Automating the palletizing process streamlines operations at the end of a production line, enhances operational repeatability, and eliminates the need for manual handling of heavy loads. However, simply installing a robot does not automatically guarantee these benefits. Success depends on properly tailoring the system to the product’s specifications, required throughput, available space, and the overall organization of the production process. Consequently, the selection of a palletizing robot should begin with a detailed analysis of the specific application, rather than a direct comparison of individual equipment models.
Key factors to consider include the weight, dimensions, and type of packaging; the target pallet height; the required cycle time; the method for gripping the product; and the spatial constraints of the facility. It is also important to account for the frequency of format changes and the potential for future expansion of the workstation. Only by evaluating these parameters can one select a technology that ensures the necessary efficiency, reliability, and process flexibility.
Payload, reach, and performance – three fundamental parameters of a robot
One of the fundamental parameters to consider when selecting a palletizing robot is its payload capacity. It is important to note, however, that this does not refer solely to the weight of the carton, bag, crate, or shrink-wrapped pack. During each cycle, the robot also carries the gripper and its associated equipment; therefore, the actual load is the sum of the product’s weight and the total mass of the end effector. For this reason, a robot should not be selected based on its maximum payload limit. During the initial calculation phase, it is advisable to include a margin of approximately 20–30%, which provides greater configuration flexibility and can simplify future adjustments to the workstation for different products. Ultimately, the final selection should always be verified against the specific parameters of the chosen robot, the design of the gripper, and the characteristics of the operational cycle.
Another significant criterion is the working range. The robot’s workspace must encompass both the product pick-up point and all drop-off locations—including the furthest point on the top layer of the pallet. Given that unit loads can reach heights of approximately 1.8–2.4 meters once stacked, the geometry of the entire workstation becomes particularly important. The layout of the robot, conveyors, and pallets should allow for movement without collisions, avoiding unnecessarily long trajectories or extended cycle times.
Equally important is the required palletizing throughput. In many standard applications, robots perform about 6–12 cycles per minute; however, this figure should not be directly equated with the number of products handled. A well-designed gripper can pick up multiple packages—or an entire pre-arranged group—in a single cycle. This increases the workstation’s throughput without requiring a proportional increase in the robot’s movement speed.
Consequently, actual throughput should be evaluated in the context of the entire process—from the delivery of the product to the pick-up point, through its gripping and transport, to its placement on the pallet, as well as the exchange of full and empty load carriers.
Industrial robot, cobot, or column-mounted robot – which solution should you choose?
Once the basic process parameters have been defined, the next step is to select the type of robot best suited to the requirements of a given application. Different designs vary not only in terms of payload capacity and dynamics but also in their working envelope, the methods used to secure the workstation, and their integration capabilities.
A conventional industrial robot is primarily suited for environments where high throughput, heavy payload capacity, and intensive, multi-shift operation are the priorities. Multi-axis robots offer a high degree of freedom, enabling them to handle a variety of products, access multiple pick-up or drop-off points, and execute more complex trajectories. Such a setup, however, requires a properly designed safety system, based on a thorough risk assessment. Depending on the application, this may include measures such as physical fencing, light curtains, or safety scanners.
An alternative is the collaborative robot, or “cobot.” Its advantages include a compact design, relatively simple programming, and the ability to create workstations that facilitate closer interaction between humans and machines. It should be noted, however, that using a cobot does not automatically eliminate the need for additional safety measures. The overall safety of an application is determined by the entire system—including the type of end-effector (gripper), the mass and geometry of the product being handled, the speed of movement, and the organization of the workstation. In palletizing operations, cobots are typically used for tasks involving moderate cycle times and lighter loads.
It is also worth considering column-mounted robots, especially in applications where the efficient use of available space and the adaptation of the structure to a specific production line layout are crucial. At Lintegra, we tailor solutions to the requirements of each specific process, analyzing factors such as the necessary throughput, the weight and type of the load, the geometry of the workstation, and the organization of product flow. Depending on the needs, we can deploy column-mounted, industrial, or multi-axis robots. This ensures that the technology is adapted to the process, rather than forcing the process to conform to the capabilities of a single type of equipment.
The gripper is just as important as the robot itself
Even a robot that is correctly specified in terms of payload capacity and throughput will not ensure stable operation if the product-handling method is poorly designed. The gripper is one of the most critical components of a palletizing station; it is responsible for direct contact with the packaging and must ensure the load is held securely throughout the entire range of motion. Its design must account for not only the product’s weight and dimensions but also the packaging material, its rigidity, surface characteristics, the location of its center of gravity, and its susceptibility to deformation. For cartons and boxes, vacuum grippers—equipped with suction cups or foam pads—are frequently used. Conversely, bags, crates, or irregularly shaped packages may require the use of fork-style, mechanical, pneumatic, or under-reaching grippers.
The selection process should be preceded by trials conducted using the actual products. Cartons may deform under vacuum pressure, film may wrinkle, bags may change shape during movement, and porous or uneven surfaces can compromise the effectiveness of vacuum gripping. Such tests make it possible to verify not only the reliability of the grip but also its impact on packaging quality and the overall stability of the palletizing cycle.
Another essential aspect is the flexibility of the palletizing station, particularly in facilities where product formats or stacking patterns change frequently. The system should allow operators to efficiently switch between recipes and modify palletizing configurations without requiring intervention from a programmer each time. Intuitive software for creating and editing palletizing patterns helps reduce changeover times and allows for faster adjustment of the workstation to current production needs.
In solutions implemented by Lintegra, the control method and the design of the gripper are tailored to the type of packaging being handled, the process parameters, and the required flexibility of the production line. As a result, the workstation retains its functionality even when there are changes to the product range or the palletizing pattern.
A palletizing robot should be part of a complete process.
Selecting the right robot is only one stage in designing an efficient palletizing system. Equally important is its proper integration with other line components—such as product conveying systems, the supply of empty pallets and removal of full ones, safety systems, load securing equipment, and control automation. Only when these elements work together seamlessly can the robot’s full potential be realized and the target throughput maintained. Even a high-speed robot will fail to improve end-of-line efficiency if products are not delivered at the required rate, or if the removal of completed pallets becomes a process bottleneck.
For this reason, spatial constraints and the organization of material flow within the facility must be considered as early as the design phase. Factors such as available floor space and ceiling height, the layout of conveyors, the methods for product infeed and pallet outfeed, as well as designated zones for operators and internal transport vehicles, are all critical. Another key aspect is the integration of the workstation with the plant’s automation infrastructure—and, depending on production requirements, the ability to exchange data with IT systems.
Consequently, palletizing automation should be viewed as part of a comprehensive end-of-line process, rather than merely the purchase of an individual piece of equipment. At Lintegra, we design and integrate solutions tailored to specific production layouts, combining robotic palletizing with elements such as conveyor systems, load-securing technologies, and internal logistics solutions. This approach creates a cohesive system in which all individual components work in harmony—both mechanically and in terms of control.
There is no single palletizing robot that serves as the best solution for every production environment. The success of an implementation depends on the right combination of robot parameters, gripping technology, safety measures, available space, and integration with the rest of the production line. The more precisely the requirements are defined at the start of a project, the easier it becomes to create a workstation that not only meets the expected throughput but also maintains the necessary flexibility to adapt to changes in production. At Lintegra, we take a comprehensive approach to palletizing: we analyze the process, select the appropriate technology, and integrate all components to ensure that the workstation genuinely enhances the efficiency of the production line.