The Experts below are selected from a list of 192 Experts worldwide ranked by ideXlab platform
Guang Feng Chen - One of the best experts on this subject based on the ideXlab platform.
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Yarn Feeding Compensation Algorithm and Implementation for Needbar Transverse Shifting of Carpet Tufting Machine
Advanced Materials Research, 2011Co-Authors: Guang Feng Chen, Wei Bin Wang, Hao Chun SunAbstract:The needle bar transverse shifting will likely form the stop mark liked gap on the tufted carpet. This paper proposed the yarn Feeding compensation scheme and illustrate implement method in detail. Through analysis the change in yarn Feeding path and loop pile forming of carpet tufting machine, construct the mathematical model of length change of yarn Feeding in path and usage of loop pile forming while needle bar shifting. According to the mathematical model for yarn Feeding compensation, calculate the additional yarn Feeding requirement. Base on jacquard control principle, dynamic control the yarn Feed actuator to drive the yarn Feed Roller to delivery additional length yarn, and produce loop pile with predefined pile height, Test result show the compensation is feasible.
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MVHI - Implementation of shift compensation for servo clutch based carpet tufting machine
2010 International Conference on Machine Vision and Human-machine Interface, 2010Co-Authors: Guang Feng Chen, Zhijun Sun, Weibin Wang, Zhuo MengAbstract:Due to increment yarn usage in loop pile forming and the yarn Feeding path length change in needle bar transverse shifting, the tufting process would form the stop mark liked gap on the carpet. Previous study set up the mathematical model of length change of yarn Feeding in path and usage of loop pile forming while needle bar shifting. This paper intends to propose the implement of previous algorithm on the servo-clutch based tufting carpet machine with cam based transverse mechanism. Base on the jacquard control logic and yarn compensation mathematical model, implement the half-period yarn Feed compensation on the tufting carpet machine. According to mathematical model calculate the additional yarn Feeding requirement, dynamic control of servo motor to drive the yarn Feed Roller to delivery additional length yarn, and produce the loop pile with predefined pile height.
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MVHI - Shift compensation algorithm for servo-clutch based carpet tufting machine
2010 International Conference on Machine Vision and Human-machine Interface, 2010Co-Authors: Guang Feng Chen, Zhijun Sun, Zhilei Jin, Yize SunAbstract:The needle bar transverse mechanisms are widely used in carpet tufting machine. Due to more yarn usage in loop pile forming and the yarn Feeding path length change, the needle bar transverse shifting will likely form the stop mark liked gap on the carpet. Focus on this problem, through analysis the change in yarn Feeding path and loop pile forming, construct the mathematical model of length change of yarn Feeding in path and usage of loop pile forming while needle bar shifting. Base on the mathematical model, together with the time sequence analysis of loop forming and needle bar transverse shift, propose two compensation methods named full-period and half-period compensation. According to mathematical model calculate the additional yarn Feeding requirement, dynamic control the yarn delivery mechanism to drive the yarn Feed Roller to delivery additional length yarn, and produce the loop pile with predefined pile height.
Jaco-pierre Van Der Merwe - One of the best experts on this subject based on the ideXlab platform.
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The impact of log surface damage caused by harvester Eucalyptus debarking on pulp value recovery
Southern Forests, 2017Co-Authors: Jaco-pierre Van Der Merwe, Reino Pulkki, Pierre Ackerman, Dirk LänginAbstract:Mechanised harvesting operations are growing in popularity in South Africa, as motor-manual and manual harvesting operations pose significant health and safety risks to workers. Potential damage inflicted by single-grip harvester Feed Rollers and delimbing knives on the log surface during debranching and debarking of eucalypts may affect chip size distributions during chip production. Chip size is important as it influences pulp quality and recovery in the kraft pulping process. The study investigated the influence of two mechanised debarking treatments in eucalypts (three Feed Roller passes and five Feed Roller passes along the stem surface) with Feed-Roller-induced log surface damage on pulp value recovery. The two mechanised treatments were compared against chips produced from manually debarked logs with no surface damage. In addition, the effect of two log drying periods (one week and two weeks) and three log classes (base, middle and top logs) on chip quality were also analysed. An economic evaluatio...
