Delta and SCARA robots are both used for pick and place, but their mechanical structures lead to very different strengths.
Speed and inertia
A delta robot moves three lightweight parallel arms driven by motors fixed to the base. The moving mass is small, so acceleration is high and pick rates of 120 to 150 per minute are common. A SCARA robot carries its motors on the arm, which increases inertia and limits the practical pick rate to roughly 60 to 100 per minute.
Workspace shape
Delta robots cover a cylindrical volume below the mounting frame, which suits a wide belt conveyor. SCARA robots cover a ring-shaped area and can reach behind obstacles, which suits assembly stations with fixtures.
- Delta: wide belt picking, top-down placement, no lateral reach
- SCARA: assembly, screwing, insertion, lateral reach around fixtures
Hygienic design
Delta robots are mounted above the product zone with a sealed base plate, which makes washdown design simpler. This is one reason the food and pharmaceutical industries prefer delta architecture for primary picking.
Cost per pick
For pure sorting tasks above 100 picks per minute, a delta robot usually gives a lower cost per pick. For tasks that need assembly force or lateral reach, a SCARA or a six-axis robot is the practical choice regardless of price.
If you are not sure which architecture fits, send your product weight, size, belt width and target output. We will recommend the configuration with a cycle time calculation.
