Marty Schlosser & Philip Dube Wood Dust & Chips Management Marty Schlosser & Philip Dube

Overview - Introduction - Importance of Dust & Chips Management - Physics - Dust Management – A Systemic Approach - Bringing it All Together - Q&A

References Bill Pentz: “Dust Control Made Simple” by http://billpentz.com/woodworking/cyclone/ “Dust Control Made Simple” by Sandor Nagyszalanczy Marty’s Article on Cyclone DC for Small Shop: https://www.canadianwoodworking.com/tipstechnique s/cyclone-dust-collection-small-shop

Overview - Introduction - Importance of Dust & Chips Management - Physics - Dust Management – A Systemic Approach - Bringing it All Together - Q&A

Importance Wood dust (.5 – 2.5 microns) & Chips are a health & safety hazard Workplace Exposure Limits: .1 milligrams per cubic meter (mg/m3) .5 mg/m3 (8-hour time-weighted average, total inhalable dust)

Importance (cont’d) Lungs: Nose: Eyes: Skin: Asthma; Lung function impairment & Extrinsic allergic alveolitis (disease with flu-like symptoms) Nose: Rhinitis (runny nose), Violent sneezing, Blocked nose, Nose bleeds, Nasal cancer (very rarely) Eyes: Soreness, Watering, Conjunctivitis (pink eye) Skin: Allergic reactions, Irritation, Sensitisation dermititis

Importance (cont’d) Workplace Hazards and Concerns: Unsafe footing: dusty floors Increased fire & explosion risk Machines: Overheat: poor air circulation Perform less efficiently: chip clogging Insurance Policy Considerations

Overview - Introduction - Importance of Dust & Chips Management - Physics - Dust Management – A Systemic Approach - Bringing it All Together - Q&A

Physics – Moving Dust & Chips Air Velocity Required = 4,000 FPM ( ~ 45 MPH ) Air Volume (CFM) Required = 1,000 CFM

Physics – Moving Dust & Chips Static Pressure (SP) Affected by: > Filter > Ducting**, including: Elbows Wyes Gates Flex Hoses > Machine’s dust hood & connection ** SP Greater in Smaller Ducting!

Fan Curve Example

Overview - Introduction - Importance of Dust & Chips Management - Physics - Dust Management – A Systemic Approach - Bringing it All Together - Q&A

Dust Management – Systematic Approach Three Commandments of Dust Management Collect Dust and Chips at Source Limit Resistance (Static Pressure (SP)) Establish & Maintain Air Velocity Regarding point #3, this includes pre-filtering with a cyclone and proper maintenance of your system. See Tommy Mac from Rough Cuts video: https://www.youtube.com/watch?v=Kuxgy9KYAUY There is also the option to introduce a Thein Baffle (https://www.youtube.com/watch?v=RpUbhA-6fbM) in lieu of a cyclone. It’s not as effective, but is undoubtedly better than having no pre-separation capability.

Types of DC Systems Fixed (Ducted to Main Machines) Moveable Hybrid

Single-Stage DC Fixed or Moveable

Two-Stage DC Fixed (Mounted on a Stand)

Two-Stage DC Movable

Add-on Cyclone Separator https://www.youtube.com/watch?v=8v5079FPCsY

Adding a Thien Separator Video describing making and installing a Thien separator: https://www.youtube.com/watch?v=RpUbhA-6fbM Video comparing Thien to Cyclone: https://www.youtube.com/watch?v=HaTrY-O7l5E

Shop Vacs Connecting to Small Machines General Shop Vacuuming Chores Cyclone Pre-separator maintains Filter Performance

Dust pick-up for “Culprits”

Festool’s Router Dust Pick-up Oneida’s Router Dust Pick-up  Rockler’s Router Dust Pick-up

Downdraft Table Youtube Video: https://www.youtube.com/watch?v=eOhG0L6_XVI

Ceiling-mounted Air Purifiers Reduce ambient dust floating around shop Commerical units available… but you can make one for less than $40: https://www.youtube.com/ watch?v=kH5APw_SLUU

Dust Masks – Personal Protection Fibre Filter Half-face Mask Full-face Mask 

Overview - Introduction - Importance of Dust & Chips Management - Physics - Dust Management – A Systemic Approach - Bringing it All Together - Q&A

Bringing it all Together Budget & Workshop dictate Approach Maximize: Dust Ports & Hoods Connectors Ducting Layout Use Second-party Validated HEPA Filters

Custom-fitted Ducting Connector Ideas Molding PVC piping to make your own connectors: https://www.youtube.com/watch?v=ugUZYmrqejs Rob Cosman’s bandsaw connector: https://www.youtube.com/watch?v=Ut_tqnqrRww Dust Collection on the Cheap: https://www.youtube.com/watch?time_continue=242&v= xpYGzJU6R8Y

Shop Built Hoods

Gates sized to “Connectors”

Non-Ducted Shop Provide Quick-disconnect Hose Connectors: Schedule 40 PVC Rockler, etc.

Ducted Shop Locate DC & layout Duct System to limit SP https://www.oneida- air.com/static.asp?htmltemplate=static/ductwork_tutorial 01.html Foil tape Joints

Validate System Performance: Air Velocity (CFM) Anemometer: - Measure air velocity - Relatively inexpensive ($19 +)

Validate System Performance: Air Quality

Overview Q&A - Introduction - Importance of Dust & Chips Management - Physics - Dust Management – A Systemic Approach Bringing it All Together Q&A

Marty Schlosser & Philip Dube Wood Dust & Chips Management Marty Schlosser & Philip Dube