Run the Arm-Is-a-Third Test
Vendors publish arm prices; integrators quote cells. Those two numbers describe different things, and comparing one against the other is the most common budgeting error in a first automation project.
The Bot Scout arm-is-a-third test says: before accepting any arm price as the project cost, list the end effector, fixtures, sensors, controls integration, guarding and safety assessment, programming, training, spare parts, and commissioning downtime. In most first projects the arm itself is closer to a third of the total than to the whole.
A low arm price can even raise total cost. An arm with limited reach needs more fixturing to bring the part to it; an arm with no local programming support needs a contractor for every part change. That is the support-radius logic applied to capital equipment.
| Cost line | Usually quoted by | Frequently omitted | Why it matters |
|---|---|---|---|
| Arm and controller | Robot vendor | Software licences | The visible headline number |
| End effector and fixtures | Integrator | Second gripper for a part change | Decides whether the cell works at all |
| Guarding and safety assessment | Integrator or specialist | Reassessment after a part change | A legal obligation, not an option |
| Controls integration | Integrator | Interfaces to existing machines | Sets the project schedule |
| Training and programming | Vendor or integrator | Retraining after staff turnover | Determines who can change the job |
| Commissioning downtime | Nobody | Lost production during install | Often the largest hidden line |
How to Compare Quotes Fairly
Require every proposal to quote the same scope: the same task, part, cycle time, quality target, changeover requirement, and exception handling. Without that, the cheapest quote is usually the one that scoped the least — the specification discipline in the manufacturing robots guide.
Ask each vendor what is excluded, in writing. Exclusions are where quotes differ, and they are rarely volunteered.
Builders including Universal Robots, ABB Robotics, and FANUC publish product families across several price bands, so the same supplier may have a cheaper arm that produces a more expensive cell.
- Write one scope document and send it to every vendor unchanged.
- Require a written exclusions list from each proposal.
- Include commissioning downtime in the payback calculation.
- Budget a second gripper or fixture for the next part.
- Price software licences and programming support separately.
Used Arms and the Second-Year Budget
A used arm can be a reasonable purchase for a stable, well-understood task, and a poor one where support and documentation matter — the trade-offs are in the used industrial robots guide.
The line most budgets omit entirely is year two: re-teaching after a part change, wear items, controller battery and backup management, and retraining after turnover. A payback model that stops at year one is not a model.
If the automation case itself is unproven, price a low-cost process redesign as a competing option first, as set out in the robotic automation guide.
Bottom Line
Robot arm price is the smallest reliable number in an automation budget. Quote the complete cell against one scope document, demand written exclusions, and budget the second year.
Send one scope document to every vendor and require a written exclusions list with each quote.
FAQs
How much does a robot arm cost?
Published arm prices vary widely by payload and reach, but the arm is typically a minority of a working cell's cost once tooling, integration, safety, training, and commissioning are included.
Why are robot quotes so different from each other?
Usually because they scoped different things. Send one scope document to every vendor and require a written exclusions list, since exclusions are where quotes actually differ.
What is the most commonly missed cost in a robot project?
Commissioning downtime and the second-year costs of re-teaching after part changes, wear items, and retraining after staff turnover.
Is a cheaper robot arm a false economy?
It can be. An arm with limited reach needs more fixturing, and one with no local programming support needs a contractor for every part change, both of which raise total cost.