A t raining and op timization system for log saw ing
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T O P S A W. A T raining and OP timization System for Log SAW ing. Sun Joseph Chang School of Renewable Natural Resources Louisiana State University Agricultural Center Baton Rouge, LA 70803 . Defect Identification on Cross-sectional Views. Results of Replication of Log #3.

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A t raining and op timization system for log saw ing

T O P S A W

A Training and OPtimization System for Log SAWing

Sun Joseph Chang

School of Renewable Natural Resources

Louisiana State University Agricultural Center

Baton Rouge, LA 70803






Challenges for the internal defect based sawing optimization system
Challenges for the Internal Defect Based Sawing Optimization System

  • Hardware: A fast, more powerful, strong, durable, and low cost scanner

  • Software: A fast optimization software



Optimal cutting sequence
Optimal Cutting Sequence time optimization software has been developed

  • Cut No. Thickness Volume Grade Value (in inches) (in board feet) ($)

  • 1 4/4 6.5 1C 4.00

  • 2 5/4 12.9 FAS 12.77

  • 3 6/4 17.4 1C 14.09

  • 4 8/4 26.0 1C 21.73

  • 5 6/4 20.0 1C 16.26

  • 6 6/4 18.8 1C 15.21

  • 7 5/4 14.3 FAS 15.54

  • 8 6/4 13.4 FAS 15.31

  • 9 4/4 5.4 1C 3.31

    • Total Volume 134.8 BF Total Value $118.22


Results related to log 3
Results related to Log #3 time optimization software has been developed

  • Sawmill production: $66.29

  • TOPSAW replication: $64.57

  • TOPSAW simulation: $91.32

    (+ 37.8% over sawmill production)

  • TOPSAW optimization: $118.22 (+29.5% over simulation, +78.3% over sawmill production)


A comparison between live sawing optimization and sawmill production
A comparison between live sawing optimization and sawmill production

  • Log Live sawing Sawmill

  • Optimization Production

  • Log 1 $92.35 $84.20

  • Log 2 $94.97 $69.91

  • Log 3 $118.22 $66.29

  • Log 5 $100.48 $64.81

  • Log 6 $74.25 $32.42

  • Log 7 $45.23 $59.44

  • Log 8 $63.23 $41.81

  • Average Gain 40.5%


A comparison between live sawing and bi directional sawing optimization
A Comparison between Live Sawing and Bi-directional Sawing Optimization

  • Log Live Sawing Bi-directional Sawing

  • Optimization Optimization

  • Log 1 $92.35 $93.94

  • Log 2 $94.97 $107.7

  • Log 3 $118.22 $122.73

  • Log 5 $100.48 $107.9

  • Log 6 $74.25 $74.8

  • Log 7 $45.23 $53.6

  • Log 8 $63.23 $71.3

  • Average gain of bi-directional over live sawing 7.3%


Why we need topsaw
Why we need TOPSAW Optimization

  • Log cost accounts for about 60% of the hardwood lumber production cost based on the data of the 1997 Census of Manufactures



Only the paranoid survives
Only the Paranoid survives significant gain in lumber revenue and mill profit

  • Our competitors also recognize that, particularly our Canadian friends up north.


Only the paranoid survives1
Only the Paranoid Survives significant gain in lumber revenue and mill profit

  • Canadian softwood sawmills already have an edge over their U.S. counterparts.

  • Despite a 27% import tariff, Canadian softwood sawmills can still undercut domestic producers in the US market.


  • In terms of significant gain in lumber revenue and mill profithardwoods, over the last 10 years, US hardwood log exports doubled and Canada’s share of the export increased from 59% to 70%. As a result, more than ever US hardwood logs are sawn into lumber in Canada.




Hardwood sawing technology center
Hardwood Sawing Technology Center make TOPSAW a reality, and regain the competitive edge.

Goal:

To commercialize TOPSAW in 3-4 years

Objectives:

  • Develop a $5-600,000 per unit CT log scanner

  • Refine the optimization software

  • Develop a log set-up system to accurately and quickly orient and position the log for sawing


  • Cost over 4 years make TOPSAW a reality, and regain the competitive edge.

  • With sawmill equipments

    $3.5 million

  • Without sawmill equipments

    $2.5 million


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