weird sashigane
Posted: Fri Jan 20, 2017 4:26 pm
I just received two sashigane from Japan. One each of shaku and cm scales.
the root 2 side of the shaku sashigane isnt quite what I expected. The long arm is correct, but the short arm appears to be the same on both sides.
Note how the first scale marks do not form a square as would be expected if they were the same scale. Shouldn't both arms be root two larger? the metric scale on the short arm of the shaku shashigane is also incorrect. compare the 5cm mark on the metric square to the 5cm mark on the shaku square. its about 1.3mm short over 5cm. Is there a reason why this would be correct?
is the shaku sashigane just messed up?
sorry for the size of the pictures, I will make adjustments in the future.
the root 2 side of the shaku sashigane isnt quite what I expected. The long arm is correct, but the short arm appears to be the same on both sides.
Note how the first scale marks do not form a square as would be expected if they were the same scale. Shouldn't both arms be root two larger? the metric scale on the short arm of the shaku shashigane is also incorrect. compare the 5cm mark on the metric square to the 5cm mark on the shaku square. its about 1.3mm short over 5cm. Is there a reason why this would be correct?
is the shaku sashigane just messed up?
sorry for the size of the pictures, I will make adjustments in the future.