SZGH Arm-2442: 4-Axis Collaborative Robot Arm — 2 kg Payload | 420 mm Reach | Drag Teaching

What Is the SZGH Arm-2442?

The SZGH Arm-2442 is a four-axis collaborative robot arm delivering 2 kg standard payload (3 kg max), 420 mm reach, and ±0.03 mm repeatability. It supports drag teaching and collision detection, connects via Ethernet or Wi-Fi, and accepts 220 V/110 V input — making it suitable for PCB dispensing, small-part assembly, laboratory automation, and flexible small-batch production without requiring programming expertise.

Full Specifications

Z-Axis customization note: Standard stroke is configurable from 100 mm to 1,000 mm at order. This is the widest range in the Arm series — double the maximum of the entry-level Arm-1832 (100–500 mm) — enabling applications with large vertical height variation.

Core Advantages

Drag Teaching — Zero Programming Barrier

Arm-2442 supports full drag teaching: the operator physically guides the arm through the desired path, and the controller records each waypoint automatically. No G-code, no PLC ladder logic, no robot programming language is required. Production engineers with zero robotics background routinely complete new task setup in under a day. This capability is shared with the entry-level Arm-1832 and is the defining operational advantage of the lighter Arm models over the heavier Arm-4160.

±0.03 mm Repeatability — Precision Beyond Most Dispensing & Assembly Needs

At ±0.03 mm, the Arm-2442 exceeds the tolerance requirements of the vast majority of PCB dispensing (typically ±0.1 mm), micro-component placement, and lab pipetting applications. Every repeat cycle returns to the recorded position within this window, regardless of ambient temperature fluctuation within the rated range.

Collision Detection — Operator and Tooling Safety

The embedded collision detection module monitors motor torque deviation in real time. Any unexpected contact — whether an operator's hand, a misaligned workpiece, or an obstructed path — triggers an immediate stop. This eliminates the heavy safety caging typically required around industrial robots, allowing the Arm-2442 to work in shared human–machine spaces.

420 mm Reach + 1,000 mm Z-Axis — Substantially Wider Work Envelope Than Entry-Level

The 420 mm horizontal reach (100 mm more than Arm-1832's 320 mm) combined with the optional 1,000 mm Z-axis stroke opens up dispensing tables, multi-tier lab racks, and pick-and-place fixtures that would be physically out of reach for the smaller model. The work envelope expansion is proportional: meaningful, not marginal.

Ethernet + Wi-Fi + Dual Voltage — Deploy Anywhere, No Infrastructure Lock-In

Wired Ethernet delivers deterministic latency for time-critical synchronization; Wi-Fi enables cable-free placement when the workcell layout changes. The 220 V/110 V dual-voltage power supply means the same robot ships to any country without transformer adapters, simplifying global procurement and spares management.

Application Scenarios

Arm Series Internal Comparison

Selection Guide

• Choose Arm-1832 if payload is under 1 kg, reach under 320 mm, and lowest cost/footprint is the priority (e.g., benchtop education demos, very light pipetting).

• Choose Arm-2442 if payload is 1–3 kg, drag teaching or collision detection is required, and the Z-axis needs to exceed 500 mm. This is the most versatile general-purpose model in the series.

• Choose Arm-4160 if payload exceeds 3 kg or reach beyond 420 mm is required, and the task is fixed-program, high-repetition work where drag teaching is not needed (e.g., laser engraving, fixed labeling lines). Note: Arm-4160 does not support drag teaching or collision detection due to its higher structural rigidity at the 3.5 kg load rating.

Customer Case Study

By Fannie Chen, CEO, Shenzhen Guanhong Automation Co., Ltd. (SZGH)

An electronics contract manufacturer in Indonesia came to us with a specific problem: PCB adhesive dispensing. Each board required approximately 120 glue points at ±0.1 mm tolerance. The line had been running entirely on manual dispensing — operator hand-steadiness directly determined yield. Their defect rate per batch was running at 4–7%, and glue consumption was inconsistent enough that material costs were difficult to forecast.

The Arm-2442's ±0.03 mm repeatability is more than three times tighter than the ±0.1 mm the process required, so there was clear headroom. We paired it with a dispensing controller for volume regulation and a vision positioning module to compensate for slight board placement variation on the fixture.

The part that concerned their automation engineer most was operator adoption. He had a team with no robotics background and was worried about a long learning curve. In practice, drag teaching removed that barrier entirely: their production engineer physically guided the arm through all 120 glue points, the controller logged each position, and the full program was complete in half a day. No code was written.

After deployment: yield stabilized at 99.4% — a 2.6 to 5.6 percentage point improvement over the manual baseline. Glue consumption dropped approximately 18% because each point now dispenses a fixed, calibrated volume rather than depending on the operator's feel. The automation engineer told me the drag teaching was "simpler than he imagined." That is the most consistent piece of feedback we receive on this model.

