Sawmill Design 2: Difference between revisions
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*Motor for 20" blade - [https://www.surpluscenter.com/item.asp?UID=2009092710404007&item=9-1889&catname=hydraulic $250] | *Motor for 20" blade - [https://www.surpluscenter.com/item.asp?UID=2009092710404007&item=9-1889&catname=hydraulic $250] | ||
*Motor for 10" blade - [https://www.surpluscenter.com/item.asp?UID=2009092710404007&item=9-1184&catname=hydraulic $150] | *Motor for 10" blade - [https://www.surpluscenter.com/item.asp?UID=2009092710404007&item=9-1184&catname=hydraulic $150] | ||
*2 cylinders for lift and side motion - [https://www.surpluscenter.com/item.asp?UID=2009092710404007&item=9-7707-30&catname=hydraulic $160 each] | |||
Revision as of 16:04, 27 September 2009
What if we use steel sections to eliminane need for building a track?
10x4" I-beams in the 20 lb/ft range are available - see PDF page 132 in Structural Steel Sections
Use 30" hydraulic cylinders for y and z motion in a cantilevered configuration along the steel section x axis. Absolute simplest design is obtained, if 40 and 20 hp hydraulic motors are used for a 20" and 10" sawmill blade.
High performance, 60 hp sawmill at about $1000 in parts. Another breakthrough, as similar power costs at least $25k.
Calculations
[Hydraulic motor power] = torque (in-lb)*RPM/63k
- Take 5000 RPM, 166 in-lb motor for 13 hp
- take larger motor for 30 hp at 3500 RPM - at $250