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Using AGVs for Food &
Beverage Material Handling

From moving pallets of finished goods to transporting vats of liquid ingredients, the potential usage of AGVs and AMRs in the food and beverage industry is vast. But which vehicles suit which tasks? How are these solutions integrated? And what does best practice look like? This guide is designed to help.

Benefits of AGVs

Automated guided vehicles (AGVs) can help food and beverage processing operations to address many of today's pressing business challenges, from the difficulty of hiring and retaining staff to the need to improve productivity and on-site safety. Below are the main reasons such companies are making the move to mobile automation. 

  1. Maximize productivity
    In a highly competitive industry battling razor-thin margins and rising energy prices, AGVs enables firms to automate more of their processes and move more towards 24/7 operation, for example by preparing ingredients or stock before staff arrive on-site for a more efficient start to the production shift.
  2. Overcome staffing challenges
    Food and beverage producers are struggling with a serious staff shortage, and due to the dull, repetitive nature of material handling tasks, retaining existing staff is also a challenge. AGVs are 'easy' to recruit, never need a sick day and don't take vacations. Once implemented, they allow existing staff to be repurposed to higher value, more engaging tasks.
  3. Reduced damage
    The mishandling of often perishable ingredients and finished products by human truck operators is a very real issue. With their pre-programmed behaviors, including handshakes with other machines, AGVs are proven to substantially reduce damage, not only to food and beverage products themselves, but also other on-site infrastructure such as racks, tanks etc.
  4.  Flexibility
    Unliked conveyors and rail-guided transport systems, AGVs and AMRs enable space on-site to be used flexibly, leaving more space for human workers and other vehicles to move around. In addition, when vehicles are driven by modern technologies such as ANT navigation, their routes can be reprogrammed quickly and easily with just a few software clicks, rather than tearing up and re-applying magnetic tape, or redesigning reflector layouts.
  5. Reduced waiting times
    With the correct amount of AGVs installed, one vehicle can always be ready to carry out an internal logistics mission, triggered automatically by via its fleet management software.
  6. Improved on-site safety
    With their logical, pre-programmed behavior and built-in safety systems, AGVs and AMRs are significantly less dangerous then their human-driven counterparts, which are responsible for many thousands of incidents every year. Proving this point, some large manufactures are starting to ban the use of manual trucks in production areas. The result of automating internal transport processes? Virtually zero recordable incidents and happier, more relaxed staff.
  7. Improved traceability
    As goods are often perishable, it is crucial for food and beverage producers to know exactly where every item is and, in the case of items with more demanding safety ratings, since when. However, human forklift operators are, naturally, prone to occasional errors. By contrast, an AGV's behavior is highly predictable, and its missions known and recorded, allowing for full traceability of stock when integrated alongside tracking technologies such as RFID.
  8. Improved energy efficiency
    With their carefully optimized transport routes and automated on-demand operation, non-polluting, all-electric AGVs use only the energy required for their missions. Since most vehicles' navigation systems do not require light to calculate a vehicle's position, AGVs can also be used in 'lights-off' settings, such as before or after human shifts (e.g., to bring ingredients to production or finished goods back to the warehouse).
  9. A better ordered site
    For AGVs to be successfully deployed, firstly internal logistics processes must be defined and, as much as possible, standardized. And since AGVs will struggle to travel through a cluttered aisle, they can also end up motivating workers to be more disciplined about keeping things in order.

Common applications

The range of AGV and AMR use cases in food and beverage production is wide and continues to grow as more custom-designed vehicles hit the market. However, pallet-based transfers remain the most common type of process automated with mobile robots.

Vehicle types

Which types of mobile robot are best suited to different material handling processes? The quick guide below details the two common AGV/AMR form factors and their transport compatibility.

1. Forked AGVs/automated forklifts

While forked AGVs are designed to only operation autonomously, automated forklifts typically offer 'hybrid' operation, allowing an operator to jump onboard and drive a truck manually (for example, if an urgent, unplanned pickup is required).

