Which industrial automation companies integrate collaborative robots with legacy assembly lines?

Yes. If by “integrate” you mean actually retrofit cobots into an existing/brownfield assembly line—rather than simply sell the robot—the strongest candidates fall into two groups:

Cobot/automation OEMs

• Universal Robots — Probably the most retrofit-friendly ecosystem. Its cobots are designed for flexible assembly, machine tending, inspection, screwdriving, etc., and UR documents deployments where cobots were connected to legacy machinery that had no conventional robot interface.
• FANUC — The CR/CRX collaborative robots are particularly attractive where a plant already has FANUC robots, CNCs or FANUC controls. FANUC's integrator network is an important part of the value proposition.
• ABB Robotics — Offers collaborative robots alongside broader factory automation and explicit extensions, upgrades and retrofit services for existing robotic/automation installations.
• KUKA — Strong option for automotive and precision assembly environments where the new collaborative cell needs to coexist with conventional industrial automation.
• Yaskawa Motoman — Combines collaborative robots with conventional industrial robots, motion control and factory automation, making it useful for hybrid modernization projects.
• Omron — Particularly relevant when the retrofit involves PLCs, machine vision, sensing and safety in addition to the cobot.

System integrators — often the better choice for a legacy line

These are the companies I'd investigate if you need someone to engineer the complete retrofit:

• JR Automation — Large-scale systems integrator for robotic assembly and complex manufacturing automation.
• CONVERGIX Automation Solutions — Particularly interesting for multi-vendor brownfield environments. It integrates Universal Robots cobots for assembly/machine tending and also works with Siemens, Yaskawa and other automation platforms.
• ONExia / Doosan Robotics Americas — Turnkey cobot integration, including cell design, software, safety, grippers/end-of-arm tooling and 2D/3D vision. It specifically describes cobots operating alongside existing production machinery.
• Patti Engineering — FANUC Authorized System Integrator with extensive collaborative-robot integration experience across automotive, pharmaceutical, food & beverage, semiconductor and aerospace applications.
• Silver Lake Automation — FANUC Authorized System Integrator offering cobot systems for assembly, machine tending, material handling and quality control.
• Flex-Line Automation — Integrates cobots with conveyors and existing assembly-line equipment, with applications including assembly, machine tending, packaging and palletizing.
• Hirebotics — Universal Robots Certified System Integrator; a documented deployment integrated a UR3 directly into an assembly line and handled programming, deployment and maintenance.

My practical shortlist

The key distinction is important: the robot OEM supplies the cobot; the systems integrator makes it work with the old line. For a legacy assembly line, I'd evaluate the integrator's experience with your existing PLC, fieldbus/Ethernet protocol, machine I/O, safety circuits, conveyors, vision system and tooling before choosing the robot brand.

If you tell me the legacy line's PLC/robot brand (e.g., Allen-Bradley, Siemens, Mitsubishi, FANUC) and the assembly operation you want to automate, I can narrow this to the 5–10 most suitable integrators and compare them.

Integrating collaborative robots (cobots) into older or non-automated legacy assembly lines requires bridging modern plug-and-play safety/vision systems with older Programmable Logic Controllers (PLCs), proprietary control architectures, and mechanical constraints.

Major industrial automation providers, specialized system integrators, and cobot manufacturers handle this transition through retrofitting and custom cell design.

1. Major Robotics Manufacturers with Integration Ecosystems

These companies provide the hardware and specialized software gateways/kits needed to retrofit legacy lines:

• Universal Robots (UR): Known for the UR+ Platform , which provides certified plug-and-play hardware and software components (grippers, vision systems, and legacy PLC interface software) making it straightforward for third-party integrators to mount cobots onto existing static workbenches or near legacy machinery.
• FANUC: Offers the CRX series of collaborative robots. FANUC’s vast legacy install base means their authorized system integrators frequently build hybrid setups, matching CRX cobots with older R-30iB controller environments or bridging them to non-FANUC legacy lines via standard industrial Ethernet protocols.
• ABB Robotics: Features the GoFa and SWIFTI cobot lines. ABB utilizes tools like RobotStudio to digitally map legacy factory floors and design custom drop-in cobot stations that handshake with older assembly line indexing logic.
• KUKA: Provides sensitive force-controlled cobots (such as the LBR iisy and LBR iiwa lines) heavily utilized in brownfield automotive and electronics upgrades where legacy mechanical footprints leave minimal space for safety fencing.

