking behavior. Its published combination of 70 mm stroke, adjustable 0–15 N grip force, RS485/MODBUS RTU interface, and compact mass targets practical manipulation in service robots, education, and light automation where fast integration and predictable grasping are priorities.