Metal can manufacturing equipment is built to last. Bodymakers, presses, decorators, neckers and other major production assets can remain productive for decades with proper maintenance.
Inspection technology often has a much shorter lifecycle. Cameras, processors, electronics, operating systems and machine vision software can become obsolete while the equipment around them still has years of productive life.
For food and beverage canmakers operating brownfield can production lines, the question isn't simply how old an inspection system is. It's whether that system is beginning to affect uptime, quality, spoilage or production flexibility.
Here are five signs it may be time to take a closer look at your can inspection systems.
A camera fails. A processor needs replacement. Maintenance discovers the component has been discontinued or now carries a long lead time.
Many plants keep legacy metal packaging systems operating by stocking spare electronics, sourcing refurbished components or cannibalizing inactive equipment. These approaches can work, but they also increase the consequences of an unexpected failure.
The important question isn't just, "Is our can inspection system working?" It's also, "How quickly can we recover if it stops working?"
If one failed component could leave a high-speed can line waiting days or weeks for a replacement, obsolescence has become a production risk—not simply a maintenance issue.
Metal is a challenging material to inspect. Reflective surfaces, coatings, complex geometries and high line speeds can make distinguishing normal product variation from an actual defect difficult.
An effective can inspection system needs to detect meaningful defects without unnecessarily rejecting good product. As older systems become harder to optimize, operators may compensate by continually adjusting inspection thresholds.
Too much sensitivity creates false rejects and unnecessary spoilage. Too little can increase the risk of defective product moving downstream.
Changes in lightweighting, coatings, can designs, ends and customer specifications can make the problem more pronounced. Inspection technology originally configured for yesterday's products may struggle to efficiently handle today's production mix.
When frequent inspection adjustments become part of normal production, it may be time to determine whether the technology still matches the application.
Detecting and rejecting a defective can protects quality. Identifying why the defect occurred can help prevent the next hundred.
This is where newer inspection technology can provide significantly more value than a simple pass/fail decision.
With machine correlation, inspection results can be associated with upstream production equipment. Depending on the application, recurring defects may be traced to a particular bodymaker, spray gun, necker pocket or other machine position.
Instead of maintenance personnel searching the entire process for the source of rising spoilage, inspection data can help direct them toward the equipment that needs attention.
This is particularly valuable in brownfield plants. Existing production machinery may still be mechanically productive but provide limited diagnostic information. Modern inspection can add greater process visibility without requiring those assets to be replaced.
Food and beverage canmakers continually adapt to new dimensions, lightweighted designs, coatings, ends, graphics and customer requirements. Inspection needs to keep pace.
On some legacy systems, introducing a new product requires extensive manual configuration or help from the plant's most experienced inspection technician. Older cameras, lighting and processing hardware can also limit the types of inspections the system can reliably perform.
Eventually, the production equipment may be capable of making the product while the inspection system becomes the constraint.
Modernizing the inspection layer can address that limitation without replacing productive mechanical equipment. Better recipe management, newer imaging technology and more flexible inspection tools can make it easier to accommodate changing production requirements while maintaining consistent quality standards.
Legacy systems rarely become production risks overnight. Costs usually accumulate gradually.
Maintenance stocks more spare electronics. A technician spends another shift troubleshooting a problem. Operators tolerate additional false rejects. Another upgrade gets postponed because there never seems to be a good time to stop production.
Individually, these costs can be easy to overlook. Together, they can change the economics of maintaining an aging inspection system.
When evaluating modernization, consider more than the price of new equipment. Unplanned downtime, spare-parts inventories, troubleshooting hours, false rejects, spoilage, operator intervention and quality risk all contribute to the true cost of maintaining a legacy system.
And modernization doesn't necessarily mean replacing the entire line.
Depending on the application, existing conveyors, handling equipment and other mechanical components may still be usable while cameras, lighting, processors, electronics and software are upgraded.
One of the realities of brownfield can production is that different parts of the line age at different rates.
A bodymaker, press, necker or conveyor may still have substantial productive life even when the inspection technology around it has become difficult to maintain. The goal should not be to replace equipment simply because it is old, but to identify which technologies are beginning to create unnecessary production risk.
Pressco has decades of experience developing vision inspection technologies for food and beverage cans, shells, ends and closures. Solutions such as INTELLISPEC™ FOCAL POINT, RETRO-SPEC™, CHROMAPULSE™ and machine correlation give canmakers options for modernizing inspection while working within existing production environments.
For canmakers evaluating a legacy inspection system, start with a simple question: Is this system still helping us protect production, or are we increasingly working around its limitations?
The answer can help determine where modernization will deliver the most value.
For canmakers evaluating a legacy inspection system, start with a simple question: Is this system still helping us protect production, or are we increasingly working around its limitations?
Consider modernization when obsolete components, increasing maintenance requirements, excessive false rejects, difficult changeovers or limited troubleshooting capabilities begin affecting production or quality.
In many cases, yes. Brownfield modernization can integrate newer inspection technology with existing production and conveyance equipment, depending on line configuration, speed, controls and inspection requirements.
Machine correlation connects inspection results with upstream production equipment. It can help identify whether recurring defects are associated with a particular bodymaker, spray gun, necker pocket or other machine position, allowing production teams to troubleshoot more efficiently.
Brownfield modernization means selectively upgrading technology on an existing production line rather than replacing the entire line. This can include newer inspection, controls, electronics, connectivity or analytics while retaining productive mechanical equipment.