EUR pallet style vehicles usually feature a 'fork over leg' design, while North America-targeted vehicles are usually counterbalanced – with only forks, no underlying legs – enabling them to pick-up closed-style GMA pallets. Side-shifting forks and a tilting mast are recommended in order to pick along walls, or from gravity racks.

Suits: transportation and stacking of pallets and palletized loads such as IBCs (ingredients, finished goods etc.), movement of racks/cages).

Read -> How to buy a pallet truck AGV

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2. Underride AGVs

Underride AGVs, sometimes known as mouse AGVs, drive underneath their payloads and attach to these in different ways (via tow pins, lift modules with guides etc.). Some models are also capable of towing their loads.

Suits: transportation of rack-based payloads, such as vats and tanks of liquid ingredients/finished goods.

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Also available: Unit load AGVs + Tow Tractor AGVs

These two types of mobile robot are less commonly used in the food and beverage sector, but they can still suit certain custom applications.

Unit load AGVs

Unit loaders carry their payloads on top and are available with a wide range of transfer devices including, for example, conveyors.

Suits: transfer of finished goods/palletized loads, e.g., from conveyor to conveyor.

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Tow tractor AGVs

Also known as tugger or tug AGVs, these systems are designed to move trains of wheeled carts. Various types of connection are possible, with varying degrees of connection automation, depending on the provider.

Suits: production to warehouse transfers, building to building transfer of large items,  line side replenishment.

Read: > How to buy a tugger AGV

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Integration

To ensure your mobile robotics deployment is a first-time success, it is important to plan your AGV/AMR deployment carefully, working closely with your lead integrator. By following established best practice your combined team can mitigate risk, minimizing the number of potential issues, ensuring minimal downtime, and ensuring positive acceptance of this technology by your staff.

A simple way to understand the process of integrating and then running AGVs/AMRs in a facility is by breaking this down into three phases:

1. Pre-comissioning

This involves carefully planning and, ideally, also simulating your mobile robotics deployment with the help of your integrator.

2. Commissioning

This covers the arrival and deployment on-site of your AGVs or AMRs, including the programming of their routes and actions, the final configuration of your fleet manager, and integration with existing on-site equipment and software systems such as ERP, WMS etc.

3. Operation & optimization

Once your AGVs/AMRs are installed and operational, your staff and your integrator's team must be able to view your robots' operations in real time, and gain access to detailed reporting and analytics in order to continually optimize their usage.

Read -> AGV integration explained

Industry-specific considerations

Every industry has its own requirements and challenges. When it comes to implementing mobile robots in food and beverage processing operations, there are several factors to consider, which can impact the success of an AGV or AMR installation. Let's explore them...

Many food and beverage operations have grown organically on brownfield sites, which unlike new buildings were not designed with robotics and automation in mind. Therefore, AGV technologies must be flexible enough to operate seamlessly in what are complex, often tight environments.

Be sure to check how a vehicle's navigation system works, as this can have a big impact on a robot's flexibility and ease of installation/modification.

If a vehicle will experience significant temperature variations – for example, when moving in and out of chilled storage – electronic components such as its sensors could malfunction. The same goes for humidity, which can create rust. Therefore, a vehicle's design  must be adapted to its environment. This could cover special casing, electronic components with greater tolerance, or even special cooling/heating systems onboard. Your vehicle supplier should  should consider such options.

Tip: Be sure to include a long-duration test during an installation's FAT to verify that vehicle performance is not affected by these factors. You can ask your supplier to provide specific troubleshooting and error handling processes for environment-related errors. You could also request a longer warranty period.

Over time robots can become contaminated with food debris or powder, such as flour, corn starch etc. The accumulation of such contaminants risks affecting the performance of a vehicle's mechanical parts. It can even create an explosion risk. Equally, your industry's standards may require cleaning equipment at regular intervals. In the case of frozen food, or food that cannot be exposed to certain conditions, AGVs should follow a pre-defined path and send an alert to the fleet management system if the required conditions are not met.

