PLEASE MOVE RED BALL For drafting machine to work.
This mechanism forms the basis for the universal drafting machine.
I used to use a large drafting aid like this about 50 years ago. I think I still have one some where..I actually preferred the horizontal parallel slide guide with freely movable drafting triangles. I wasn't the only person who preferred that more open feeling solution. Now almost everyone uses CADwhich enables the 3rd axis.
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