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The impact of mechanical log surface damage on chip size uniformity during debranching and debarking Eucalyptus pulpwood logs using a single-grip harvester
Southern Forests, 2016Co-Authors: Jaco-pierre Van Der Merwe, Reino Pulkki, Pierre Ackerman, Dirk LänginAbstract:Mechanised harvesting operations are becoming more prevalent in South Africa with the realisation that motormanual and manual harvesting operations pose significant health and safety risks to workers. The damage inflicted by single-grip harvester Feed Rollers and delimbing knives on log surfaces during debranching and debarking eucalypts, may affect eventual chip quality. Chip quality influences pulp quality and recovery in the kraft pulping process. This study investigates the influence of two mechanised debranching and debarking treatments on Eucalyptus pulp logs (threeand five-Feed Roller passes along the stem surface) by Feed Rollers and delimbing knives on chip uniformity, size and purity. The two mechanised treatments to three log classes (base, middle and top logs) were compared with chips produced from manually debarked logs. Manually debarked logs produced significantly less undesirable-sized chips than both three and five-pass processed logs. The volume of undesirablesized chips produced during ...
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Fibre losses during debranching and debarking of Eucalyptus pulp logs using a single-grip harvester
Southern Forests, 2015Co-Authors: Jaco-pierre Van Der Merwe, Reino Pulkki, Pierre AckermanAbstract:Mechanised harvesting operations are becoming more prevalent in South Africa, with the realisation that motor- manual and manual harvesting operations pose significant health and safety risks to workers. However, the potential damage caused by single-grip harvester Feed Rollers and delimbing knives on the log surface during debranching and debarking of eucalypts pulp logs may negatively affect fibre recovery as opposed to manually debarked logs, which show little or no log surface damage. Compared with manual debarking, this study investi- gated the influence of two mechanised debarking treatments on wood fibre loss on eucalypt log assortments debarked by harvester head Feed Rollers and delimbing knives. The two mechanised debarking treatments consisted of three and five Feed Roller passes along the stem surface. In addition to quantifying the magnitude of this fibre loss, a financial evaluation was done to calculate the value of these losses. The three- and five-pass debarking treatments caused significa...
Dirk Längin - One of the best experts on this subject based on the ideXlab platform.
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The impact of log surface damage caused by harvester Eucalyptus debarking on pulp value recovery
Southern Forests, 2017Co-Authors: Jaco-pierre Van Der Merwe, Reino Pulkki, Pierre Ackerman, Dirk LänginAbstract:Mechanised harvesting operations are growing in popularity in South Africa, as motor-manual and manual harvesting operations pose significant health and safety risks to workers. Potential damage inflicted by single-grip harvester Feed Rollers and delimbing knives on the log surface during debranching and debarking of eucalypts may affect chip size distributions during chip production. Chip size is important as it influences pulp quality and recovery in the kraft pulping process. The study investigated the influence of two mechanised debarking treatments in eucalypts (three Feed Roller passes and five Feed Roller passes along the stem surface) with Feed-Roller-induced log surface damage on pulp value recovery. The two mechanised treatments were compared against chips produced from manually debarked logs with no surface damage. In addition, the effect of two log drying periods (one week and two weeks) and three log classes (base, middle and top logs) on chip quality were also analysed. An economic evaluatio...
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The impact of mechanical log surface damage on chip size uniformity during debranching and debarking Eucalyptus pulpwood logs using a single-grip harvester
Southern Forests, 2016Co-Authors: Jaco-pierre Van Der Merwe, Reino Pulkki, Pierre Ackerman, Dirk LänginAbstract:Mechanised harvesting operations are becoming more prevalent in South Africa with the realisation that motormanual and manual harvesting operations pose significant health and safety risks to workers. The damage inflicted by single-grip harvester Feed Rollers and delimbing knives on log surfaces during debranching and debarking eucalypts, may affect eventual chip quality. Chip quality influences pulp quality and recovery in the kraft pulping process. This study investigates the influence of two mechanised debranching and debarking treatments on Eucalyptus pulp logs (threeand five-Feed Roller passes along the stem surface) by Feed Rollers and delimbing knives on chip uniformity, size and purity. The two mechanised treatments to three log classes (base, middle and top logs) were compared with chips produced from manually debarked logs. Manually debarked logs produced significantly less undesirable-sized chips than both three and five-pass processed logs. The volume of undesirablesized chips produced during ...
