Experience on both sides of a log scanner

The first experience with trunk X-rays came from the sawmill side when Finnos's scanner was installed at Janatuinen's then-workplace. He worked as a quality controller and was involved on the customer's side in the advance preparations for the installation project, namely regarding sorting and receiving rules.

The background work has helped Janatuinen understand the customer's perspective. He knows how operators work and how customers should be trained for the best possible utilization of warehouse scanners.

Tucky's journey through the scanner

The log has traveled a long way by truck or train before arriving at the sawmill. At the end of the journey, the logs are unloaded directly onto the log deck and then they first pass through an X-ray scanner.

The scanner identifies the specific quality of each log according to the sorting rules. Based on the scanning result, the logs are directed from the conveyor to appropriate compartments according to the rules. The operator sees the overall situation within the framework of the sorting rules, and when a compartment is full, a wheel loader transports the logs to piles of the same quality. 

The most common sorting criterion is the debarked diameter of the log, Janatuinen explains. Because the goal is to get as much lumber as possible, this scanning result alone brings significant economic benefits to the mill. A log that is too small produces underweight boards, or one that is too large would result in too much sawdust. Additional internal quality rules can naturally be defined.

The log scanner processes logs as quickly as the saw's conveyor speed allows. There hasn't been a limit yet where processing has to be slowed down due to scanning.

An application specialist steps in after mechanical commissioning.

Henna Janatuinen works with software on the implementation side. When the next installation is known, Janatuinen contacts the customer. The kick-off meeting provides an understanding of how to define reception and sorting rules, what reports are needed, what kind of message traffic is required, and what external systems are available at the mill.

Understanding the current situation is important in that the initial rules are put in place correctly. This way, everything will be ready before implementation.

In Finland, the reception at many sawmills is similar, so remote meetings are sufficient in the initial phase. Regarding the software itself, there's no need to visit the sawmill beforehand, as everything can be done remotely.

Scanner mechanical installation is done first. The frames vary with different saws, and modifications to the conveyor structures need to be made as required. Sometimes even the ceiling is opened to get the scanner into place.

Once the mechanical installation is complete, the scanner is in place, and the block can be passed through, Janatuinen will then arrive on-site to carry out the commissioning and final tests.

Testing is done using test supports and is also a natural part of user training. Operators run the line according to how the logs are to be tested. The actual user training is of course done separately, and at the same time, the client also receives radiation safety training. Once the tests have passed successfully, actual production and the proper reception of logs begin.

While production is underway, Janatuinen is on hand to oversee the process and provide training at the same time.

It is important for customers to receive immediate answers to potential problems and questions.As production cycles continue, data is accumulated and utilized for simulations and production planning. Customers can create their own new rules, Janatuinen explains. This is not a one-time investment; the software and objectives continue to evolve even after installation and deployment.

Most of the training occurs during implementation, but Janatuinen arranges further training for customers as needed. Finnos provides support and advice after implementation, as the goal is for the customer to be able to develop their operations through the use of scanners.

Interesting challenges in foreign installations

Janatuis has experience with various sites in Finland, Sweden, Estonia, Lithuania, and Belarus. There are country-specific differences. Reception varies in different countries. For example, in Finland, the reception volume is measured from the top of the shell, while in other countries it is often measured from the bottom. Authority inspections also vary.

The most challenging part is the first project in a new country. Legislation varies, and sometimes you have to overcome the language barrier. The situation is easier in Sweden because installations have already been done there several times.

Project duration varies. In Finland, installation projects can be completed quickly, even as express installations. Possible special situations require additional work and we aim to map them out as thoroughly as possible at the beginning of the project. Ultimately, it's always great to see production up and running.

And what's the best part of your job? Janatuinen doesn't have to think long about the answer. It's rewarding to see that the preparatory work has been successful and production gets off to a great start. At the sawmills, the customers are knowledgeable, and the collaboration is meaningful. It's interesting to learn firsthand abroad how the reception goes there. Good feedback comes from the use of X-ray qualities and the customer's experience of success.