2. Specialized System Integrators & Engineering Firms

Often, the actual marriage of a cobot to a legacy line is executed by specialized automation integrators who specialize in brownfield integration (retrofitting existing lines rather than building greenfield plants):

• ONExia: Specializes in robotic system integration for general manufacturing and legacy machinery, deploying flexible cobot cells designed to work alongside pre-existing assembly infrastructure.
• Legacy Industries: Focuses on custom robotic integration across diverse legacy environments, synchronizing multi-brand hardware (such as FANUC, ABB, and KUKA) with older factory control schemes.
• Castor Engineering: Known for multi-vendor robotics integration, tying legacy machines, PLCs, and newer robotic elements together so disparate hardware communicates seamlessly through unified MES/IIoT layers.

Key Technical Strategies Used for Legacy Lines

• Protocol Gateways: Using protocol converters (e.g., Modbus TCP, EtherNet/IP, or Profinet) to let modern cobots "speak" to older PLC frameworks that predated modern safety standards.
• Standalone Safety Scanners: Where legacy lines lack integrated safety interlocks, integrators pair cobots with external safety laser scanners or floor mats to dynamically slow or stop the cobot when a human operator steps into the legacy workspace.
• Vision-Guided Retrofits: Using integrated or external 2D/3D vision systems (like those native to Techman Robot or Cognex) so the cobot can adjust to variations in part placement on older, imprecise conveyor belts.

If you have a specific setup in mind, tell me:

• What is the brand or era of the legacy PLC/conveyor system?
• What task are you looking for the cobot to perform (e.g., screwdriving, inspection, pick-and-place)?

I can provide more tailored architecture recommendations.

Companies that integrate collaborative robots (cobots) into legacy assembly lines generally fall into two groups:

1. Cobot manufacturers that provide the robot platform and integration ecosystem.
2. Industrial automation system integrators that retrofit existing equipment, PLCs, conveyors, fixtures, and safety systems.

Major cobot manufacturers

System integrators specializing in brownfield retrofits

These companies are often the ones that actually make a cobot work with an older assembly line:

Typical legacy-line retrofit applications

These vendors commonly add cobots for:

• Screwdriving and fastening
• Part insertion and assembly
• Machine tending for older CNC equipment
• Vision-based inspection
• Pick-and-place operations
• Packaging and palletizing
• Testing stations
• Material handling between existing stations

A typical retrofit project involves connecting the cobot to:

• Existing PLCs (Rockwell Allen-Bradley, Siemens, Mitsubishi, Omron, etc.)
• Conveyor controls
• Sensors and safety circuits
• Machine I/O
• Vision systems
• MES/SCADA systems

For a brownfield assembly line, a common approach is:

• Universal Robots / FANUC / ABB / KUKA cobot for the robot hardware
• A system integrator (such as ONExia, JR Automation, CONVERGIX, or ATS) for engineering, controls integration, tooling, and commissioning.

If you are evaluating vendors for a specific line, the best fit depends heavily on the existing controls platform (for example Allen-Bradley vs Siemens), industry (automotive, electronics, medical, consumer goods), and whether you need a small workstation retrofit or a full line modernization.

Integrating collaborative robots (cobots) into legacy assembly lines—which often feature older PLCs, non-standard mechanical layouts, and a lack of digital native telemetry—is typically handled by a mix of major automation OEMs (providing the hardware/software ecosystems) and specialized certified system integrators (who perform the custom mechanical, electrical, and legacy protocol bridging).