Pierre Ackerman - One of the best experts on this subject based on the ideXlab platform.
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The impact of log surface damage caused by harvester Eucalyptus debarking on pulp value recovery
Southern Forests, 2017Co-Authors: Jaco-pierre Van Der Merwe, Reino Pulkki, Pierre Ackerman, Dirk LänginAbstract:Mechanised harvesting operations are growing in popularity in South Africa, as motor-manual and manual harvesting operations pose significant health and safety risks to workers. Potential damage inflicted by single-grip harvester Feed Rollers and delimbing knives on the log surface during debranching and debarking of eucalypts may affect chip size distributions during chip production. Chip size is important as it influences pulp quality and recovery in the kraft pulping process. The study investigated the influence of two mechanised debarking treatments in eucalypts (three Feed Roller passes and five Feed Roller passes along the stem surface) with Feed-Roller-induced log surface damage on pulp value recovery. The two mechanised treatments were compared against chips produced from manually debarked logs with no surface damage. In addition, the effect of two log drying periods (one week and two weeks) and three log classes (base, middle and top logs) on chip quality were also analysed. An economic evaluatio...
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The impact of mechanical log surface damage on chip size uniformity during debranching and debarking Eucalyptus pulpwood logs using a single-grip harvester
Southern Forests, 2016Co-Authors: Jaco-pierre Van Der Merwe, Reino Pulkki, Pierre Ackerman, Dirk LänginAbstract:Mechanised harvesting operations are becoming more prevalent in South Africa with the realisation that motormanual and manual harvesting operations pose significant health and safety risks to workers. The damage inflicted by single-grip harvester Feed Rollers and delimbing knives on log surfaces during debranching and debarking eucalypts, may affect eventual chip quality. Chip quality influences pulp quality and recovery in the kraft pulping process. This study investigates the influence of two mechanised debranching and debarking treatments on Eucalyptus pulp logs (threeand five-Feed Roller passes along the stem surface) by Feed Rollers and delimbing knives on chip uniformity, size and purity. The two mechanised treatments to three log classes (base, middle and top logs) were compared with chips produced from manually debarked logs. Manually debarked logs produced significantly less undesirable-sized chips than both three and five-pass processed logs. The volume of undesirablesized chips produced during ...
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Fibre losses during debranching and debarking of Eucalyptus pulp logs using a single-grip harvester
Southern Forests, 2015Co-Authors: Jaco-pierre Van Der Merwe, Reino Pulkki, Pierre AckermanAbstract:Mechanised harvesting operations are becoming more prevalent in South Africa, with the realisation that motor- manual and manual harvesting operations pose significant health and safety risks to workers. However, the potential damage caused by single-grip harvester Feed Rollers and delimbing knives on the log surface during debranching and debarking of eucalypts pulp logs may negatively affect fibre recovery as opposed to manually debarked logs, which show little or no log surface damage. Compared with manual debarking, this study investi- gated the influence of two mechanised debarking treatments on wood fibre loss on eucalypt log assortments debarked by harvester head Feed Rollers and delimbing knives. The two mechanised debarking treatments consisted of three and five Feed Roller passes along the stem surface. In addition to quantifying the magnitude of this fibre loss, a financial evaluation was done to calculate the value of these losses. The three- and five-pass debarking treatments caused significa...
Zhuo Meng - One of the best experts on this subject based on the ideXlab platform.
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MVHI - Implementation of shift compensation for servo clutch based carpet tufting machine
2010 International Conference on Machine Vision and Human-machine Interface, 2010Co-Authors: Guang Feng Chen, Zhijun Sun, Weibin Wang, Zhuo MengAbstract:Due to increment yarn usage in loop pile forming and the yarn Feeding path length change in needle bar transverse shifting, the tufting process would form the stop mark liked gap on the carpet. Previous study set up the mathematical model of length change of yarn Feeding in path and usage of loop pile forming while needle bar shifting. This paper intends to propose the implement of previous algorithm on the servo-clutch based tufting carpet machine with cam based transverse mechanism. Base on the jacquard control logic and yarn compensation mathematical model, implement the half-period yarn Feed compensation on the tufting carpet machine. According to mathematical model calculate the additional yarn Feeding requirement, dynamic control of servo motor to drive the yarn Feed Roller to delivery additional length yarn, and produce the loop pile with predefined pile height.