Pneumatic cylinders that break and cause a production stop is the most frequent hardware-related cause of downtime for NPB equipment. But with data at hand, they have been able to predict - and eliminate - the issue at one customer's production site.
"The cylinder drift event has the potential to save our customers days of downtime, since we can see indicators of abnormal behavior before an actual breakdown."
Olof Blom, Digital Services & Automation Engineer at NPB Automation AB
As a supplier of production equipment to some of the world’s biggest beverage brands, it’s extremely important to NPB Automation AB that they meet their customer’s expectations to yield and uptime during the entire lifetime of the equipment. So, avoiding breakdowns entirely or providing swift troubleshooting when things do go bad is a key priority.
NPB decided to put our CATCH.AI data platform to the test by zeroing in on the most difficult use case: Spotting wear and tear on pneumatic cylinders before they broke and caused a production stop. This was the most frequent hardware-related cause of downtime, but due to the inconsistent nature of compressed air also to hardest one to predict.
"We collect basically everything there is to look at in the machine: Sensors, steps of sequences, temperatures, whatever. CCTV footage goes in as well. And then we can look at every point of data we have collected at a given time."
Olof Blom, Digital Services & Automation Engineer at NPB Automation AB
High-frequency data capture across the entire line. The CATCH.AI data platform automatically structures and normalizes the data.
“We collect basically everything there is to look at in the machine: Sensors, steps of sequences, temperatures, whatever. CCTV footage goes in as well. And then we can look at every point of data we have collected at a given time” says Olof Blom.
NPB used the platform’s rule engine to generate events when certain issues occurred, enabling them to jump from the event to the relevant camera view for immediate visual confirmation.
They also built a wide range of custom dashboards ranging from a quick overview of potential hot spots with color-coded status and event charts to per-machine drilldowns used for detailed troubleshooting.
Based on their extensive knowledge of the machine, they created a rule that would track air pressure vs. stroke time. If the time deviates by more than 15% repeatedly (e.g. six times in a row), this indicates an impending failure.
“If the air pressure remains the same but the time fluctuates, that means that the mechanical part is probably going bad soon,” says Olof Blom.
With that knowledge, they could notify their customer to let them schedule maintenance instead of risking an emergency stop. It also gave the customer time to ensure that they had the right spare parts available.
NPB also uses the data platform for troubleshooting when new issues arise.
This is a big benefit in terms of handling support cases quickly and often saves them an expensive site visit. “We can solve the issue a lot more efficiently than by having someone travel to site and look at this for day or two,” says Olof Blom.
Because the platform collects and normalizes so much data at such a high frequency, NPB can draw on a wealth of time-aligned data for their root cause analyses.
This way they have been able to determine where and why things got out of sync, when paired linear units momentarily lost sync and dropped a product.
They have also caught very brief (we’re talking milliseconds!) sensor dropouts that hadn’t yet caused failures but might lead to overheating, breakdowns or quality issues if not fixed.
The data also produced new learnings. The camera evidence helped them tie longer stroke times to specific mechanical hang-ups (e.g. a product sticking at the same infeed position).
Where their old system provided them with only an alarm and a timestamp, CATCH.AI gives them the full context: Upstream/downstream machines, temperatures, alarms, sequences, operator actions, etc.
Olof Blom also stresses the ability to “form and shape things” to their exact use cases. “Most other tools we’ve looked at are locked in their pre-built configurations”.
NPBs customers will be able to get real-time production insights, e.g. with a production floor dashboard that highlights stations with frequent events, guiding operators and technicians in their work.
With this data available, they’d be able to see “this machine is operating poorly. I should probably pay attention there,” says Olof Blom.