GX4-A351S SCARA Robotic Arm (Manipulator)
Load 4 kg · Arm length 350 mm
GX4-A351S specifications
ISO (ISO14644-1:2015) Clean & ESD certified models, targeting electrostatic-sensitive applications such as semiconductor and hard drive assemblies
Model introduction
ISO (ISO14644-1:2015) Clean & ESD certified model, designed for electrostatic-sensitive applications such as semiconductor and hard drive assemblies. High performance: battery-free motor unit, cost-saving, reduced downtime, easy maintenance; 0.35 seconds cycle time in high-power mode, producing more products per unit time; The 350mm arm length unique left and right tilted arm model maximizes the utilization of the work area while occupying very little workspace. Countertop and multiple installation methods, bottom cable interface saves space; ± 0.008mm high precision, reducing production losses and improving production efficiency; The unique high-rigidity arm design and GYROPLUS Technology reduce vibration and achieve high stability
GX4-A351S exclusive highlights
Battery-free motor unit, saving costs, reducing downtime, and easy maintenance; 0.35 seconds cycle time in high-power mode, producing more products per unit time; The 350mm arm length unique left and right tilted arm model maximizes the utilization of the work area while occupying very little workspace. Countertop and multiple installation methods, bottom cable interface saves space; ± 0.008mm high precision, reducing production losses and improving production efficiency; The unique high-rigidity arm design and GYROPLUS Technology reduce vibration and achieve high stability
Automotive—mirror/glass assembly, ignition module assembly, headlight and taillight assembly and testing, clutch assembly, fuel injector assembly, dashboard assembly; Hard drives — cover parts, hard drive polishing, cassette tape assembly, high-precision driver assembly; Medical products — surgical blade processing, dental instrument insertion and molding, pacemaker battery assembly, wire quota laser welding, hearing aid assembly; Laboratory automation — pipette encapsulation, DNA sequence testing, blood analysis, tube capping, tube handling; Consumer products — paint brush assembly, electric toothbrush assembly, chainsaw assembly, connector assembly; Industrial products—smoke detector assembly, fiber optic connector assembly, light bulb assembly, hydraulic valve testing
GX Series SCARA · High-performance flagship · Series technical features
The GX series is Epson's high-performance SCARA flagship, with a maximum load capacity of 20kg, a high-rigidity arm and GYROPLUS vibration suppression technology, and a cycle time as fast as 0.33 seconds, designed for high-end assembly applications that require strict beats and precision.
In high-power mode, the cycle time is as low as 0.33 seconds, resulting in higher output per unit time.
The unique high-rigidity arm design combined with GYROPLUS Technology delivers low residual vibration and high stability.
The repeatability of the 1st-2nd joint can reach ±0.008mm, reducing production losses.
Five levels from GX1 to GX20, with multiple installation options for countertops, ceilings, and sidewalls.
Applicable industries
Typical applications of this model in the following industries (click to view industry solutions).
Mirror/glass assembly, ignition module assembly, headlight and taillight assembly and testing, clutch assembly, fuel injector assembly, instrument panel assembly
Cover parts, hard drive polishing, cassette tape assembly, high-precision driver assembly
Surgical blade processing, dental instrument insertion and molding, pacemaker battery assembly, wire quota laser welding, hearing aid assembly
Pipette encapsulation, DNA sequence testing, blood analysis, tube capping, and tube handling
Paint brush assembly, electric toothbrush assembly, electric saw assembly, connector assembly
Smoke detector assembly, fiber optic connector assembly, light bulb assembly, hydraulic valve testing
Typical application scenarios
Common application processes for this model (click to view process details):
GX Series SCARA · High-performance flagship · Other models in the same series
Compare load and reach to choose the model that best suits your process.
GX4-A351S model positioning and working condition adaptation
GX4-A351S Belongs to the Epson GX series SCARA · The high-performance flagship SCARA horizontal multi-joint robot model has a rated load of 4kg, a motion radius of 350mm, and a repeatability of ±0.01mm. Epson's technological foundation is SCARA's global market leader: RS/GX/LS series with high speed and precision, SPEL+ development efficiency, and mature vision integration; The control platform is the RC700-D, and the program ecosystem is SPEL+ language (BASIC style) + Vision Guide visual.
From the perspective of working condition adaptation, typical applications for small load (4kg) positioning are:High-speed sorting, precision assembly, dispensing coating, and inspection/pick-and-place processing。 The short arm (350mm) model has a compact structure, suitable for dense workstations and close-range pick-and-place operations, with a small workspace for the work unit. ± 0.01mm repeatability is precision-grade, meeting the trajectory requirements for precision assembly, dispensing, and inspection guidance. Although the load is light, it is recommended to keep the total weight of the end and workpiece within 70% of the rated value, leaving ample acceleration margin at high speeds.
| Parameters | Engineering interpretation and usage recommendations |
|---|---|
| Rated load 4kg | It is recommended to reserve a load margin of 20%–30%; Verification is made by combining end self-weight + workpiece + imbalanced load inertia, especially sensitive to high-speed conditions |
| Movement radius: 350mm | Determine the radius of the workcell layout: bins, tooling, and fences are bounded by maximum arm span + safety distance; Verify the accessibility of each pick-and-place point during cross-station service |
| Repeatability: ±0.01mm | Repeatability ≠ absolute accuracy: Precision assembly requires external measurement closed-loop or visual guidance; Long-term accuracy trends rely on annual retest management |
| Main body weight: 16kg | Installation base and foundation load-bearing check based on weight + dynamic load; Floor slab installation requires structural calculation, with heavy-duty models serving as independent foundations |
| Controller: RC700-D | Decide on the process ecosystem, spare parts channels, and second-hand residual value; Currently, spare parts channels are smooth, and repair and upgrade paths are mature |
Control systems and common failure modes
The GX4-A351S comes with the RC700-D controller, with a programming language and development environment of SPEL+ (BASIC style) + Vision Guide visual. Maintenance of this generation of control platforms focuses on three basic components: power, storage, and cooling—most "sudden downtime" can be detected in advance when preventive maintenance is in place.
