Technical guidance by Oxford Industrial Automation. Updated 25 August 2026.
The short answer
Choose a SCARA robot when the task is mainly horizontal pick, transfer or assembly with a controlled vertical approach. Choose a six-axis robot when the tool must rotate through complex orientations, travel around fixtures or enter machines from varied angles.
That first filter is not a final selection. Payload, reach, centre of gravity, inertia, cycle time, footprint, mounting, protection and the wider cell still need to be checked.
| Decision factor | SCARA robot | Six-axis robot |
|---|---|---|
| Core motion | Fast movement in a horizontal plane with vertical insertion | Flexible movement and orientation through three-dimensional space |
| Strong use cases | Pick and place, assembly, dispensing and inspection | Machine tending, complex handling, assembly and process paths |
| Tool orientation | Focused and architecture-dependent | Full multi-axis orientation within model limits |
| Work-area fit | Compact for suitable planar tasks | Broader envelope, but paths and clearances need modelling |
| Integration question | Is every task point reachable with the required vertical approach? | Can every pose be reached without collision or unsuitable joint positions? |
Use the product path as the deciding evidence
Map every pick and place pose
Include approach, grip, process, release and safe recovery positions.
Add the real tool
Model gripper size, mass, centre of gravity, services and any tool changer.
Include surrounding equipment
Account for fixtures, guarding, conveyors, machines and operator access.
Time the complete sequence
Include sensing, grip confirmation, machine handshakes and product availability.
When neither is automatically right
Very high-speed overhead picking may point towards a delta or parallel robot. Long-reach layer building may suit a dedicated palletising architecture. Start with the task and compare the full cell, not a single brochure specification.