G6-651S SCARA Robotic Arm (Manipulator)
SCARA Robot · Load 6 kg · Arm length: 650 mm
G6-651S specifications
The G6 series is part of our next-generation G Series SCARA robot lineup, incorporating all our latest achievements in advanced robot design and performance. The G6 high-rigidity arm combined with our PowerDrive servo technology delivers Epson's long-awaited high performance.
Model introduction
The G6 series is part of our next-generation G Series SCARA robot lineup, incorporating all our latest achievements in advanced robot design and performance. The G6 high-rigidity arm combined with our PowerDrive servo technology delivers Epson's long-awaited high performance. High performance: Maximum motion range, Max-E design achieves high space utilization; A cycle time of 0.39 seconds can increase the total throughput of components; Excellent acceleration/deceleration rates and smooth start/stop times; High speeds can reach nearly 8000 millimeters per second, enabling components to operate quickly and precisely; Unique high-rigidity arm design with low residual vibration. Diverse arm types and configurations: arm lengths of 450, 550, and 650 mm are available, allowing customers to choose the optimal working arm; Models for countertop, ceiling, and sidewall installation; Models compliant with ISO Clean (ISO14644-1:2015) and ESD standards are suitable for semiconductor and electrostatic-sensitive applications, such as hard disk drive assembly; The Z-axis offers 180 mm (150 mm, clean) and 330 mm (300 mm, clean) arm lengths. Powerful controllers and development software: Epson RC+ offers industry-leading ease of use, reducing development time; The dual-layer controller enables high-performance or low-cost G6 robot solutions; Integrated options maximize system performance and shorten overall development time; Outstanding processing performance, faster than similar Epson models
Exclusive highlights of the G6-651S
Maximum motion range, Max-E design achieves high space utilization; A cycle time of 0.39 seconds can increase the total throughput of components; Excellent acceleration/deceleration rates and smooth start/stop times; High speeds can reach nearly 8000 millimeters per second, enabling components to operate quickly and precisely; Unique high-rigidity arm design with low residual vibration
Available in arm lengths of 450, 550, and 650 mm, allowing customers to choose the optimal working arm; Models for countertop, ceiling, and sidewall installation; Models compliant with ISO Clean (ISO14644-1:2015) and ESD standards are suitable for semiconductor and electrostatic-sensitive applications, such as hard disk drive assembly; The Z-axis offers arm lengths of 180 mm (150 mm, clean type) and 330 mm (300 mm, clean type).
Epson RC+ offers industry-leading ease of use, shortening development time; The dual-layer controller enables high-performance or low-cost G6 robot solutions; Integrated options maximize system performance and shorten overall development time; Outstanding processing performance, faster than similar Epson models
Automobiles — mirror/glass assembly, ignition module assembly, assembly and testing of headlights and taillights, transmission assembly, clutch assembly, fuel injector assembly, dashboard assembly, engine cover and trunk lock assembly; Hard disk drives—additional protective cases, optical disc polishing, cassette tape assembly, high-precision driver assembly; Medical — surgical blade processing, dental instrument insertion and molding, pacemaker battery assembly, laser wire limiting welding, hearing aid assembly; Laboratory automation — straw packaging, DNA testing and sequencing, blood analysis, tube capping, tube handling; Consumer products — home appliance assembly, paint brush assembly, electric toothbrush assembly, electric saw assembly, speaker manufacturing, weed trimmer assembly, connector assembly; Industrial products — casting equipment loading/unloading, smoke detector assembly, fiber optic connector assembly
G Series SCARA · Classic High Reliability · Series technical features
The G Series is Epson's classic SCARA product line, covering loads ranging from G1 to G20 weighing 0.5-20kg, known for its PowerDrive servo technology and high-rigidity arm design, and has long dominated precision manufacturing production lines.
Epson's self-developed servo technology enables high-speed, smooth start/stop and excellent acceleration and deceleration characteristics.
The G Series has large shipments and high inventory, with abundant maintenance documentation and spare parts resources.
Countertop, ceiling, and sidewall mounting models are fully available to suit different production line layouts.
High-performance or economical controllers can be selected as needed, balancing performance and cost.
Applicable industries
Typical applications of this model in the following industries (click to view industry solutions).
Mirror/glass assembly, ignition module assembly, front and taillight assembly and testing, transmission assembly, clutch assembly, fuel injector assembly, dashboard assembly, engine hood and trunk lock assembly
Additional protective cover, CD polishing, cassette tape assembly, high-precision drive assembly
Surgical blade processing, dental instrument insertion and molding, pacemaker battery assembly, laser wire limiting welding, hearing aid assembly
Straw packaging, DNA testing sequencing, blood analysis, tube capping, and tube handling
Home appliance assembly, paint brush assembly, electric toothbrush assembly, chainsaw assembly, speaker manufacturing, weed trimmer assembly, connector assembly
Casting equipment loading/unloading, smoke detector assembly, fiber optic connector assembly, bulb assembly, hydraulic valve testing
Typical application scenarios
Common application processes for this model (click to view process details):
G Series SCARA · Classic High Reliability · Other models in the same series
Compare load and reach to choose the model that best suits your process.
G6-651S model positioning and working condition adaptation
G6-651S Belongs to the Epson G Series SCARA · The classic highly reliable SCARA horizontal multi-joint robot model has a rated load of 6kg, a motion radius of 650mm, and a repeatability of ±0.015mm. 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 RC700-A, and the program ecosystem is SPEL+ language (BASIC style) + Vision Guide visual.
From the perspective of working condition adaptation, the typical use for lightweight load (6kg) positioning is:Machine tool loading and unloading, 3C assembly, inspection, and handling of small and medium-sized parts。 The short arm (650mm) model has a compact structure, suitable for dense workstations and close-range pick-and-place operations, with a small working unit footprint. ± 0.015mm repeatability is the standard level for six-axis industrial robots, covering most working conditions such as welding, handling, palletizing, and loading/unloading. The end fixture is counted as a load from the most important point—the total of gripper + workpiece + sensor should not exceed 80% of the rated value. Workpieces with high inertia (long rod/uneven load) should be checked separately.
| Parameters | Engineering interpretation and usage recommendations |
|---|---|
| Rated load: 6kg | 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: 650mm | 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: ±0.015mm | 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: 28kg | 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-A | 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 G6-651S comes with the RC700-A controller, with a programming language and development environment of SPEL+ (BASIC style) + Vision Guide for vision. 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 G6-651S
This site is a third-party robotics technology service provider. The eight major business supports related to the G6-651S are as follows (sorted by service frequency of each model):
- Maintenance and repair: For on-site diagnostics, board-level maintenance, and annual maintenance contracts for the G6-651S—such as periodic inspection and adjustment of synchronous belt tension (SCARA unique item), we implemented brand-exclusive items according to SOPs, and Sichuan-Chongqing responded on the same day.
- 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; The G6-651S or equivalent models in the warehouse 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: Process programming, trajectory optimization, tap time potential, and model change formula management for the G6-651S, with targeted commissioning for machine tool loading and unloading, 3C assembly, inspection, and handling of small and medium parts.
- Research and development of automation equipment: Custom fixture ends, peripheral tooling, and safety fences for the G6-651S, with interfaces designed according to Epson flange and IO standards.
- Robot rental: For short-term capacity or process validation periods, you can rent the G6-651S equivalent in-stock model, including transportation, installation, and commissioning; flexible rental period allows for repurchasing.
Common issues with this device
Is it easy to find spare parts for the G6-651S?
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 6kg, how much weight 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 G6-651S 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