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| {{GVCS Header}} | | {{GVCS Header}} |
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| =Goals and Industry Standards= | | ==Overview== |
| An [[Appropriate Scale]] [[GVCS]] worthy Sawmill with a modular design that integrates cleanly with [[GVCS]] equipment.
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| [[Image:sawmill.jpg|300px|thumb]] | | An [[Appropriate Scale]] [[GVCS]] worthy Sawmill with a modular design that integrates tightly with [[GVCS]] equipment. |
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| *[http://www.mobilemfg.com/ Mobile Dimension Sawmill] forms a good benchmark for the [[Industry Standard]] to start with. As the design progresses, it is expected to diverge radically from the initial prototype. Separation of the power unit, hydraulic power, and automation are being explored for later designs.
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| Here is a video of the Modile Dimension Sawmill from Missouri:
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| <html><object width="400" height="233"><param name="allowfullscreen" value="true" /><param name="allowscriptaccess" value="always" /><param name="movie" value="http://vimeo.com/moogaloop.swf?clip_id=28369397&server=vimeo.com&show_title=1&show_byline=1&show_portrait=1&color=00adef&fullscreen=1&autoplay=0&loop=0" /><embed src="http://vimeo.com/moogaloop.swf?clip_id=28369397&server=vimeo.com&show_title=1&show_byline=1&show_portrait=1&color=00adef&fullscreen=1&autoplay=0&loop=0" type="application/x-shockwave-flash" allowfullscreen="true" allowscriptaccess="always" width="400" height="233"></embed></object><p><a href="http://vimeo.com/28369397">Dimensional Sawmill in Missouri</a> from <a href="http://vimeo.com/user2016419">Open Source Ecology</a> on <a href="http://vimeo.com">Vimeo</a>.</p></html>
| | *[[Sawmill Design]] |
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| ==Subject Matter Expert Review==
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| See [[Benjamen Hansen Sawmill Note|Sawyer Benjamen Hansen's review of the proposed design]].
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| ===Comments=== | | ==Details== |
| #Use a platform with endstands - need vertical and horizontal alignment
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| #Track is extendable in modular sections
| | <iframe src="http://sketchup.google.com/3dwarehouse/mini?mid=83d920b67107ab08ffe76ed04c2d29ce&etyp=sw&width=400&height=300" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" width="400" height="300"></iframe> |
| | | </html> |
| =Design Notes and Rationale= | |
| '''Z Height Leveling'''
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| *Turnbuckle attached to upper z adjustment peg
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| '''Evenness of Z Height Raising Along 4 Posts'''
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| *Build 4 inch winch drum - each revolution winds 1' of wire
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| '''Log Taper Adjustment'''
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| *Disconnect mechanism for connecting rod between front and rear z-risers to create a height differential between the two ends of the log
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| '''Edger'''
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| *Adjustable from 1-3 blades in standard version, up to 6 for 6 2x2 lumbers in one pass
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| *In 3-blade configuration, top edger blade is controlled by a crank that can be adjusted while sawmill is running
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| '''Gantry'''
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| *Box truss design
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| '''Carriage''''
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| *Clearance of 1/8" around gantry
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| '''Hydraulic Hoses'''
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| *4 Hoses
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| *Mast at either end
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| '''Trailer Hitch'''
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| *Telescoping piece of tubing in frame
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| *Hitch retracts for sawmill operation
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| '''General'''
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| *Counterweight for hydraulic motor on one side of gantry - balancing
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| *Saw and collar - typically from same manufacturer
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| '''Vertical Motion'''
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| *One crank with a worm gear controls one side, connected to second side via connecting rod
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| *Vertical adjustment - 4 worm gear sets - [http://www.bostongear.com/products/open/index.html#]
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| *Bronze bushings - for vertical adjustments
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| '''Horizontal Motion - Crosswise'''
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| *Crank with indicator
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| *Sprocket with chain to another sprocket with pinion, riding on rack
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| *Rack faces down
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| *Sprocket and pinion sheltered from dust
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| *Connecting rod connects to other end
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| *Link rod contains a telescoping slip joint with pin, to retain of modularity of track lengths
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| '''Horizontal Motion - Lengthwise'''
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| *Festooned hydraulic hose
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| *Hydraulic motor rides under the gantry
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| *Engine moves carriage via a spool over which a wire is wrapped
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| '''Horizontal Dimension'''
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| *Set by guides that are rolled out with a single crank
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| '''Automatic Feed'''
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| *Separate hydraulic motor - with a riding bidirectional valve that trips its lever to other dimesion upon reaching end of track
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| *Wire drives carriage