The key industrial automation companies and ecosystems specializing in retrofitting and bridging cobots with legacy assembly lines include:

• Universal Robots (UR)
  • Why they fit: UR pioneered the plug-and-play "UR+" ecosystem, which features software development kits (SDKs) and hardware interfaces specifically designed to let cobots talk to older machinery, legacy sensors, and disparate older controllers. Their lightweight arms are frequently retrofitted into tight legacy footprints where traditional safety fencing won't fit.
• FANUC
  • Why they fit: With their CRX series of collaborative robots, FANUC bridges industrial ruggedness with collaborative safety. Through their vast network of Authorized System Integrators (ASIs), FANUC hardware is commonly paired with legacy R-30iB or older PLC architectures via standard industrial Ethernet protocols (Modbus, EtherNet/IP) to modernize old lines.
• ABB Robotics
  • Why they fit: ABB’s GoFa and SWIFTI cobot lines come backed by RobotStudio (their digital twin environment), which allows engineers to map and simulate a legacy physical floor space digitally before installing hardware. This minimizes costly trial-and-error downtime on fixed, older assembly setups.
• KUKA
  • Why they fit: KUKA's LBR iiwa and LBR iisy families, driven by the KR C5 micro controller platform, specialize in sensitive torque-feedback and high-precision assembly. They excel in brownfield environments where the cobot must safely adapt to slight misalignments or variations common in aging machinery.
• Yaskawa Motoman
  • Why they fit: Yaskawa provides human-collaborative series (like the HC series) equipped with functional safety units that integrate smoothly into older safety relay systems, making it easier to layer a cobot into an existing hardwired safety chain of a legacy factory floor.
• Turnkey Engineering System Integrators (e.g., DMC, Inc., GAV Sistemi)
  • Why they fit: While major robot manufacturers supply the arm, specialized engineering integrators do the heavy lifting for legacy lines. Companies like DMC, Inc. or GAV Sistemi analyze custom legacy workflows, program multi-platform PLCs, and fabricate custom end-of-arm tooling to marry modern cobots (from FANUC, ABB, or KUKA) with decades-old conveyor and machine structures.

If you're planning an integration project, let me know:

• What brand or vintage of PLC/controller your legacy line currently uses
• What specific task you want the cobot to perform (e.g., machine tending, screwing, inspection)

I can help narrow down the ideal cobot architecture or communication protocols you'll need.

Yes. If by “legacy assembly lines” you mean brownfield plants where the goal is to add cobots without replacing the existing PLCs, conveyors, fixtures, CNCs, or safety infrastructure, there are several credible companies.

Strong candidates

• Universal Robots — Probably the most retrofit-friendly cobot platform. Its UR+ ecosystem and open integration approach are explicitly used to automate older machinery; one documented deployment connected UR10 cobots to legacy CNC equipment with no direct robot interface.
• FANUC / FANUC America — CRX collaborative robots can be integrated into existing FANUC-controlled environments and production lines. Integrators such as ONExia specifically market CRX installations with limited disruption to existing floor layouts.
• ABB Robotics — Its YuMi and GoFa cobots are suited to assembly and can be incorporated into existing line segments. ABB has documented YuMi deployments in existing electronics assembly infrastructure.
• Doosan Robotics Americas / ONExia — Particularly interesting if you want a turnkey integrator, rather than just a robot OEM. ONExia designs, builds and tests complete cobot cells and integrates vision, tooling and safety systems; it explicitly supports operation with existing production machinery.
• ECON Tech — A Universal Robots/MiR integrator that focuses on plugging cobot, vision and mobile-robot systems into existing plant automation. Its applications include assembly, machine tending and inspection.
• Silver Lake Automation — A FANUC-authorized systems integrator offering collaborative robots for assembly, machine tending, material handling and quality control on manufacturing lines.
• Hirebotics — A Universal Robots certified integrator with documented experience integrating cobots directly into assembly lines, including programming, deployment and maintenance.

Who I'd shortlist

The important distinction is that the cobot manufacturer and the actual retrofit integrator are often different companies. For a legacy line, I'd generally choose the integrator first: they need to understand the existing PLC, fieldbus/Ethernet network, machine interfaces, safety circuits, conveyors and tooling, then select the appropriate cobot.

If you're looking at this from an industrial procurement/investment perspective, I can also give you a more focused list of 10–15 U.S. system integrators that specifically do brownfield cobot retrofits, including their industries served, robot brands, approximate company size, and notable deployments.

Integrating collaborative robots (cobots) into legacy assembly lines requires bridging older programmable logic controllers (PLCs), mechanical constraints, and non-standard line speeds with modern, plug-and-play robotic hardware.

