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Line 15: − Based on the following, approximately 35% of airborne dust (by weight) generated by cutting oak is in the 1 to 10 micron range.+ − http://en.wikipedia.org/wiki/File:Particle_size_distribution_of_hardwood_dust.jpg+ + + + + Line 48:
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Line 124: − 4" ports − 6" ports − − 10% will be added for unanticipated expenses. − − 5% discount from Clearvue − − $600 allocated for dust collection from the Shopbot vote. − − Total $4004 Line 156:
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Wood Shop Dust Collection (view source)
Revision as of 19:34, 8 February 2015
, 19:34, 8 February 2015→Down Drops: add link to sawstop modification
== History ==
== History ==
* 2014-05-xx - Discussion open on member list
* 2014-05-22 - Discussion open on member list
* 2014-xx-xx - Announced
* 2014-05-27 - Announced
* 2014-xx-xx - Vote
* 2014-06-02 - Vote
== Background ==
== Background ==
== Do we produce enough dust for it to be a problem? ==
== Do we produce enough dust for it to be a problem? ==
A single ripping cut with a thin kerf blade of 5/4 oak plank 8' long will create 10 grams of <15 micron dust. If distributed evenly throughout the shop, this would create a dust concentration of 9.1 mg/m**3, much greater than the ACGIH hardwood limit of 1.0 mg/m**3. In addition, fine dust is difficult to remove. When it finally settles, sweeping causes much of the dust to again become airborne. Vacuuming is only effective when using a fine filter. So the fine dust tends to accumulate, bringing the airborne dust levels higher and higher.
Calculation: https://docs.google.com/spreadsheets/d/18togRk2AZD1RfjSE-m5PjONLy_UOMeJCfzvsSp8gQTg/edit?usp=sharing
10% of dust (by volume) generated by sawing oak consists of particles smaller than 15.1 microns.
10% of dust (by volume) generated by sawing oak consists of particles smaller than 15.1 microns.
http://annhyg.oxfordjournals.org/content/44/6/455.full.pdf
http://annhyg.oxfordjournals.org/content/44/6/455.full.pdf
Approximately 1/3 of this is < 10 micron.
Approximately 1/3 of this is < 10 micron.
This is an interesting graph showing the distribution of particle sizes created by various woodworking operations.
http://en.wikipedia.org/wiki/File:Particle_size_distribution_of_hardwood_dust.jpg
== Particle Monitoring ==
== Particle Monitoring ==
== Ducting ==
== Ducting ==
6" PVC sewer & drain pipe for drops
6" PVC solid core sewer & drain pipe for drops
8" PVC sewer & drain pipe for main lines
8" PVC solid core sewer & drain pipe for main lines
== Down Drops ==
== Down Drops ==
down drops:
down drops:
* SawStop table saw
* SawStop table saw (consider this mod: http://www.sawmillcreek.org/showthread.php?72133-Changed-Sawstop-DC-port-to-6-inch)
* ShopBot CNC router
* ShopBot CNC router
* Delta 14" bandsaw, router table
* Delta 14" bandsaw, router table
== Automating this stuff ==
== Automating this stuff ==
Initially, the dust collector will be turned on and off manually and the blast gates will be opened manually. After all the wood working machines are connected to the dust collector, we will work to automate the gates and collector motor - turning on a tool will activate the collector.
Initially, the dust collector will be turned on and off manually and the blast gates will be opened manually. After all the wood working machines are connected to the dust collector, we will work to automate the gates and collector motor - turning on a tool will activate the collector. https://wiki.pumpingstationone.org/File:Blast_gate_back.svg https://wiki.pumpingstationone.org/File:Blast_gate_front.svg
== Wood Working Machine Collection Strategies ==
== Wood Working Machine Collection Strategies ==
See spreadsheet for cost details: https://docs.google.com/spreadsheets/d/1DEpszf0J_o_FLTqVH8XopYjlOpG-GloZYVA1FlCf_E8/edit?usp=sharing
See spreadsheet for cost details: https://docs.google.com/spreadsheets/d/1DEpszf0J_o_FLTqVH8XopYjlOpG-GloZYVA1FlCf_E8/edit?usp=sharing
Clearvue CVMAX 3 phase with nano filters
Clearvue CVMAX 3 phase with nano filters
Filter clean out box
Filter clean out box
round fiber drum
round fiber drum (at the base of the cyclone. stores chips & coarse dust)
Dylos DC1100-PRO-PC air quality monitor
Dylos DC1100-PRO-PC air quality monitor
For each down drop (5 total):
For each down drop (5 total):
* 8x8x6 45 DWV PVC wye https://www.plumbersstock.com/product/10258/8inx8inx6in-pvc-sdr35-wye/ (verify this supplier before relying on it.) alternative: http://www.nibco.com/Fittings/Plastic-Fittings/PVC-DWV-Fittings/4810-45-Wye-H-x-H-x-H-PVC-DWV/
* 8x8x6 45 DWV PVC wye https://www.plumbersstock.com/product/10258/8inx8inx6in-pvc-sdr35-wye/ (verify this supplier before relying on it.) alternative: http://www.nibco.com/Fittings/Plastic-Fittings/PVC-DWV-Fittings/4810-45-Wye-H-x-H-x-H-PVC-DWV/
* 6" 45 DWV PVC elbow $8 each http://www.lowes.com/pd_1824-676-6P03_4294765362__?productId=3452924&Ns=p_product_qty_sales_dollar|1&pl=1¤tURL=%3FNs%3Dp_product_qty_sales_dollar%7C1&facetInfo=
* 6" 45 DWV PVC elbow $8 each http://www.lowes.com/pd_1824-676-6P03_4294765362__?productId=3452924&Ns=p_product_qty_sales_dollar|1&pl=1¤tURL=%3FNs%3Dp_product_qty_sales_dollar%7C1&facetInfo=
Shark Guard blade guard for SawStop
Shark Guard blade guard for SawStop
7 pieces of 8"x10' DWV PVC solid core pipe
7 pieces of 8"x10' DWV PVC solid core pipe
6" flexible PVC hose 25' $92 http://wynnenv.com/products-page/woodworking_hose/pvc-hose/
6" flexible PVC hose 25' $92 http://wynnenv.com/products-page/woodworking_hose/pvc-hose/
electrical (wire, conduit, circuit breaker, switches, relay)
electrical (wire, conduit, circuit breaker, switches, relay)
Operating cost estimate:
Operating cost estimate:
== Language ==
== Language ==
Authorize the board to spend up to $4004 on a dust collection system. Authorization for the dust collector expires in 90 days. Authorization for the related equipment (ducting, hardware, ports, etc) expires in 180 days.
Authorize the board to spend up to $4854 on a dust collection system. Authorization for the dust collector expires in 90 days. Authorization for the related equipment (ducting, hardware, ports, etc) expires in 180 days.
== Receipts ==
[https://rt.pumpingstationone.org/Ticket/Display.html?id=925]
[https://rt.pumpingstationone.org/Ticket/Display.html?id=694]
==Receipts==
[https://rt.pumpingstationone.org/Ticket/Display.html?id=1000]