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Valmet to the fore Figur Best 1. Resultat length measurement av längdmätning. and Ljusgrön best crosscutting. stapel anger andel Valmet stockar left inom ± 2 cm. Mörkgrön the del competition är den nivå maskinen behind in skulle an important ha nått vid timber perfekt kalibrering value test. (teoretisk maxnivå). Röd linje anger medelnivå 2006 för de fem produktionsmaskinerna, grön linje skogsbrukets mål. Machine system 1 Machine system 2 Machine system 3 Machine system 4 Valmet 941/370.2 Every five years, the Swedish forestry research foundation Skogforsk conducts an extensive timber value test. This time, seven different machine systems were compared in areas such as length and diameter measurement, value crosscutting, and fixed length crosscutting. This is the third test conducted and Skogforsk concludes that harvesters in general show continual improvements in cap- 16 JUST FOREST NO 4 • 2007 0 10 20 30 Length measurement results. The bars represent the percentage of logs within ±0.78 inch (2 cm). The red line shows the average level of the five machine systems in 2006. The green line is the Swedish forestry industry’s goal. 40 turing timber value. Good length and diameter measurements are a prerequisite for getting the most value out of the timber. If machines measure correctly, crosscutting efficiency is higher. Komatsu Forest was represented by a Valmet 941 equipped with a Valmet 370.2 harvesting head and a Valmet Maxi harvester computer. This proved to be a winning combination in both measuring and crosscutting. The Valmet 50 60 70 80 90 machine system was the best in its class at length measurement. In the second test round, 93 percent of all logs fell within the correct length interval. “Once we’d adjusted the inching speed, we performed much better than our main competitors in length measurement accuracy,” says Per Annemalm, Product Manager at Komatsu Forest. The researchers at Skogforsk concluded with current measuring system designs. More exact 100 measurement will require new techniques that use remote or “touch-less” sensing. According to the test, Valmet’s current diameter measuring is reliable and has been refined and improved since the previous test. The improvement is due to factors that include better control, improved technology components, the new “regression analysis” calibration, and stronger machines. Crosscutting efficiency indicates how
much value the harvester manages to generate from each tree in relation to the optimal value if you knew the tree length and diameter in advance. The tests show that crosscutting efficiency is generally good, and Valmet was among the best machine systems. The researchers also reported that Valmet provided very high crosscutting efficiency, 99.1 percent, and was once again best of the bunch. “It’s difficult to progress much further with value crosscutting and it’s perhaps not even profitable for forest owners as the computer is forced to calculate even more alternatives, which can limit machine productivity and thereby increase harvesting costs,” Per explains. What’s more, extracting maximum value is not the only aim. Delivering what sawmills and industry need is important too. With fixed length crosscutting, the harvester meets saw- mill needs and the level of efficiency here indicates how well the crosscut timber matches the desired lengths. Each machine system was tested with 800 logs and the Valmet machine system crosscut more than 90 percent of the logs in the optimal manner, as per the crosscutting instructions. “We quickly achieved the desired fixed length crosscutting and remained at that level throughout the test,” says Per. r NEWS New major plywood factory in Siberia The largest plywood factory in Siberia and the Far East is being built in Krasnoyarsk in 2007. The goal is to produce enough plywood to consume 250,000 cubic meters from conifers and 100,000 cubic meters from birch annually. About 800 people will work at the production plant. Only large tree harvesting permitted Mozambique’s government has passed legislation that only permits certain tree species to be logged and then only those above a certain trunk diameter. Prime Minister Luisa Diogo told Agencia de Informacao de Mocambique that the law guarantees new growth and sustainability while securing the industry’s needs. Forest protection new source of income Forest owners in Finland are being offered new opportunities to earn from their forests. METSO, the program for biodiversity in the forests of southern Finland, has succeeded in getting many forest owners to consider alternatives to traditional timber production. Voluntary forest protection yields economic benefits equally as large as forestry while preserving the landscape in an undisturbed state for future generations. It takes about fifty years before thinning provides any real economic returns, and for many forest owners leaving things as they are is an alternative that provides a good conscience. JUST FOREST NO 4 • 2007 17
Page 1 and 2: INTERNATIONAL MAGAZINE 18 READ MORE
Page 3 and 4: A Great Year The year 2007 has been
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Page 7 and 8: New proactive organization On July
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Page 11 and 12: We met Didier Dubuis in the middle
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Page 15: Key customers choose Valmet THIRTY
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