28th Annual WMI Workshop on Design, Operation and Maintenance of Saws and Knives WMI Workshop on Design, Operation and Maintenance of Saws and Knives

28th Annual WMI Workshop on Design, Operation and Maintenance of Saws and Knives

2016 WORKSHOP: September 26-27, 2016

Holiday Inn - Portland Airport
8439 NE Columbia Blvd, Portland, OR 97220
Tel: 800-315-2621 or 503-256-5000 direct


Monday, September 26, 2016

7:45 - 8:00

8:00 - 8:10
Welcome and Introduction
Ryszard Szymani, Director, Wood Machining Institute (WMI), Berkeley, CA

8:10 - 8:30
Latest Developments in Wood Processing Machines and Cutting Tools
Ryszard Szymani  
Latest developments to be discussed include: EWD New Active Guiding System - Flying Bandsaw Technology; WaneShear Edger; Mohringer/Canali thin kerf bandsaw blade with saw kerf of 0.4mm; New RoboSharp Machine; iBlade® -- The Tool Intelligence Update.

8:30 - 9:00
Wood Characteristics and Properties that are of Concern when Cutting and Rupture Patterns in Wood Cutting
Ryszard Szymani  
Review of the basic anatomical, physical and mechanical characteristics and properties of wood as they relate to sawing, chipping and lumber planing process will be presented along with variation in specific gravity of wood and cutting forces during rip-sawing and cross cutting. Also presented will be the effect of spiral and interlocked grain, knots, growth and wood drying stresses on saw stability and sawing accuracy, surface quality during planing and the workpiece feed rate.

9:00 - 9:40
Economics of Sawing Variation and Potential Gains in Lumber Value and Volume Recovery Using Thin Kerf Accurate Sawing and On-line Saw Stability Control
Ryszard Szymani  
The value of kerf and target size reduction will be discussed and examples of thin kerf accurate sawing and on-line saw stability, workpiece feed rate, and sawing accuracy control will be presented. In order to reduce sawing variation you have to first quantify process and product variation. Using integrated planning and an optimizing system for sawing the logs into lumber grades according to the end user specific needs, it is possible to increase the sales value of the production by several percent according to one study in Finland.

9:40 - 10:10
Morning Coffee Break and Networking Opportunity

10:10 - 11:00
How Improved Steel Quality Helps to Produce Better Sawblades and Knives
Stefan Hilgenstock, Technical Director and Director Quality Control for the BESTAR Steel Group, Remscheid, Germany 
We all deal with this basic material on a daily basis, but still sometimes scratch our head about why steel behaves the way it does - even considering ideal conditions. The final result in any tool can be different. Stefan will explain the finer points of steel manufacturing as it relates to the manufacture of saw blades and knives, what makes BESTAR's steel different/better than its competitors, and how starting with the right quality of steel can help you to produce a better and more cost effective blade.

11:00 - 12:00
Saw Stiffness and Instability Criteria, CSAW, SAWSEL and SETS Software and Advances in Saw Tensioning and Tension Evaluation
Ryszard Szymani  
This presentation provides a summary of advances in research and developments on thin circular and band saw stiffness and stability control, which apply to problems such as unstable or "snaking" saws. It will include a DVD demonstrating the condition of saw vibration and critical speed and a CSAW program for calculation of critical speed. It will also provide a brief description of SAWSEL and SETS software. The second part reviews developments in saw automatic leveling and tensioning methods and the latest equipment used for saw stiffness evaluation.

12:00 - 1:15
Lunch with Workshop Faculty Provided

1:15 - 2:10
Getting More Out of Your Sawing Process through Innovations in Saw Design
Warren M. Bird, California Saw and Knife Works, LLC., Sutherlin, OR (Past President of California Saw and Knife Works, Inc., San Francisco, CA)  
As new circular saw design focuses on improving sawing accuracy. Reduction in wedging and offset is the principal objective, rather than smaller kerf. Case histories will be presented to demonstrate how important gains have been achieved, without sacrifice of productivity.

Effect of Counter and Climb Cutting on Wood Dimensional Accuracy of Guided Circular Saws
Gary Schajer, Professor, UBC Dept. of Mechanical Engineering, Vancouver, B.C., Canada 
The choice of counter or climb cuttting is particularly important when using guided saws. Experimental results will be show to demonstrate and quantify the increase in cutting accuracy that can be achieved by using climb cutting. However, climb cutting is more demanding on wood infeed systems and care must be taken to hold the wood securely to avoid throw-out.

