1.Sawmill
看了Wood-Mizer LT28开圆木，有如刀切黄油。该机是单臂悬梁结构，X轴是方钢上下焊有1“圆钢做导轨，链条传动；Z轴也是方钢外套滑轨用起重绞盘调高；Y轴是悬臂上装电点火汽油引擎和带锯。带锯条是Raptor的0.042x1-1/4“x132”。下面的Timbert M100也是同样锯条但锯宽为26“，用subaru 7HP引擎，整机只要3000刀。walmart 132"x0.035x1" saw blade $92.27:http://www.walmart.com/ip/11-ft.-Bimetal-Band-Saw-Blade-EA-1-79652CLB113355/46814061
http://www.timbery.com/raptor-blades.html
油管有不少DIY的。目前看来，用废旧摩托轮是较好的方案，似可借用其链条传动，或直接用其汽油机。208cc/6HP电打火 150+28.5： http://www.northerntool.com/shop/tools/product_200638383_200638383
https://www.youtube.com/watch?v=dFNpKC3JTVQ
https://www.youtube.com/watch?v=PSHWDZ0r9wY
https://www.youtube.com/watch?v=HRNGelIVPco
https://www.youtube.com/watch?v=D1dNR0o0bjE
16" tire http://www.northerntool.com/shop/tools/product_200486371_200486371
带锯，如555的锯木速度是1500-3000FPM，另有建议锯木/铝为1000，锯钢/铜为100-150。电机一般为1725/3450rpm，减速比可取1：2或1：4。例如ebay 1"bore 2.5"OD pulley.
chain saw kit: https://www.youtube.com/watch?v=s21unFgBuQU
适合上述kit的Stihl MS 441： http://www.ebay.com/itm/Stihl-MS-441-C-MAGNUM-Powerful-Chain-Saw-25-bar-chain-71cc-/201354984838?pt=LH_DefaultDomain_0&hash=item2ee1b13d86
2.Band saw
24" band saw: http://www.stumpynubs.com/24in-band-saw.html
带锯：https://www.youtube.com/watch?v=rhFEVf8zZkg https://www.youtube.com/watch?v=QAqonZUf1sU https://www.patreon.com/user?u=865843&ty=h
better one：http://lumberjocks.com/projects/107378 https://www.youtube.com/watch?v=K2wLdhZjKBM
https://www.youtube.com/watch?v=7_Gdp5255kw
3. 铣平板
