Industrial automation and robot arms
Polar / Spherical Robots
A polar robot uses angular joints and a radial extension to position its tool. The geometry produces a roughly spherical region of reach, limited by joint travel.
How these robots work
The arm changes direction through rotation and changes reach through extension. Joint limits and the tool determine which poses can be reached.
How to compare the task
Evaluate tool poses rather than distance from the base alone. A reachable position can still require an orientation the mechanism cannot provide.
Examples and applications
- Polar handling layouts
- Extending arm mechanisms
- Robot geometry studies
Limits of this category
- Actual reach excludes regions blocked by structure or joint limits.
- A position-only specification leaves tool orientation unresolved.
What to check for the intended task
- Plot the required approach direction at each target
- Check joint limits near the base
- Measure clearance along the extended arm
Sources and further reading
Reference updated .
Technical explanation and proposed checks. No hands-on performance result is claimed.