| Failure mode | Typical performance | Disposal recommendations |
|---|---|---|
| SCARA synchronous belt tension attenuation and wear | SCARA Synchronous Belt Tension Attenuation and Wear (Main Cause of Precision Drift) | Included as a mandatory inspection item for annual maintenance, with spare parts stocked in advance |
| The encoder battery is depleted | Encoder battery depleted (loss of origin and calibration data) | Initial interpretation of alarm codes by reference with manuals, remote diagnosis allows for early positioning |
| Driver alarm | Driver alarm (high-speed overcurrent) | Daily inspection coverage, with abnormal trends (abnormal noises/temperature rise/errors) recorded |
| RC controller fan and power supply aging | RC controller fan and power supply aging | Quarterly dust removal maintenance and cabinet temperature monitoring |
| Maintenance projects | Cycle recommendations | Key points |
|---|---|---|
| Timing belt tension adjusted by periodic inspection (SCARA specific item) | By cycle | Timing belt tension adjusted by periodic inspection (SCARA specific item) |
| Annual battery replacement | Year | Battery replacement annually, calibration data backup |
| Guide rails and screw lubrication (LS/GX series) | According to the manufacturer's manual cycle | Guide rails and screw lubrication (LS/GX series) |
| Cable and drag chain inspection | every six months | Insulation, shielding, and bending radius inspection of power and encoder lines, as well as wear of cables inside the drag chain, are the main causes of intermittent faults |
| Zero point and accuracy retest | Every year | Repeatability measured by dial gauges or laser trackers, drift trend digitization—accuracy degradation can be seen six months in advance |
| Control cabinet dust removal and fans | Every quarter | Filter cleaning, fan speed and noise checks, cabinet temperature recording; Dust environments shorten the cycle |
Henghuan's service capabilities for the GX4-A351S
This site is a third-party robotics technology service provider. The eight major business supports related to the GX4-A351S are as follows (ranked by service frequency for each model):
- Maintenance and repair: For on-site diagnostics, board-level maintenance, and annual maintenance contracts for GX4-A351S—periodic inspection and adjustment of synchronous belt tension (SCARA unique item), we will implement brand-exclusive items according to SOPs, with same-day response from Sichuan and Chongqing.
- Used & in-stock robot sales: SCARA has a large second-hand circulation and is the preferred choice for 3C and electronic assembly conditions; Procurement focuses on inspecting belt and guide rail wear; In-stock GX4-A351S or equivalent models come with a full-function test report and a 12-month warranty.
- Sales of new industrial robots: When adding new production lines or replacing entire batches, we conduct cross-brand selection comparisons based on process requirements (including models of the same grade as Epson), and provide configuration and pricing plans.
- Applied technology services: The GX4-A351S features process programming, trajectory optimization, tap time potential, and mold change formula management, with targeted tuning for high-speed sorting, precision assembly, dispensing and coating, and inspection, pick-and-place operations.
- Research and development of automation equipment: Custom fixture ends, peripheral tooling, and safety fences for GX4-A351S, with interfaces designed according to Epson flange and IO standards.
- Robot rental: For short-term capacity or process validation periods, the GX4-A351S equivalent in-stock model can be rented, including transportation, installation, and commissioning, with flexible rental periods and flexible purchase options.
Common issues with this device
Is it easy to find spare parts for the GX4-A351S?
Epson: The spare parts channel for this generation is smooth; we have in-stock or short-cycle channels for standard parts such as drivers, power modules, batteries, and teach pendant components; It is recommended to allocate consumables for periodic inspection and adjustment of synchronous belt tension (SCARA specific items) according to the annual maintenance contract.
With a nominal load of 4kg, how much can it actually handle?
The rated load is the static load limit of the flange surface. In actual selection, three factors must be considered: the self-weight of the end fixture (vacuum suction cup groups or grippers often account for 2–5kg), the inertia generated by the workpiece offload (checked according to the inertia ratio when the center of gravity deviates from the flange center), and the dynamic load during high-speed movement. The conventional engineering practice is to keep the "end + workpiece" within 70%–80% of the rated value to ensure cycle time and service life.
If the equipment's accuracy deteriorates after several years of use, how can it be restored?
According to the inspection order: first check whether the zero point is drifting (common after collision or battery depletion), then perform zero calibration; Check the reducer's return error (actual measurement of forward and reverse positioning deviation; if exceeded, disassemble or replace); Then check the installation base fastening and foundation settlement; Finally, trajectory compensation parameter restructuring. Most accuracy issues can be mostly restored after calibration and maintenance, so there is no need to rush into major repairs—we first release the inspection data before deciding on the plan.
Is the used GX4-A351S worth buying?
SCARA has a large second-hand circulation and is the preferred choice for 3C and electronic assembly applications; Procurement focuses on checking for belt and guide rail wear. Three essential items for second-hand procurement: comprehensive inspection reports (axial accuracy, driver status, insulation and battery), maintenance history and operating hours, controller generation, and software license integrity. Every used machine we sell comes with inspection records and a 12-month warranty, and we can also accept third-party inspections designated by customers.
Need technical support or procurement for this model?
Whether it's model selection comparison, installation and commissioning, or maintenance of in-use equipment, you can contact Henghuan. Tell us about your processes, loads, and equipment status, and we will provide third-party technical support and solution recommendations.
Contact Henghuan Back to the full series