Re: adjustable square for SHS / box sections

"Bob La Londe"  wrote in message news:voap8m$od6b$1@dont-email.me...
What he is doing is pretty coarse I think.  Could probably do it with an
old wood workers marking gage and a nail for a scribe.  Hundreds of
years of fine wood working was done that way with a story board to
repeat measurements from piece to piece for "production" work.
Bob La Londe
------------------------------------
I learned the old methods from a semi-retired Swedish cabinet maker in 7th grade. One friend's father was an architect, another's building a wooden sailboat, and mine was remodeling old houses, so we all paid close attention and competed with each other. The standards of accuracy were bright light leaking through gaps between the work and a straightedge or the blade of a square, and a press fit that holds together, both difficult with worn metalworking machines. In 8th grade we took Drafting and repeated the competition for top grades. When I learned machine design and construction I needed (and received) no instruction while working in the Drafting department. The lessons also helped when I went into CAD circuit board layout and the design of RF-tight enclosures.
Recently I figured out how and practiced cutting large wood beams with a pruning bow saw as smoothly and squarely as with a machine. That went faster than the attempt to align my bandsaw and conveyer table on rough sloping ground. The weight of the beams threw off the alignment.