Thanks
@afish!
Linear Deflection = (width of control surface) * (sine of angle of deflection)
WoodPeckers squares claim accuracy of .001” over at 12” which is a maximum of 0.0085° angle of error. The protractor claims accuracy within ±0.3°. That said, if we’re comparing to the WP square, the linear deflection of the digital protractor at an error of 0.3° is 0.062”, 0.2° is 0.041”, and 0.1° is 0.02” ... this is a lot more inaccurate than I expected!
I know you can calibrate the miter angle on the Kapex within thousandths of an inch using the 5 cut method and a digital caliper ... I'll have to research if there's a method to do a similar accuracy on the bevel which carries over to the track saw.
Now I'm curious whether it's thousands or hundredths of an inch that the human eye can detect with a machinist square and light ...