NJ-650-2.7 Six-axis robotic arm (manipulator)
650 kg / 2703 mm
NJ-650-2.7 Specifications
Comau NJ Series six-axis universal/heavy-duty robots.
Model introduction
NJ-650-2.7: Rated load 650 kg · Maximum reach: 2703 mm · Repeatability: 0.15 mm · Number of axles: 6. Specifications are sourced from Comau COMAU's official website.
NJ / N Series Heavy-Duty Robots · Series technical features
Load 170-650kg · Casting and handling
The NJ-650-2.7 is the official 650kg model at the top of the load spectrum.
Official website NJ-420-3.0 spec IP65/IP67, compatible with foundry workshops.
High-load torque supports high-inertia ends of welding tongs (official website parameters).
The official website lists applications such as casting, spot welding, palletizing, and press press loading and unloading.
NJ / N Series Heavy-Duty Robots · Other models in the same series
Compare load and reach to choose the model that best suits your process.
NJ-650-2.7 Model positioning and working condition adaptation
NJ-650-2.7 This is an industrial robot model belonging to Comau's NJ/N series heavy-duty robots, with a rated load of 650kg and a motion radius of 2703mm. Comau's technical foundation is based on Fiat heritage, with traditional strengths in automotive welding and heavy hauling, and the H5/Racer series stands out for its high-speed performance. The control platform is C5G / SMART5 and NJ series controllers, with a program ecosystem of PDL language + teach pendant.
From the perspective of working condition adaptation, typical applications for heavy-duty (650kg) positioning are:Vehicle body handling, large casting processing, building materials and heavy palletizing。 The extra-long reach (2703mm) is suitable for large workpieces and cross-line services, with attention to stiffness and vibration during large overhanging postures. For heavy-duty models, the foundation is poured according to the manufacturer's drawings and settlement observation is conducted, with hoisting and maintenance space reserved during the layout phase.
| Parameters | Engineering interpretation and usage recommendations |
|---|---|
| Rated load capacity: 650kg | 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: 2703mm | 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 |
| Number of axes: 6 | Six-axis all-posture capability, the preferred choice for complex trajectory and inclined surface operations |
| Controllers: C5G / SMART5 and NJ series controllers | 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 NJ-650-2.7 comes with C5G / SMART5 and NJ series controllers, with a programming language and development environment of PDL + 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 |
|---|---|---|
| Controller board failure | Controller board failure (long spare parts cycle from older generations) | Included as a mandatory inspection item for annual maintenance, with spare parts stocked in advance |
| Encoder and feedback system abnormalities | Encoder and feedback system abnormalities | Initial interpretation of alarm codes by reference with manuals, remote diagnosis allows for early positioning |
| Aging of driver power devices | Aging of driver power devices | Daily inspection coverage, with abnormal trends (abnormal noises/temperature rise/errors) recorded |
| Teach pendant and cable loss | Teach pendant and cable loss | Quarterly dust removal maintenance and cabinet temperature monitoring |
| Maintenance projects | Cycle recommendations | Key points |
|---|---|---|
| Batteries should be replaced periodically | By cycle | Batteries should be replaced periodically |
| It is recommended to conduct a health assessment of the control system for existing automotive wiring equipment | According to the manufacturer's manual cycle | It is recommended to conduct a health assessment of the control system for existing automotive wiring equipment |
| Lubricate the reducer according to the manual | According to the manufacturer's manual cycle | Lubricate the reducer according to the manual |
| 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 NJ-650-2.7
This site is a third-party robotics technology service provider. The NJ-650-2.7 supports the following eight major services (sorted by service frequency of this model):
- Maintenance and repairFor on-site diagnostics, board-level repairs, and annual maintenance contracts for NJ-650-2.7—battery replacement by cycle, we follow SOPs and respond to Sichuan-Chongqing on the same day.
- Used & in-stock robot sales: Many retired equipment from automobile factories, with stable heavy engine residual value; For old controller projects, it is recommended to simultaneously evaluate upgrade plans; In-stock models NJ-650-2.7 or equivalent come with a full functional 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 class as Comau), and provide configuration and pricing plans.
- Applied technology services:Process programming, trajectory optimization, cycle time potential, and model change formula management for NJ-650-2.7, with targeted commissioning for vehicle body handling, large casting handling, building materials, and heavy-duty palletizing conditions.
- Research and development of automation equipment: Custom fixture ends, peripheral tooling, and safety fences for NJ-650-2.7, with interfaces designed according to Comau flange and IO standards.
- Robot rental: For short-term capacity or process validation periods, the NJ-650-2.7 equivalent model in stock can be rented, including transportation, installation, and commissioning, with flexible rental periods and can be repurchased.
Common issues with this device
Is it easy to find spare parts for NJ-650-2.7?
Comau This generation has smooth spare parts channels; 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 configure consumables for battery replacement periodically according to the annual maintenance contract.
With a nominal load of 650kg, 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 NJ-650-2.7 worth buying?
Many retired equipment at the automobile factory has stable salvage value of heavy machinery; For older controller projects, it is recommended to simultaneously evaluate upgrade plans. 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