Ok, so I haven’t been around or posted much all week, so here is this weeks’ funny ha-ha to tide you over
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and what was used as the standard?
Am I the only one seeing write on so many levels?
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Also curious what you were using as a known level surface ti compare them with… I don’t doubt they are off.
As Long as we are going to take this too seriously, levels are one of the self proving tools. You need a sufficiently flat surface, (often a surface plate) and a sufficiently good/heavy straight edge. The surface plate must be installed at least a little less level than the max error you want to test, or less level than the precision of the levels you are working on.
Through any plane, there will be one set of parallel lines that are level. Presuming your your level is close, place it on the surface plate, and rotate it until it indicates level. Then bring in your straight edge, and rest it along the level. Ensure that the straight edge and level are lined up where the level reads level. Now using the straight edge as a fixed reference, rotate the level 180 degrees, and the reading is twice the error of the level.
In theory, you can adjust the angle of the straight edge until you get the same (reversed) reading in both directions, and you now have the straight edge indicating the true level line on the plane.
But going into this much detail just makes the joke wrong on one more level.
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