3:00 - 3:20
Refreshment break and Networking Opportunity

3:20 - 4:15
Analysis of Sawing Accuracy in Single Arbor and Double Arbor Machines with Guided Circular Saws
Warren M. Bird, California Saw and Knife Works, LLC., Sutherlin, OR (Past President of California Saw and Knife Works, Inc., San Francisco, CA)  
Standard statistical methods are problematic when applied to single- and double-arbor gang edgers using guided saws. Board measurements in both types of machines are presented to illustrate these problems. Single arbor wedging and double arbor offset are the dominant causes of planer skip and grade loss in these machines. A straightforward analysis of wedging and offset measurements is presented.

4:15 - 4:30
Question and Answer Session



Tuesday, September 27, 2016

8:00 - 9:00
An Update on Saw Tooth and Gullet Design, Gullet Loading and Feed Rate and Formation of Gullet Cracks in Saws and How to Avoid Them
Ryszard Szymani  
Gullet cracks in saws have been a subject of many publications, particularly by saw steel and saw blade manufacturers. There have been improvements in saw steel manufacture as well as in equipment for saw tipping with Stellite and tungsten carbide tips and saw sharpening. This presentation updates information on the current status of gullet cracks in circular and band saws and how it is possible to avoid them through application of proper sharpening.

9:00 - 10:00
Survey of Some Recent Techniques to Improve Cutting Tool Performance
Thomas J. Walz, President, Northwest Research Institute, Inc.
Carbide Processors, Inc., Tacoma, WA  
This presentation will cover: The use, application and economics of advanced materials for cutting tools; Ramifications of machine coolant maintenance; Seventeen considerations for analyzing cutting tool wear; European standards for brazing material purity; Economics and availability of new sources for cutting tool materials and Peer to peer communication on the operations level.

10:00 - 10:30
Break and Networking Opportunity

10:30 - 11:30
Chipping Heads and Knives in the Sawmill/Planer Mill
Devin Karamanos, Vice President, Sales & Services for Western North America, Key Knife, Inc., Tualatin, OR  
The presentation will include a number of topics concerning the use of chipping heads in sawmills. The proper setup of chipping heads (RPM, knife speeds, etc.) and the increased use of the solid-style chipping heads will be discussed. Finally, the Key Knife disposable knife system for planer heads and the advantages they can bring to the dry-end operations will be presented.

11:30 - 12:00
Questions and Answers
Ryszard Szymani, Thomas J. Walz, Devin Karamanos,  

12:00 - 1:15
Lunch with Workshop Faculty Provided

1:15 - 2:00
Technologically Advanced Saw Maintenance Equipment from Iseli
Michael F. Pickard, President / CEO, York Saw & Knife Co., Inc., York, PA
The presentation will provide an overview on the state of the art saw maintenance equipment manufactured by Iseli & Co. AG, Switzerland for both circular and band saws. Machinery overview and discussions will include bandsaw grinders, automatic leveling and tensioning machines, stellite tipping machines, dual side grinders, automatic swaging and shaping machines, and automatic carbide and stellite circular saw grinding machines. Presentation will include a metallurgical analysis of the advantages of utilizing flood cooled CNC controlled grinding equipment vs. conventional cam operated dry grinders for sharpening bandsaw teeth on both swaged and stellite teeth as well as the advantages of utilizing automatic leveling, tensioning, swaging and shaping of bandsaw teeth.

2:00 - 2:45
Saw Guides: A Journey into Knowing More About the Micrometer of Your Sawmill

Udo Jahn, General Manager, Modern Engineering, Delta BC, Canada  
This presentation will cover: A brief history in the evolution of Sawguides and the materials they are made from - Aluminum Sawguides and their benefits - Understanding Anodizing and the different types - Steel Sawguides and their benefits - Different coatings available for Steel Sawguides - Accuracy of Sawguides and its importance - Babbitt pads; What is important about them? - Analyzing and Identifying problems with Sawguides.

2:45 - 3:00
Break and Networking Opportunity

Safety and Ergonomic Issues in the Wood Industry: Review of Causes of Accidents in Sawmills and Planer mills and How They Can Be Avoided
Ryszard Szymani  
The presentation will include information on safety issues and hazard analysis during saw maintenance as well as safety and ergonomic issues for sawmill and planer-mill equipment operators. Also included will be examples of accidents during operation of band mills and board edgers, curve sawing gang saws and during trim saw and conveyor operation and maintenance following proper LOTO procedures as well as their causes and how they could have been avoided. This presentation is based on 37 years of experience in accident investigation in the primary and secondary wood industry and serving as a Safety Specialist on the ANSI 01.1 Committee on Safety Requirements for Woodworking Machinery (1983-1997 and 2012-2013).

4:00 - 4:30
Questions and Answer Session
Ryszard Szymani

Presentation of Certificates & Adjorn
Ryszard Szymani


Wood Machining Institute
P.O. Box 476
Berkeley, CA 94701 USA
Tel & Fax: 1-925-943-5240; Cell: 1-925-360-4201
e-mail: szymani@woodmachining.com