RB20A3 series Six-axis robotic arm (manipulator)
Medium and heavy load six-axis robot · Load capacity 20kg (-1900 model 15kg) · Reach: 1700/1900mm
RB20A3 Series Specifications
RB20A3 Series medium- and heavy-load six-axis robots, with a payload of 20kg (-1900 model 15kg), and a reach of 1700/1900mm.
Model introduction
RB20A3 Series medium- and heavy-load six-axis robots, with a payload of 20kg (-1900 model 15kg), and a reach of 1700/1900mm. The official website category includes two reach variants. Technical parameters on the Guangzhou CNC official website are published using product poster images. The values on this page are taken from the publicly available parameter table, and the final sample is subject to the official sample.
RB Series Six-Axis Handling/Unloading Robot · Series technical features
Load 3-35kg · AC servo drive
The RB03A1 is officially stated as compact, lightweight, can be used upright or inverted, and the J6 has a maximum speed of 750°/s (reposted specs).
The RB08Q1 is a loading and unloading machine model that works in conjunction with GSK's CNC system, and can be integrated with Haas/FANUC/GSK machine tools (dealer page).
The RB08A3/RB20A3/RB35 each have 2-3 range variants, with long-arm loads reduced accordingly.
Officially, it is said to be suitable for electronics, food and beverage, machinery, pharmaceuticals, grinding and polishing, stamping automation, and more.
Typical application scenarios
Common application processes for this model (click to view process details):
RB Series Six-Axis Handling/Unloading Robot · Other models in the same series
Compare load and reach to choose the model that best suits your process.
RB20A3 series model positioning and working condition adaptation
RB20A3 series This is an industrial robot model belonging to the Guangzhou CNC RB series six-axis handling/loading/unloading robot, with a rated load of 20kg, a motion radius of 1700mm, and a repeatability of ±0.04mm. Guangzhou CNC's technical foundation is an extension of established domestic CNC enterprises, with the RB series offering cost-effective solutions and smooth integration with GSK CNC systems; The control platform is the GSK robot controller (sharing the same origin as the CNC system), and the program ecosystem is GSK robot language + teach pendant.
From the perspective of working condition adaptation, the typical use for medium-duty load (20kg) positioning is:Welding, machine tool wiring, medium-sized palletizing, and die-casting part removalCommon application processes for this model include handling, loading and unloading, grinding, and polishing. The long reach (1700mm) covers multiple stations and large pallets, reducing robot movement or coordination with ground track expansion. ± 0.04mm repeatability is the standard level for six-axis industrial robots, covering the vast majority of welding, handling, palletizing, and loading and unloading operations. This level is the main stage for welding and loading; when selecting a positioner or dual stations, pay attention to the total cycle time and interference zone planning.
| Parameters | Engineering interpretation and usage recommendations |
|---|---|
| Rated load capacity: 20kg | 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 |
| Radius of movement: 1700mm | 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: ±0.04mm | Repeatability ≠ absolute accuracy: Precision assembly requires external measurement closed-loop or visual guidance; Long-term accuracy trends rely on annual retest management |
| Number of axes: 6 | Six-axis all-posture capability, the preferred choice for complex trajectory and inclined surface operations |
| Main body weight: 265kg | 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: GSK robot controller (same platform as CNC system) | 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 RB20A3 series supports GSK robot controllers (sharing the same platform as CNC systems), with a programming language and development environment of GSK robot language + teach pendant. 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 |
|---|---|---|
| Driver and power module failure | Driver and power module failure | Included as a mandatory inspection item for annual maintenance, with spare parts stocked in advance |
| Encoder feedback anomaly | Encoder feedback anomaly | Initial interpretation of alarm codes by reference with manuals, remote diagnosis allows for early positioning |
| Showing the wear and tear of the teaching device | Showing the wear and tear of the teaching device | Daily inspection coverage, with abnormal trends (abnormal noises/temperature rise/errors) recorded |
| Parameter loss | Parameter loss (when backup policy is missing) | Quarterly dust removal maintenance and cabinet temperature monitoring |
| Maintenance projects | Cycle recommendations | Key points |
|---|---|---|
| Replace the battery as prompted | According to the manufacturer's manual cycle | Replace the battery as prompted |
| Lubrication should be carried out according to the manual cycle | According to the manufacturer's manual cycle | Lubrication should be carried out according to the manual cycle |
| Program parameters are backed up regularly | Periodically | Program parameters are backed up regularly |
| 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 RB20A3 series
This site is a third-party robotics technology service provider. The RB20A3 series supports eight major business services (listed by service frequency of each model):
- Maintenance and repair: For on-site diagnostics, board-level repairs, and annual maintenance contracts for the RB20A3 series—battery replacement as prompted, we follow SOPs and respond to Sichuan-Chongqing on the same day.
- Used & in-stock robot sales: A price-sensitive market stock is increasing, making it a practical choice for conventional handling and palletizing operations; The RB20A3 series 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 level in Guangzhou CNC), and provide configuration and pricing plans.
- Applied technology services: Process programming, trajectory optimization, cycle potential tapping, and remolding formula management for the RB20A3 series, with targeted tuning according to handling, loading/unloading, grinding, and polishing conditions.
- Research and development of automation equipment: Custom fixture ends, peripheral tooling, and safety fences for the RB20A3 series, with interfaces designed according to Guangzhou CNC flange and IO standards.
- Robot rental: Short-term capacity or process validation periods can be used for renting RB20A3 series models in the same class in stock, including transportation, installation, and commissioning, with flexible rental periods and flexible options for transfer.
Common issues with this device
Is it easy to find spare parts for the RB20A3 series?
Guangzhou CNC: 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 replace consumable parts according to the prompts and configure the battery according to the annual maintenance contract.
With a nominal load of 20kg, 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 RB20A3 series worth buying?
The price-sensitive market stock is gradually increasing, making it a practical choice for conventional handling and palletizing operations. 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