Products rarely arrive at the pitch you need to place them. Pouches come down the conveyor shoulder to shoulder, but the carton wants them spaced into neat rows, and closing that gap is exactly what a spreader end of arm tool does. This application story covers a spreader tool we designed and 3D printed for a food packaging line, picking four product towers at once and re-pitching them on the fly, with the whole tool weighing less than 4 kg.
What Is a Spreader End of Arm Tool?
A spreader end of arm tool is a pick and place tool that changes the spacing, called pitch, between products while the robot moves from pick to place. Instead of picking one product at a time or locking the line to a single spacing, the spreader picks several products at conveyor pitch and releases them at carton pitch in one motion. It is one of the highest impact upgrades in pick and place automation, because it multiplies throughput without a faster robot.
The Application: Four Towers, 250 Grams Each, One Motion
In this application the tool picks product towers weighing 250 grams each using suction cups, four towers per cycle. The tool offers two settings with a quick changeover between them: a 4 position mode and a 2 position mode, so the same tool serves two different pack patterns without leaving the robot. The spreading action rides on a smooth rolling mechanism with no hard stops, which keeps the motion gentle on the product and quiet on the line.
How the Spreading Mechanism Works
The four suction towers ride on a low friction linear rail and are linked so that a single actuation moves every tower in sync. As the robot travels from pick to place, the linkage rolls the towers outward from conveyor pitch to carton pitch, fully mechanically, with no extra axis to program and nothing for the controller to manage. Smoothness is designed in: the absence of hard stops means no impact loads on the product, no shock into the robot wrist, and no banging on the line. Switching between the 4 position and 2 position settings is a quick adjustment on the tool rather than a tool swap, and the animation below shows a complete spread cycle.
Key Features
- Under 4 kg total weight, leaving nearly the entire robot payload for the product
- Two settings, 4 positions and 2 positions, with a quick changeover feature between them
- Smooth rolling action with no hard stops for gentle, low noise operation
- Quick connect suction cup and ejector replacement, keeping maintenance to seconds
- Customizable to product size, number of parts picked, and pitch
The Quick Release End
The tool is equipped with a quick disconnect that allows differently configured suction cup arrangements to be attached. When the product changes, the operator swaps the cup arrangement rather than the tool, and production continues. It is the same philosophy behind our Manual Tool Changers, applied at the cup level.
Why 3D Printing Makes It Possible
A spreading mechanism with articulated towers, integrated air routing, and custom pitch geometry would be heavy and expensive as a machined assembly. Printed in nylon on our SLS systems, the same mechanism comes in under 4 kg, with the linkages, mounts, and air channels consolidated into far fewer parts. Because the geometry is printed, the tool is customized to the product size, the number of parts picked, and the pitch, and a revision for a new product is a new print rather than a new machining program. Browse more of our EOAT grippers or the full lineup of robot end of arm tooling.
Where Spreader Tools Earn Their Keep
Any line that picks at one pitch and places at another is a candidate. Pouches and flow wrapped snacks coming off the wrapper into cartons, bottles collated from single file into tray patterns, bakery items moving from oven spacing to pack spacing, and cosmetics loaded into gift trays all share the same geometry problem. A four position spreader turns one robot cycle into four placed products, which is often the difference between running one robot or two on the same line. When the product is porous or delicate, the same spreading concept pairs with the foam faces of our Area Surface Grippers instead of individual suction cups, and for round containers the towers can carry External Bottle Gripper profiles.
Spreader Tool Questions
What does a spreader end of arm tool do?
It changes the spacing between picked products while the robot moves, so items picked at conveyor pitch can be placed at carton or tray pitch in a single motion.
How many products can a spreader tool pick at once?
This tool picks four towers per cycle in its 4 position mode and switches to a 2 position mode with a quick changeover. Pick count and pitch are customized per application.
Can the tool adapt when our product changes?
Yes. The quick release end accepts differently configured suction cup arrangements, and because the tool is 3D printed, a redesigned version for a new product ships in days.
Have a Variable Pitch Application?
Tell us about your robot, your product, and your target cycle time, our team will recommend a tooling design that fits your payload, changeover, and budget.
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