Hardwood sawmill Amex Bois Franc

Tired of high scrap lumber rates?
Automation is the answer

By Matthew Nemeth,
E+E Elektronik

Years ago, drying wood for use in construction, furniture, and even firewood took months or even years. Now, thanks to the kiln-drying process and advancements in technology, sawmills can achieve the optimal moisture content necessary for specific uses of wood in as little as a few days. Nevertheless, drying lumber is a tedious task that requires accuracy, attention to detail and careful application.

Accelerating a natural process demands high precision given the complexity of manipulating variables. A well-done application will require the measurement of relative humidity and airflow to control the rate at which the surface of the wood releases moisture. In parallel, there must be precise temperatures to accelerate the diffusion process of pulling moisture from the center of the wood to its surface. These variables must all be controlled simultaneously and in cooperation to ensure a high-quality product that achieves the desired moisture content.

When done correctly, lumber will achieve an on-target moisture percentage, giving sawmills a higher-quality yield and therefore higher marginal revenue. Inaccurate controls, however, can cause the quality of the board to suffer. When air circulation is too slow, the drying rate is slower than necessary, and mould could develop on the surface of lumber. On the other hand, if air circulation is too fast, surface checking and other drying defects can develop. In terms of humidity, if it is too low in the early stages of drying, it can lead to excessive shrinking, resulting in surface and end checking. Outside of quality, poor control of variables can lead to incorrect specified-moisture content, the level of dryness necessary for a particular use of wood.

Greater Control Inside Your Kiln

A simple and cost-effective improvement that can have a significant impact is the introduction of automated humidity sensors. E+E Elektronik’s high-end humidity and temperature sensor with smart relay, which allows for remote control of the electrical circuit (EE-310,) was purposefully designed for industrial uses such as in sawmills and kiln-drying environments. This sensor accurately measures humidity, and the smart relay can adjust the temperature as needed, just as an operator doing manual checks would. The ability to withstand up to 180°C (365°F) paired with its proprietary corrosion-resistant coating makes it the most advanced and effective sensor for kiln-drying applications.

In addition to lumber with fewer defects due to weather, installation of sensors boasts long-term financial gains. For example: A sawmill scraps 250 thousand board feet. The current price of lumber is $380.90 per thousand board feet, as it was recently, and the sawmill’s gross margin is estimated at 50 per cent. This results in a whopping $47,612.50 loss.

Incorporating sensors can reduce scrap by as much as 80 per cent for a savings of more than $38,000 using the above example. Furthermore, sawmills can realize considerable labour cost savings due to the automation of data collection and can shift those labour resources to focus on increasing production.

White Paper Explores Automation Using Sensors

In E+E Elektronik’s latest white paper, “Automating Simple Tasks Using Sensors,” we calculate how the cost of the sensor investment can be recuperated within one month, when accounting for staff turnover and the savings from a lower scrapping rate. For those sawmills that already have sensors implemented into their drying process, they can still reap financial rewards from upgrading their sensors to ones with higher accuracy and durability.

When choosing a sensor, it’s important to consider long-term stability, accurate measurements in a harsh environment, robustness, high resistance against pollutants, and the opportunity for easy, periodic maintenance and calibration.

For more information about E+E Elektronik sensors and technology, check out our website at epluse.com

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Matthew Nemeth is Managing Director in the U.S. for E + E Elektronik, an Austrian-based Internet-of-Things technology company that develops and manufactures sensors, transmitters, hand-helds and data loggers for air velocity, CO2, relative humidity, dew point, flow, moisture in oil, pressure and temperature. E+E operates a nationally accredited calibration lab and is appointed to maintain the National Standard for Humidity and Air Flow Speed in Austria.

E+E Elektronik, USA 847-495-7744 [email protected]

Logging and Sawmilling Journal

July/August 2023

On the Cover:
Michel and Christine Parent have built MDA Foresterie from a single machine slashing wood at roadside to a five-machine cut-to-length operation which produces 75,000 to 80,000 tonnes of wood annually. Their plans call for cutting back their current operation by selling their cut-to-length processors and forwarder to their sons David and Anthony, and offering them guidance on how to build their own forestry contracting business. cover photo by George Fullerton).

B.C. forest industry facing a brewing crisis
Forest industry consultant David Elstone talks about how B.C.’s forest sector is facing a brewing crisis—strong markets in the last couple of years have delayed some of the effects of challenges in B.C., but that has changed rapidly with recent weakening markets.

Parents passing over logging operation to the next generation
The successful Parent Family logging operation in New Brunswick—supported by solid iron in the bush—is in the process of being handed over to the next generation.

Wide wood basket for global customers
Hardwood sawmill Amex Bois Franc is using its base in a small Quebec town—and a large wood basket—to produce high quality wood products to ship all over the world.

Guest Column
Tired of high scrap lumber rates? Automation is the answer, says Matthew Nemeth, of E+E Elektronik.

Resourceful repurposing
Ontario sawmiller Ken Zoschke takes resourcefulness to a whole other level with his operation in eastern Ontario; the power unit for his mill operation is the cab and chassis of a repurposed International truck with a L10 Cummins engine.

All in the Family
The Forvico/Boisverco logging/woodworking operation is truly a family enterprise, with the children and grandchildren of Marc and Julie Vigneault involved in the business.

Living a sawmilling dream
Daniel Chassé is literally living the dream these days, running a sawmill business that produces high quality wood products from less commercially popular species.

How to choose the right manufacturing partner for your sprocket needs
Drop Sprocket on how to gear up for success, and find the perfect manufacturing partner for your sprocket needs.

The EDGE
Included in this edition of The Edge, Canada’s leading publication on research in the forest industry, is a story from the Canadian Wood Fibre Centre (CWFC).

The Last Word
This year’s terrible wildfire season demonstrates the need to develop more resilient forests, says Tony Kryzanowski.

Departments

Tech Update

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