Stamenkoska, Ana-marija
Preferred name
Stamenkoska, Ana-marija
Official Name
Stamenkoska, Ana-marija
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Item type:Publication, Evaluation of Processing Time in Primary Sawmilling of Scots Pine (Pinus sylvestris) Logs on a Vertical Band Saw(Department of Wood Technology, Faculty of Forestry and Wood Tehnology, University of Zagreb, Croatia, 2025); ; ; ; The efficiency of primary wood processing largely depends on the optimal utilization of macines and tools. Beyond the rational use of sawlogs in sawmilling, the profitability and effective operation of sawmill capacities critically rely on the efficient application of primary processing machines. These machines are primarily tasked with transforming logs into semi-finished products, through which logs are converted into sawn timber through the sawing process. Among the most implemented machines for primary processing are band saws. These types of primary machines allow individual log sawing, where each log is processed separately according to its dimensions and quality class. In such operations, determining the technological capacity is essential, defined as the volume of logs a machine can process within a given timeframe. A key factor affecting technological capacity is the processing time per log, which represents the cumulative duration of all sawing operations and factors involved in sawing , such as log rotation, number of cuts, log length and other related activities. The processing time can be divided into components dependent on the machine’s technological parameters and those influenced by the organization of production within the sawmill. This study presents a detailed analysis of processing times for Scots pine (Pinus sylvestris) sawlogs using a vertical band saw. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Impact of Length and Diameter Variations in Beech (Fagus sylvatica L.) Sawlogs on the Yield and Waste(Faculty of Design and Technologies of Furniture and Interior - Skopje, 2024-12); ; ; ; This study evaluates the yield and waste distribution in beech (Fagus sylvatica L.) sawlogs, focusing on the influence of log length and diameter. Two log lengths, 4.0 m and 5.0 m, were analysed across various diameter classes. The research examines the relationship between log geometry and the quantitative utilisation of raw materials, emphasising the impact on sawn timber yield, coarse waste, fine waste, and shrinking allowance. Experimental sawings were conducted on a vertical bandsaw in a saw mill optimised for moderate-capacity production. Statistical analysis of the data reveals significant differences in yield efficiency between the two log lengths. Logs with shorter lengths (4.0 m) demonstrated lower quantitative yield compared to longer logs (5.0 m) due to reduced taper effects and enhanced sawmill processing efficiency. Similarly, larger diameters were correlated with increased sawn timber yield, whereas smaller diameters resulted in higher proportions of waste. The waste distribution analysis highlighted that coarse waste formed the largest component, followed by fine waste, both influenced by log dimensions and quality. Precision in sawmill operations was demonstrated by the diminishing allowance, which provided a small but constant proportion to all logs. The findings underscore the importance of optimising log selection and processing parameters to maximise resource efficiency and minimise waste. This study provides insights into sustainable practices in beech sawlog processing, supporting the development of optimised sawing techniques for improved material utilisation. The results contribute to a better understanding of how log characteristics impact industrial processing outcomes, informing decision-making for sawmill operations and forest management strategies.