Tissue and nonwovens mills rely primarily on the performance of their machinery to ensure they produce a high-quality product in a reasonable time and at optimal productivity. If this machinery is not running at peak efficiency or if it breaks down, production can slow down or stop altogether.
Yet, the equipment and machinery in a mill is subjected to extreme conditions on a daily basis. Machines in the mill are exposed to things like significant temperature variations and ongoing wear and tear that can impact their performance over time.
In the past it was difficult, if not impossible, to detect small dips in machinery performance simply because the human eye can’t detect small changes in things like machine vibration or speed. By the time a lag in performance was noticeable, the machine was often already at a point of needing repair or would break down entirely. This is one of the biggest causes of lost productivity in the mill. Fortunately, with today’s technology, it is possible to perform real time analytics, allowing mill staff to know the precise state of their machinery performance at all times.
Measures of Machine Performance
It has been common knowledge for more than 20 years that improving the performance and productivity of fixed assets is the best way to improve shareholder returns. Over the years, a number of key performance indicators (KPIs) have been developed to measure machine performance. Of these KPIs, Overall Equipment Effectiveness (OEE) has become an industry standard for the tissue and nonwovens mill.
OEE measures three categories within the mill: equipment availability, equipment performance, and product quality. When it comes to machine performance in the tissue and nonwovens mill, the focus is specifically on equipment availability, the amount of time the machine is actually up and running, and equipment speed.
While it is easy to see when a machine is running and when it isn’t, it isn’t always easy to see why it has stopped running or to see this downtime coming. When it comes to machine speed, it is not possible to detect small changes in that speed simply by looking at it. In the past, we simply did the best we could and dealt with machine downtime. However, today we have new technology that makes real time analytics possible.
The Role of Industry 4.0
Industry 4.0 is the key to ensuring optimal performance of mill machinery. It offers a combination of the Industrial Internet of Things (IIoT), data management, and artificial intelligence (AI)/machine learning that make it possible to continuously monitor every machine in every plant, as well as overall plant operations.
Pivotal to the measurement of machine performance in real time is IIoT. IIoT requires the installation of thousands of sensors and cameras along the production line. Every single machine will have dozens or hundreds of sensors that are continuously measuring every single aspect of the machine during operation. These sensors can gather data in a digital format from parts of the machine that mill workers cannot view adequately. They can sense changes in the machine’s operation that the human eye can’t even detect, all in real time.
The sensors on each machine are part of a company-wide network of sensors and devices that are connected to the cloud. As the data are collected, they are gathered and fed into AI software that can provide real-time analytics. Machine learning allows the machinery to make adjustments in real time and the system can alert staff to anomalous readings and let them know when maintenance is required.
A Bird’s Eye View with Real Time Analytics
How does all this improve machine performance? Since data are constantly flowing in from sensors that are sensitive enough to detect the slightest changes in machine performance, real time analytics:
- provides a closeup view of the different variables affecting machine performance;
- determines the probability that the machine will break down;
- anticipates and schedules predictive maintenance.
In other words, when something isn’t working at peak efficiency and speed, the system will pick up on that. Maintenance can then be scheduled before those minor anomalies become big enough to cause the machine to slow down or break down entirely. In addition, with such detailed data from every part of every machine, a tissue and nonwovens mill can tweak environmental and machine settings to ensure the highest possible speed a machine can be run at without compromising product quality. This pushes machine performance to its optimal state, and when you can accomplish this, equipment availability and equipment speed scores increase and your overall OEE score goes up.
The technology available today has made Industry 4.0 possible, and with that, real time analytics is also possible. With the ability to collect data continuously and while a machine is in operation, the chances of a machine going offline or slowing down are significantly reduced. This provides tissue and nonwovens mills with much tighter control over all aspects of their operations and allows them to automate their processes so they can increase operational efficiency and make better product with less waste and in less time. Since time is money, this is the ideal situation for any tissue and nonwovens company competing in the market today.
For more information about measuring machine performance in your tissue and nonwovens mill, please take a look at our eBook The Ultimate Industry 4.0 Guide for the Tissue and Nonwovens Market.