Cobots in mid-size manufacturing: economics and realistic expectations
What a manufacturing company executive should know before considering collaborative robots as an automation tool.
Collaborative robots - cobots - have become a visible topic at manufacturing trade shows over the last two to three years. The main argument sounds compelling: unlike traditional industrial robots, cobots can work alongside people without protective fencing, cost significantly less, are easier to program and can be retasked more quickly.
For mid-size manufacturers who cannot afford a full automated line, this sounds like a genuine opportunity. I think it is indeed an opportunity - but with specific limitations that are important to understand in advance.
What cobots do well
Cobots handle tasks that combine several characteristics:
- Repeatability: the same movements, the same sequence.
- Moderate precision: not requiring the sub-millimetre accuracy of industrial robots.
- Light loads: most cobots are rated for 3 to 10 kg.
- Limited speed: safe operation alongside people means reduced speed.
Typical applications: feeding blanks to a machine, assembling simple components, packaging uniform products, quality checks against defined parameters, applying adhesive or sealant along a programmed path.
Where expectations diverge from reality
The first area of divergence is speed. Cobots work more slowly than traditional industrial robots precisely because that is the condition for safe proximity to people. For tasks where throughput is critical, this can be a significant constraint.
The second is programming during changeovers. Cobots are genuinely easier to program than traditional robots. But "easier" does not mean "easy". Retasking to a new job still takes time and a person with the right skills. If the manufacturing facility changes its product range frequently - it is worth making a realistic assessment of who will do these changeovers and how quickly.
The third is integration into the existing process. A cobot is not a standalone tool that you set next to a conveyor. It is part of a production process that needs to be coordinated with the flow, parts feeding logistics, the quality control system and safety rules.
How to think about the economics
The cost of cobots starts at roughly 20 to 25 thousand dollars for an installation with basic tooling. This is significantly cheaper than traditional industrial robots, but it is not the full cost of deployment.
To that you need to add:
- integration into the production process and programming for the specific task;
- operator training;
- possible changes to the workspace;
- maintenance.
The payback period depends on the specific task. For an operation performed by one operator on one shift, which a cobot can fully or partially replace, the calculation is relatively straightforward. For tasks with more complex integration - a separate analysis is needed.
Questions before a pilot
If you are considering cobots in your facility:
- What specific operation do we want to automate - and why that one?
- How often does the product range change at this workstation?
- Is there someone in the team who will take ownership of programming and maintenance?
- How will the cobot fit into the existing flow - what needs to change around it?
- What is a realistic payback calculation under conservative assumptions?
A cobot is not a silver bullet, and not a toy. It is a working tool with a specific area of application. Companies that deploy one for a specific task with clear expectations generally get real results.