We present a brief overview of existing parallel kinematic robots (PKMs) and look into how workspace singularities and joint limits have reduced their applicability to small workspaces and niched applications.
This is compared with the industry’s demand to use robots for both additive and subtractive manufacturing and how existing accuracy and rigidity have shown not to be sufficient for good part quality.
The fundamental differences between traditional robots and PKMs are explained in the context of the new potentials they bring. The Cognibotics parallel kinematic robot concept based on eight links is explained, and we show how this solution overcomes both the limitations of existing PKMs and the shortcomings of traditional industrial robots. We explain how the solution uses 6 links, arranged to optimize the cartesian workspace size and rigidity, combined with two additional links to provide a large orientational workspace for 5 and 6 axis processes with a need for speed, accuracy, and rigidity.
We also present an example of a prototype robot installation based on this concept which provides great properties for a hybrid manufacturing solution, capable of both additive and subtractive manufacturing.
- Explain how parallel kinematic robots can achieve higher performance than traditional robots.
- Understand performance limitations of articulated industrial robots on today’s market.
- Identify new manufacturing processes which can be improved with the use of parallel kinematic robots.