How to Choose a Cobot Palletizer:
The 9-Point Buyer’s Checklist

A palletizing cell can look convincing in a demonstration and still be wrong for the production line that buys it. The usual problem is not the robot. It is an overlooked detail: a carton that bends under vacuum, a pallet that sits just outside the useful reach, a tall final layer, a speed target measured at the conveyor rather than at the pallet, or a product change that takes too long on a busy shift.

That is why the best buying process starts with the application. Before comparing robot brands or asking for prices, document what arrives at the pick point, what the finished pallet must look like, how quickly the line runs and how people move around the area. A well-written brief gives an integrator enough information to recommend a dependable cobot palletizer instead of making assumptions.

This checklist is designed for production managers, engineers and business owners evaluating automated palletizing systems. Use it during an internal site review, then attach the answers to your request for quotation.

1. Define Every Product the Palletizer Must Handle

Record the length, width, height and actual weight of every priority SKU. Do not specify only the most common carton. The heaviest product influences robot payload; the largest influences reach and collision clearance; the lightest or least rigid may be the hardest for a vacuum gripper to hold reliably.

Note the packaging material and condition as well. Corrugated boxes can be porous, glossy, taped, bowed or soft. Bags shift shape. Open trays may need support underneath. Pails and crates may offer handles or rims that suit mechanical gripping. If labels, barcodes or “this way up” markings must face a particular direction, add that to the specification.

2. Calculate the Real Lifted Payload

Robot payload is not the same as product weight. The arm must carry the product plus the complete end-of-arm tool, mounting hardware, hoses, valves and any sensors that move with it. If the gripper lifts two cartons at once, both belong in the calculation. A selection that sits at the edge of the robot’s capacity can restrict speed and usable reach.

Ask the supplier to confirm the payload calculation at the required reach and wrist orientation. The answer should be based on the chosen robot’s load data and the proposed tooling—not a simple subtraction from the catalogue payload.

3. Check Reach Across the Entire Pallet Pattern

A robot must reach more than the nearest edge of a pallet. It has to collect the product, clear the conveyor and surrounding equipment, place every corner position, rotate the pack where required and build the highest layer without entering a weak or awkward posture.

Provide pallet length and width, maximum loaded-pallet height, slip-sheet requirements, conveyor height and the exact proposed locations of the robot and pallets. For changing layouts, a configurable platform such as EasyPalletizer Flex can support different robot footprints, pallet sizes and pedestal arrangements. The final reach study should still be verified for the actual application.

4. Convert Line Output into an Honest Cycle-Time Target

“We make ten boxes a minute” is only the beginning. Tell the supplier whether products arrive at a steady interval or in bursts, how much accumulation is available, whether the robot may pick more than one item, and how long pallet changes interrupt production. Include short stops, rejected packs and normal variation—not only the best recorded minute.

The right acceptance test measures complete operation over a representative run. It should include picking, placing, layer changes, product orientation and any routine pallet or slip-sheet handling. If the required rate leaves no margin, discuss accumulation or process changes before ordering a larger robot by default.

5. Match the Gripper to the Packaging

The gripper is the part of the system that touches your product hundreds or thousands of times. Vacuum tooling is often effective for closed cartons with suitable surfaces. Mechanical clamps may suit crates, pails or packs that cannot hold vacuum. Fork-style support can help with open trays or flexible loads. Some production mixes need a combined tool or an automatic changeover.

Ask for a handling test with the least cooperative package, not the easiest one. Confirm what happens if a pick is incomplete, a carton seam leaks or two products arrive too close together. Recovery behaviour matters just as much as a successful demonstration cycle.

6. Specify Pallets, Patterns and Changeovers

List every pallet size and allowable pallet condition. State the required overhang or underhang, maximum stack height, number of layers, interlocked patterns, layer sheets and orientation rules. If customers use different pallet standards, include them all.

Then define a changeover target. Who selects the next recipe? Which adjustments are manual? Must the gripper change? How is the correct pallet pattern verified? A flexible system earns its value when a trained operator can change products accurately without waiting for a robot programmer.

7. Map the Factory Layout and Material Flow

Measure the available footprint and mark columns, doors, drains, electrical cabinets, fire routes, forklift lanes and operator access. Include the direction and height of the incoming conveyor, where empty pallets arrive and how full pallets leave. A cell that fits on a clean drawing may still obstruct a daily task.

Decide whether the system will remain on one line or be reconfigured later. EasyPalletizer Basic offers a straightforward starting platform, while EasyPalletizer, EasyPalletizer Pro, EasyPallet Station and EasyPalletizer Flex address different layout and growth needs. The right choice depends on a reach and application review, not the product name alone.

8. Treat Safety as an Application Decision

A collaborative robot is one component of a machine; it does not automatically make every palletizing application collaborative. Product edges, gripper design, payload, speed, pallet condition, trapping points and nearby equipment all affect risk. The complete installation needs an application-specific risk assessment and the safeguards identified by that assessment.

Ask who is responsible for the assessment, validation, technical file, operator instructions and final sign-off in your market. Depending on the result, the design may use safety-rated monitoring, scanners, light curtains, guarding or restricted operating zones. Resolve this during specification so safety is engineered into the layout and quotation.

9. Define Integration, Acceptance and Support Before Ordering

Clarify every interface: conveyor ready signals, product sensors, upstream stop requests, pallet-present detection, full-pallet notification, emergency-stop circuits and production data. Agree who supplies each cable, sensor, valve and software connection.

Put acceptance criteria in writing. Define the products and patterns to be tested, sustained rate, permitted intervention, changeover procedure, training, documentation and support response. Also ask how new recipes are created and how backups are restored. A clear acceptance plan turns “the robot moves boxes” into a measurable production result.

A Simple Cobot Palletizer Specification Sheet

Frequently Asked Questions

Choose the Application First, Then the Hardware

The right robotic palletizer is not necessarily the largest, fastest or most expensive option. It is the system that handles your full product range, reaches the complete pallet, maintains the required production rate, fits the factory and can be changed and supported by the people who will use it.

Complete the specification table before requesting a quote. The extra hour spent measuring products, pallets and floor space will produce a more accurate recommendation, a clearer project scope and fewer surprises during commissioning.