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| *Have a safety trip in case of running into metal objects in wood
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| '''Dust Ejector'''
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| *On top of blade guard
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| '''Set Works'''
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| *Set relationship of saw to the log to make the next cut
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| *Dimensional sawmill needs setting in 2 dimensions
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| '''Log Holding'''
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| *2-stage dogs - one for staring the log (high center of gravity), and second for low center of gravity
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| *May want to flip log if it's difficult to hold towards the end
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| ==Outstanding Design Issues== | | <html><object width="400" height="233"><param name="allowfullscreen" value="true" /><param name="allowscriptaccess" value="always" /><param name="movie" value="http://vimeo.com/moogaloop.swf?clip_id=28369397&server=vimeo.com&show_title=1&show_byline=1&show_portrait=1&color=00adef&fullscreen=1&autoplay=0&loop=0" /><embed src="http://vimeo.com/moogaloop.swf?clip_id=28369397&server=vimeo.com&show_title=1&show_byline=1&show_portrait=1&color=00adef&fullscreen=1&autoplay=0&loop=0" type="application/x-shockwave-flash" allowfullscreen="true" allowscriptaccess="always" width="400" height="233"></embed></object></html> |
| *Hydraulic hose cabling guide
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| *Multiple edger blades in future
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| *Crank edger adjuster
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| '''Action Points'''
| | *[http://www.mobilemfg.com/ Mobile Dimension Sawmill] is being used as a initial [[Industry Standard]]. As the design progresses, it is expected to diverge radically from the initial prototype. Separation of the power unit, hydraulic power, and automation are being explored for later designs. |
| *Saw collar | |
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| =Design= | | <html><iframe src="https://player.vimeo.com/video/48464146?color=4b2582" width="500" height="281" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe> <p><a href="http://vimeo.com/48464146">Open Source Dimensional Sawmill</a> from <a href="http://vimeo.com/opensourceecology">Open Source Ecology</a> on <a href="http://vimeo.com">Vimeo</a>.</p></html> |
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| ===CAD===
| | *Open Source Dimensional Sawmill - first prototype testing at Factor e Farm |
| *http://openpario.mime.oregonstate.edu/projects/osusawmill/documents | |
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| ===Materials Sourcing=== | | =First Cut= |
| *[10] 3/4" bearings for rollers on top of gantry- [http://www.vxb.com/page/bearings/PROD/3-4inch/Kit7065]
| | <html><iframe width="400" height="300" src="https://www.youtube.com/embed//51YWaaMpXQA" frameborder="0" allowfullscreen></iframe></html> |
| *Cam followers - 4x the cost - [http://www.mcmaster.com/#cam-followers/=dbhz2g]
| | ==Industry Standards== |
| *[4] V-groove bearing for x (transverse) direction motion on inverted angle- [http://www.vxb.com/page/bearings/PROD/Kit8406]
| | *Mobile Dimensions sawmill - $34k with trailer |
| *[4] 2-bolt, 1/2" flange bearing for y (lengthwise) motion - for pinion gear shaft
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| *Rack - 8' - [http://opensourceecology.org/wiki/Great_price_on_the_rack]
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| *[2] Main shaft pillow block bearings, 1-7/8" - [https://www.surpluscenter.com/item.asp?item=1-210-30-P&catname=powerTrans]
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| *[2] Secondary blade pillow block bearings - [https://www.surpluscenter.com/item.asp?item=1-208-24-P&catname=powerTrans] | |
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| ===Fabrication=== | | =Specifications= |
| '''Blade'''
| | *Recommended RPM for main 30" blade - 1000-1550 rpm |
| *Anneal blade to machine | | *Recommended RPM for 13" edger blade - 2250 - 3550 |
| *Harden blade by heating and quenching
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| *Surface grind to flatness
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| '''Dogs'''
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| *1.25" square bar, sharpened to a 45 deg angle
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| '''Log Handling'''
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| *CAT 966 was industry standard for large sawmills; largest logs are 14000 lb
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| *John Deere 450 bulldozer - entry level, handy tool
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| *Yale lift
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| =Prototype I: OSE Open Source Dimensional Sawmill=
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| First prototype debut - partial completion - September 10, 2011:
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| <html><iframe width="210" height="170" src="https://www.youtube.com/embed//0SPxJ_FlKHU" frameborder="0" allowfullscreen></iframe>
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| <iframe width="210" height="170" src="https://www.youtube.com/embed//IFS2xkpr_7Q" frameborder="0" allowfullscreen></iframe>
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| <iframe width="210" height="170" src="https://www.youtube.com/embed//pAQvFwD5CdA" frameborder="0" allowfullscreen></iframe>
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| <iframe width="210" height="170" src="https://www.youtube.com/embed//KXe6LJB1b-I" frameborder="0" allowfullscreen></iframe>
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| </html>
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| ==Documentation==
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| *Z raising mechanism: worm gear for 4 posts, with adjustable wire tension | |
| *Y axis - transverse motion - gear rack with chain linkage
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| *
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| =See Also= | | =See Also= |
| | *[[Dimensional Sawmill Prototype I]] |
| *[[Sawmill - Design Rationale]] | | *[[Sawmill - Design Rationale]] |
| | *[[Benjamen Hansen Sawmill Note|Subject Matter Expert Review]]. |
| *[[Sawmill Analysis]] | | *[[Sawmill Analysis]] |
| *[[Sawmill Archive]] | | *[[Sawmill Archive]] |
| | | *[[Log Splitter]] |
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| {{GVCS Footer}} | | {{GVCS Footer}} |
