The most common confusion in industrial robotics
With the rise of cobots (collaborative robots) over the past few years, a frequent misconception has emerged: that cobots are simply cheaper, easier-to-programme robots, and therefore always the best choice. The reality is more nuanced: cobots and industrial robots are tools with very different characteristics and application contexts, and choosing the wrong one for an application can lead to a solution that neither works well nor is economically justified.
What is a collaborative robot (cobot)?
A cobot is a robot designed to operate alongside people without physical safety fencing, thanks to force and contact detection systems, controlled speeds, and a design with no sharp edges or pinch points. The reference standard is ISO/TS 15066, which defines four collaboration modes: safety-rated monitored stop, hand guiding, speed and separation monitoring, and power and force limiting.
The main manufacturers are Universal Robots (UR3e, UR5e, UR10e, UR16e, UR20, UR30), FANUC CRX, ABB GoFa and YuMi, Doosan Robotics and Techman Robot. Payloads range from 3 kg to 35 kg, and reach from approximately 500 mm to 1,750 mm.
What is a traditional industrial robot?
An industrial robot is a reprogrammable automatic manipulator that operates autonomously, typically inside a fenced safety cell or behind safety barriers (light curtains, laser scanners, perimeter fencing). It runs at high speed and with heavy payloads, without the force limiters of cobots. The leading manufacturers are FANUC, ABB, KUKA, Yaskawa Motoman and Kawasaki. Payloads range from 3 kg up to 2,300 kg, and tip speeds can exceed 10 m/s.
Technical comparison: cobot vs industrial robot
| Feature | Cobot | Industrial robot |
|---|---|---|
| Safety | Operates without fencing (ISO/TS 15066) | Requires fencing or safety barriers |
| Speed | Limited (typ. 250-1,500 mm/s) | High (up to 10,000 mm/s) |
| Payload | 3 – 35 kg | 3 – 2,300 kg |
| Repeatability | ±0.02 – ±0.1 mm | ±0.01 – ±0.05 mm |
| Programming | Intuitive (hand guiding, apps) | Requires specialised training |
| Flexibility | High (easy repositioning) | Medium (dedicated cell) |
| Initial investment | €25,000 – €150,000 (full cell) | €60,000 – €500,000 (full cell) |
| Integration time | 2 – 12 weeks | 3 – 24 months |
| Maintenance | Low (simpler design) | Moderate (greater complexity) |
When to choose a cobot?
- When space is limited: there's no room to install a full fenced cell.
- When the process involves human-robot interaction: machine tending where the operator also intervenes, in-line screwdriving, assisted verification.
- When production is small-batch and high-variety: the cobot is easily reprogrammed for different references.
- When the payload is under 20 kg and speed isn't critical: simple pick & place, medium-precision assembly, palletising of light boxes.
- When the maintenance team has no robotics experience: cobots are more accessible to teams without specialised robotics training.
- When you want to move the robot between workstations: on a wheeled pedestal, the cobot can be used for different tasks as demand requires.
When to choose an industrial robot?
- When speed is critical: sub-3-second cycles, high-cadence lines, high-speed picking.
- When payload exceeds 20-30 kg: pallet handling, casting parts, large-format components.
- When precision is extreme: precision welding, machining, aerospace or medical applications.
- When the process is 100% automated with no human intervention: if there are no people in the cell, the cobot's speed limitation provides no benefit.
- When the process requires specific applications: arc welding, painting, hot sealing — aggressive processes where human collaboration is irrelevant.
The myth of "the cobot is always cheaper"
The cobot itself can be cheaper than an industrial robot of equivalent performance, but the full cell often isn't. A cobot operating in a truly collaborative mode (without fencing) requires a rigorous ISO/TS 15066 risk assessment, which may conclude that for the specific application the robot's speed or force has to be reduced so much that throughput becomes unacceptable. In that case, it is more honest to install a small fenced industrial robot than a cobot running at a third of its rated speed.
At Bluemation we assess each application independently to recommend the most suitable robotic solution — cobot or industrial robot — with no brand or technology bias. Contact our team.