Control System & Compatible Accessories

The Arm-2442 ships with the SZGH dedicated four-axis robot controller, which supports:

• Drag teaching mode — one-button activation, records Cartesian and joint-space waypoints

• Point-to-point (PTP) and continuous path (CP) motion modes

• I/O expansion — digital inputs/outputs for integration with conveyors, dispensing controllers, vision systems, and safety barriers

• Ethernet port — for PC-based programming, remote monitoring, and MES/SCADA integration

• Wi-Fi module — for wireless program upload, remote parameter adjustment, and order management system connectivity

• Teach pendant — optional handheld pendant for on-machine parameter editing

Compatible end-effectors and accessories (available separately):

• Vacuum gripper kits (single and multi-cup)

• Pneumatic parallel gripper

• Dispensing valve adapter mount

• Vision positioning camera bracket

• Electric screwdriver spindle mount

• Custom end-effector flange (specify at order)

Contact export02@szghtech.com for controller integration documentation and I/O wiring diagrams.

Certifications & Warranty

All Arm-2442 units are assembled and tested at our Shenzhen facility before shipment. Factory acceptance testing (FAT) reports available on request.

Frequently Asked Questions

Q1: What is the difference between a collaborative robot and an industrial robot?

A collaborative robot (cobot) is designed to work alongside human operators in a shared workspace. It operates at lower speeds and forces, incorporates safety features such as collision detection, and typically does not require heavy safety fencing. An industrial robot prioritizes maximum speed and payload in fenced, human-excluded cells. The Arm-2442 sits between a desktop robot and a full industrial robot: it offers industrial-grade repeatability (±0.03 mm) in a compact, human-safe form factor suitable for benches, labs, and small production lines.

Q2: How does drag teaching work on the Arm-2442?

Press the drag teaching button on the controller or teach pendant to enter drag mode. The servo brakes release, and the arm becomes free to move by hand. Guide the arm through each waypoint or along the desired path at a comfortable pace. Release the button to exit drag mode — the controller saves all recorded positions. The saved program can then be played back at full speed. No computer, no code, and no robotics training is required.

Q3: What happens when the Arm-2442 detects a collision?

The collision detection system continuously monitors the torque on each joint. If actual torque deviates from the expected motion profile beyond a configurable threshold — indicating unexpected contact — all joint servos stop immediately and the controller logs an alarm. The arm does not resume motion until the alarm is cleared by the operator. This protects both personnel and tooling.

Q4: Can the Arm-2442 handle a 3 kg payload continuously?

The rated standard payload is 2 kg for continuous multi-shift operation. The 3 kg maximum payload is for intermittent cycles with adequate duty-cycle consideration. For sustained 3 kg applications, contact us to discuss duty cycle planning and confirm the specific end-effector center-of-gravity offset.

Q5: What is the maximum Z-axis stroke, and can I change it after purchase?

The Z-axis stroke is configurable from 100 mm to 1,000 mm and is specified at order. It is a mechanical parameter built into the linear axis assembly and cannot be field-adjusted after manufacture. Specify your required stroke when requesting a quotation.

Q6: Does the Arm-2442 work with a vision system?

Yes. The Ethernet and Wi-Fi interfaces allow the robot controller to receive position correction data from an external vision system (2D or 3D camera). SZGH offers a compatible vision positioning module. Third-party vision systems with standard TCP/IP communication protocols are also supported. Contact us for integration documentation.

Q7: What programming options are available beyond drag teaching?

The SZGH controller supports point-to-point and continuous-path programming via the teach pendant, PC-based software over Ethernet, and remote command upload over Wi-Fi. For integration into MES or order management systems, the controller exposes a TCP/IP command interface. Detailed API documentation is provided with the unit.

Q8: How does the Arm-2442 compare to a SCARA robot for dispensing applications?

A traditional SCARA robot (e.g., SZGH S450-B-4) offers higher horizontal speed and is optimized for high-throughput pick-and-place in fixed, high-volume lines. The Arm-2442 is better suited when the task requires: (a) drag teaching for fast re-programming between product types, (b) collision detection for safety in shared spaces, (c) Z-axis strokes beyond 500 mm, or (d) a lower total investment for medium-volume flexible lines. For pure speed in a single high-volume dispensing task, a SCARA may be more efficient.

Request a Quote

Ready to configure your Arm-2442? Contact our export team for pricing, Z-axis stroke options, lead time, and shipping to your country.

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Related Products

• SZGH Arm-1832 — Entry-Level 4-Axis Cobot, 0.5 kg, 320 mm Reach — Best for education, light lab tasks, and lowest-cost automation entry point. Also supports drag teaching and collision detection.

• SZGH Arm-4160 — Flagship 4-Axis Cobot, 3.5 kg, 600 mm Reach — Maximum payload and reach in the Arm series. Ideal for laser engraving, heavy tool handling, and fixed-program high-repetition tasks.

• SZGH S450-B-4 — High-Speed SCARA Robot — High-throughput horizontal pick-and-place and assembly for dedicated production lines requiring maximum cycle speed.

• SZGH T9905 — Six-Axis Precision Robot — Six degrees of freedom for complex spatial paths, welding, and multi-angle assembly where four axes are insufficient.