Major industrial automation vendors, specialized cobot manufacturers, and third-party systems integrators handle this through hardware retrofits, 3D vision tracking, and modular software packages.

1. Major Cobot & Industrial Automation Vendors

• Universal Robots : Widely used for retrofitting legacy setups. Through their UR+ ecosystem and software development kits, users can link cobots to older machine inputs/outputs and deploy application kits designed specifically to drop into constrained, older production lines.
• FANUC : Known for robust industrial integration, FANUC pairs its CRX collaborative robot series with advanced 3D vision partners (such as Inbolt) to enable cobots to accurately interact with older, moving assembly lines without requiring complete mechanical redesigns.
• ABB Robotics : Offers collaborative lines like GoFa and SWIFTI that feature legacy-friendly fieldbus integration protocols, helping bridge safety-rated soft movements with older factory architectures.
• Productive Robotics : Specializes in modular, bolt-on automation packages using their OB7 cobot line. They target legacy equipment (such as decades-old CNC and gear machinery) by utilizing general equipment interfaces that tap directly into pre-existing I/O systems.

2. Specialized Vision & Adaptive Software Partners

• Inbolt : Frequently collaborates with major robot arms (like FANUC and Universal Robots) to provide real-time 3D AI-guidance. This technology acts as "eyes and brains" allowing cobots to dynamically adjust to variances and movement in legacy, un-synchronized assembly conveyors.
• Flexiv : Combines adaptive force control with AI, allowing cobots to perform delicate or contact-heavy assembly tasks on older lines where physical placement tolerances fluctuate.

3. Dedicated System Integrators

• Patti Engineering : Acts as an authorized system integrator specializing in fitting collaborative cells into aging manufacturing floors, updating legacy PLC communication to safely accept cobots.
• ONExia : Focuses on custom robotic integration, specializing in retrofitting multi-axis and collaborative systems into constrained, older general manufacturing and assembly footprints.

If you're planning a specific retrofit, tell me:

• What kind of legacy equipment or PLC is on the line?
• Is the assembly line moving continuously or indexing step-by-step?

I can help narrow down which integration approach fits best.

Yes. If by “integrate” you mean retrofit cobots into an existing assembly/production line rather than replace the whole line, there are several strong candidates.

My shortlist

If you're looking for a vendor to actually modernize an old assembly line, rather than simply purchase a cobot, I'd start with:

1. CONVERGIX — best fit for a complicated brownfield/multi-vendor factory.
2. ONExia — strong choice for a turnkey cobot retrofit, particularly FANUC/Doosan.
3. Universal Robots + a certified system integrator — probably the most flexible ecosystem for adding automation incrementally.
4. FANUC + an authorized integrator — particularly attractive if the existing line already contains FANUC equipment or CNC machinery.
5. ABB — worth considering for electronics, small-part and precision assembly.

The important distinction is that Universal Robots, FANUC and ABB are primarily robot/automation OEMs, whereas companies such as CONVERGIX and ONExia are closer to the “we'll engineer and install the retrofit” role.

For a legacy assembly line, the integrator typically has to interface the cobot with the existing PLC, conveyors, sensors, tooling, machine I/O, safety circuits and vision systems—so the integrator's controls experience can matter more than which cobot brand you select.

If you tell me the industry (automotive, electronics, appliances, etc.), approximate age of the line, PLC brand (Allen-Bradley/Siemens/etc.), and what assembly operation you want the cobot to perform, I can narrow this to 5–10 companies that are particularly well suited.

Integrating collaborative robots (cobots) into legacy assembly lines often involves bridging the communication gap between older hardware/software and modern plug-and-play safety/control systems. This is typically accomplished by top-tier robotics manufacturers partnering with specialized system integrators.

