How to Select a Robotic Palletising System

Robotic palletising is the most visible step in end-of-line automation, yet selecting the right system has less to do with the robot itself than with the line around it. The same robot arm will perform very differently depending on the product, the packaging and the upstream process. This guide summarises five criteria worth resolving before you reach the quotation stage.

1. Product and Packaging Characteristics

Every selection process starts with the product. Whether the unit to be palletised is a case, bag, pail, shrink-wrapped bundle or tray directly determines the gripper concept, the robot class and the achievable cycle time. A closed, rigid case can be handled at speed with a vacuum gripper, while a bag that does not hold its shape calls for a fork-type or combination gripper. The top surface of the pack, its compression strength, surface texture and whether the contents shift in transit all need individual assessment. Product weight should never be evaluated in isolation: gripper mass and multi-pick scenarios must be added before checking it against the robot payload. If several product families will run on the same line, ask early how the gripper will accommodate changeovers.

2. Throughput and Cycle Time

Separate the instantaneous peak rate of the line from its average rate. A palletising cell sized for the average will turn every upstream surge into accumulation and, eventually, a stoppage. Picking several products per cycle shortens the effective cycle time, but it requires products to be presented in a defined arrangement, which in turn shapes the infeed conveyor design. Feeding multiple production lines into one robot can reduce capital cost; if you take that route, the sequencing logic, pallet exchange time and the behaviour of the cell when one line stops must all be part of the capacity calculation.

3. Layer Configuration and Pallet Pattern

The pallet pattern is a balance between load stability and pallet utilisation. Interlocked patterns tie the layers together and improve stability, while column stacking makes better use of case compression strength. Decisions on slip sheets, layer count, permissible overhang and how the top layer behaves during transport belong in the design phase, not after commissioning. Pattern flexibility matters just as much: when a new product or case size is introduced, whether patterns can be created by an operator on site or require software support will define how usable the system remains over its lifetime.

4. Floor Space, Layout and Safety

The footprint of a palletising cell is far more than the robot reach envelope. Empty pallet magazines, full pallet discharge conveyors, slip sheet stations, safety fencing and operator access doors have to be planned together. The direction from which a forklift or automated vehicle collects the finished pallet, maintenance access and emergency stop scenarios are all part of the layout, not an afterthought. Where space is tight, compact cell arrangements or alternative robot kinematics can be considered, provided the throughput target is re-checked against them.

5. Line Integration and Control Architecture

A palletising cell never operates alone. It must run in step with upstream case packing, checkweighing and labelling equipment and with downstream stretch wrapping and dispatch conveyors. The PLC communication protocol, line stop and restart scenarios, recipe management and data exchange with plant management systems should be defined in writing as part of the integration scope. How pattern additions, format changes and remote support will work after commissioning is a conversation to have before the purchase order, not after.

Start with the Right Questions

The most expensive mistake in a palletising project is focusing on a single piece of equipment instead of the whole line. When product, throughput, pattern, space and integration are assessed together, the result is a cell that behaves predictably for its entire service life, and a tender process built on comparable, measurable requirements.

To evaluate the right robotic palletising solution for your production line, you can submit a project enquiry to the GMAK engineering team.