KR C4 smallsize-2 Six-axis robotic arm (manipulator)
The KUKA KR C4 control system is a pioneer in automation now and in the future.
KR C4 smallsize-2 specifications
The KUKA KR C4 control system is a pioneer in automation now and in the future. It reduces costs related to integration, maintenance, and upkeep. At the same time, system efficiency and flexibility will continue to be improved—thanks to the universal open industrial standards.
Control Cabinet · Series technical features
KR C5 / KR C4 / KR CS / KR C2 / Sunrise Cabinet: A complete family of controllers covering micro to standard, offering high-performance movement control.
Smaller size and lower energy consumption, covering everything from micro to heavy-duty coverage.
Supports plug-and-play for 1000+ third-party devices.
Control Cabinet · Other models in the same series
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KR C4 smallsize-2 model positioning and working condition adaptation
KR C4 smallsize-2 This belongs to the KUKA control cabinet industrial robot model; load parameters are subject to the official manual. KUKA's technical foundation is KRL's clear program structure, PC-based control architecture is open, and there is a large stock of automotive welding lines; The control platform is KR C4 / KR C5 (older models KR C1 / KR C2), and the program ecosystem consists of KRL language + smartPAD teach pendant.
From the perspective of operating condition adaptation, typical applications for positioning this load level are:Handling, assembly, and general automation。 Specific load parameters are subject to the nameplate and official manual.
| Parameters | Engineering interpretation and usage recommendations |
|---|---|
| Protection rating: IP54 | Suitable for standard workshop environments; Dusty and moisture-prone workstations require additional protective kits or positive pressure protection |
| Main body weight: 60kg | 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 |
| Controllers: KR C4 / KR C5 (Old KR C1 / KR C2) | 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 KR C4 Smallsize-2 comes with the KR C4 / KR C5 (older models KR C1 / KR C2) controllers, with a programming language and development environment of KRL + smartPAD 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 |
|---|---|---|
| KRC4 power module | KRC4 power module (KPP/KSP) fault and fuse blown | Included as a mandatory inspection item for annual maintenance, with spare parts stocked in advance |
| Windows system disk aging and damage | Windows system disk aging and damage (KRC4 is Windows-based, mechanical hard drives are a weak link) | Initial interpretation of alarm codes by reference with manuals, remote diagnosis allows for early positioning |
| Control cabinet fan unit and temperature control fault | Control cabinet fan unit and temperature control fault | Daily inspection coverage, with abnormal trends (abnormal noises/temperature rise/errors) recorded |
| DSE/RDC board communication failure | DSE/RDC board communication fault (rotary transformer link) | Quarterly dust removal maintenance and cabinet temperature monitoring |
| Maintenance projects | Cycle recommendations | Key points |
|---|---|---|
| Regular system image backup (hard drive failure under Windows architecture can be quickly restored) | Periodically | Regular system image backup (hard drive failure under Windows architecture can be quickly restored) |
| It is recommended to upgrade the SSD or replace the mechanical hard drive periodically | By cycle | It is recommended to upgrade the SSD or replace the mechanical hard drive periodically |
| Replace the battery prompt prompted by the alarm (KSD/RDC related data) | According to the manufacturer's manual cycle | Replace the battery prompt prompted by the alarm (KSD/RDC related data) |
| 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 KR C4 smallsize-2
We are a third-party robot technical service provider. For the KR C4 smallsize-2 we offer the following eight services, ordered by how often they are actually needed for this model:
- Maintenance and repair: on-site diagnosis, board-level repair and annual maintenance contracts for the KR C4 smallsize-2 — brand-specific items such as periodic system image backups (fast recovery from disk failure on the Windows-based architecture) are performed per our SOPs; same-day response within Sichuan and Chongqing.
- Second-hand and inventory robot sales: large numbers are retired from the automotive industry, so the used KRC2/KRC4 market is active; the KR C2 has long been discontinued, so confirm spare-parts channels before buying; in-stock KR C4 smallsize-2 or equivalent models come with a full-function inspection report and a 12-month warranty.
- Sales of new industrial robots: When adding new production lines or replacing batches, we conduct cross-brand selection comparisons based on process requirements (including models of the same level as KUKA), and provide configuration and pricing plans.
- Applied technology services: process programming, path optimization, cycle-time tuning and changeover recipe management for the KR C4 smallsize-2, commissioned specifically for handling, assembly and general automation.
- Research and development of automation equipment: Custom fixture ends, peripheral tooling, and safety fences for KR C4 smallsize-2, with interfaces designed according to KUKA flange and IO standards.
- Robot rental: for short-term capacity needs or process validation, you can rent an in-stock KR C4 smallsize-2-class model, with transport, installation and commissioning included; rental terms are flexible and the unit can be purchased at the end of the lease.
Common issues with this device
Is it easy to find spare parts for the KR C4 smallsize-2?
KUKA: Spare parts channels for this generation are 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 configure consumables for system image periodic backup (hard drive failures can be quickly restored under Windows architecture) according to the annual maintenance contract.
With a nominal load of X kg, 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 KR C4 smallsize-2 worth buying?
The automotive industry retires a large volume of robots, so KRC2/KRC4 used units circulate actively; the KR C2 has long been discontinued - confirm spare-parts channels before purchasing. 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.
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