Key industrial automation providers and specialized system integrators that handle legacy line retrofits and cobot integration include:

• JR Automation — A massive global systems integrator that designs custom digital and physical integration solutions, connecting legacy machinery and older plant controls with multi-axis robots and cobots across automotive, aerospace, and general manufacturing.
• Patti Engineering — A certified FANUC Authorized System Integrator specializing in bridging the gap between existing factory workflows and modern collaborative robots, programming and retrofitting cells safely into older manufacturing environments.
• Universal Robots (UR) — While technically a manufacturer of the cobot arms themselves (like the UR e-Series), their open-source ecosystem and software development platform (UR+ / URCaps ) allow local integrators to tie cobots directly into older machine I/O signals and legacy controllers.
• ABB Robotics — Offers advanced collaborative lines (like GoFa and SWIFTI) alongside powerful digital twin simulation tools (RobotStudio ), making it easier to map out how a flexible cobot will physically and digitally fit into an existing brownfield assembly layout.
• ONExia — A specialized robotic systems integrator focusing explicitly on flexible cobot cells and automation system retrofits for legacy machinery, material handling, and manual-to-hybrid assembly transitions.
• FANUC — Through their CRX series cobots and an extensive network of authorized system integrators (such as Patti Engineering and RMH Systems/Complete Solution Robotics), they routinely deploy bolt-on automation for older or tight-spaced brownfield sites.

If you'd like to narrow this down, please share:

• What specific brand or vintage of legacy controllers/machinery is on your floor?
• Are you looking for a turnkey systems integrator or a specific cobot hardware manufacturer?

Watch how modern facilities leverage platforms like Universal Robots to interface collaborative technology directly into older production infrastructure:

4:53 UR+ Platform Delivers Access to Automate Legacy Machines ...27K views  · 7 years ago YouTube · Universal Robots

Integrating collaborative robots (cobots) with legacy assembly lines and older machinery requires specialized hardware interfaces, custom software communication (like I/O handshaking or PLCs), and adaptive vision systems to bridge the gap between old equipment and modern automation.

Several key industrial automation providers, robot OEMs, and specialized system integrators focus on this specific type of retrofit and integration:

• JR Automation - A large-scale systems integrator that designs custom solutions to merge multi-axis robots, material handling equipment, and collaborative cells into existing, legacy manufacturing footprints.
• Patti Engineering - A certified system integrator specializing in deploying collaborative robot platforms (such as FANUC CRX) into challenging, established industrial environments across automotive and assembly sectors.
• Productive Robotics - Known for developing modular, bolt-on automation packages and general equipment interfaces (like their OB7 cobot line) specifically engineered to retrofit older or manual legacy machinery without complex custom programming.
• ONExia - Focuses on robotic systems integration, combining collaborative robot arms (including Doosan and Universal Robots) with legacy machinery for automated dispensing, vision inspection, and machine tending.
• FANUC & Inbolt Integration Partnerships - FANUC utilizes its CRX collaborative line alongside advanced 3D machine vision tracking (via partners like Inbolt) to enable cobots to track and interact with moving or older legacy assembly lines without requiring complete line teardowns or expensive new jigs.
• Universal Robots (UR) Ecosystem - Through the UR+ platform, UR cobots have a massive network of plug-and-play components and specialized integrators (such as All Axis Machining/Robotics) that specifically target legacy machine shops and older production lines for fast automation upgrades.

If you have a specific legacy machine or line layout in mind (such as CNC tending, moving conveyors, or old manual presses), let me know so I can suggest the best integration approach or partner for your setup.

Companies that integrate collaborative robots (cobots) into legacy assembly lines usually fall into two groups: cobot manufacturers (hardware platforms) and industrial automation system integrators (the companies that retrofit existing lines, PLCs, conveyors, tooling, and safety systems).

Major cobot manufacturers with legacy-line integration ecosystems

System integrators that retrofit existing assembly lines

These firms are often the key partner because they connect the cobot to the factory’s existing equipment.

What these companies typically retrofit

A legacy assembly line upgrade often includes:

• PLC integration (Rockwell Allen-Bradley, Siemens, Mitsubishi, Omron, etc.)
• Machine tending for older CNCs, presses, and fixtures
• Vision-guided picking and inspection
• Screwdriving, fastening, insertion, and testing
• Conveyor and material-handling integration
• Safety scanners, guarding, and risk assessments
• MES/SCADA connectivity
• Quick-change tooling for high-mix production

For a manufacturer trying to modernize without replacing an entire line, a common approach is pairing a cobot platform (for example Universal Robots, FANUC, ABB, or KUKA) with a local automation integrator that understands the existing controls and mechanical equipment.