Tips:

  • Include hygiene processes and food safety requirements as early as possible in your conversations with potential AGV/AMR suppliers. Your supplier should consider your industry's standards and any environmental constraints when creating a custom vehicle maintenance plan.
  • Your AGV's specific design should also address such risks, for example by being IP65 compliant or by providing easy access to those parts of the AGV that need regular cleaning.
  • Lastly, if your environment conditions are highly specific – such as in bakeries and confectionary manufacturing – it may be best to work with vehicle suppliers, or third-party system integrators, who have specific experience in your sector.

Wet and slippery floors are a common feature in some food production environments. A vehicle's integrator should consider this factor carefully, optimizing the type of wheels used, designing routes to avoid drain holes, and programming a vehicle's fleet management software to modify a vehicle's speeds based on the floor conditions in affected areas to safeguard against vehicle slippage. Floor/skid testing should be included in a system's Factory Acceptance Test (FAT).

Food and beverage is a high-throughput industry and space is expensive, so lots of materials must be squeezed into small spaces. Diverse types of racks are used, and it is common to stack pallets by two or more, indoor and outdoor.

When implementing automated vehicles, it is recommended to review your entire storage space and evaluate a range of strategies, rather than automating your existing manual processes by default. Depending on throughput needs and safety requirements, it may be logical, for example to embrace more stacking or to only use racks, even to combine more advanced shuttle racks with AGVs. Note that tracking empty slots and creating the correct missions may require additional logic, sensors, or software.

In many food plants powdered ingredients release small quantities of particles into the air. In such settings, dust can easily accumulate on a vehicle's sensors. These particles can also stay in the air, creating an explosion hazard.

AGVs and their respective maintenance programs should be designed, or adapted, with such factors in mind. In the case of hardware, this might mean a vehicle with a built-in component cooling system, or LiDAR safety laser/navigation scanners with either dust blowers or a daily (or even more frequent) sensor cleaning program.

At a software level, it almost certainly means  the careful designing and programming of an AGV's fleet management system in order to generate and send safety-related errors in a reliable, efficient manner.

Calculating return on investment

In order to get management buy-in for any AGV/AMR investment, it is important to calculate how long it will take for your vehicles to pay for themselves and what subsequent savings they might represent over time (compared, for example, to using human-driven vehicles).

There are several types of information you will require to start performing such calculations. Specifically:

  • How many manually-driven vehicles your company is using today.
  • How much these vehicles cost to run (inc. driver salaries and related overheads).
  • The estimated annual cost of damage to goods and equipment caused by these vehicles.
  • How many AGVs you would require to replace these vehicles: if in doubt, 1.4 AGVs per 1 manual vehicle is a solid starting point.
  • How much your preferred AGV model costs.
  • How complex your proposed AGV project will be (in terms of no. of pick/drop points, required software integrations etc.).
  • Operational information such as the no. of shifts/day your plant runs: the number of shifts over which you will use your automated guided vehicles arguably has the greatest single-factor impact on their ROI over time.

With these details to hand, you can start to calculate the potential savings over time of automating your material handling with AGVs.

Here are two resources to help:

  1. Step-by-step guide to calculating AGV/AMR ROI
  2. AGV ROI calculator

3 hidden costs of AGVs in the food and beverage industry

  • Seasonality: be sure to consider the seasonality of your business. You may try to ask AGV suppliers for a seasonal rent, a lease, or a pay-per-pallet program in order to optimize ROI.
  • Cleaning: be sure to factor in the time needed to clean and maintain your robots. You could also consider automating the cleaning of your site's floors by adding an automatic scrubber dryer robot to your fleet.
  • Floor refurbishment: certain types of flooring associated with old factories and brownfield sites – such as tiles – simply do not suit AGV use. Be sure to evaluate flooring with your supplier and adapt as required. You might then need to incorporate any related costs into your ROI calculations.

Success stories

Explore three successful AGV deployments from the food processing space below.

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Is your company currently planning its AGV/AMR program? Do you have questions about which vehicles would suit your operation, how these should be integrated, or how fleet management works?

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