Can you explain why it is important not to use the full deviation in both directions? Why wouldn't the machinist correct the full amount of X and Y to bring the holes back to nominal?
Thought I explained that above? Treat your hole as 2 Radii. If you move your Center point in the worst case direction, Draw a Radius with a protractor in the plus Direction lets say your X is your worst, and you draw a Radius in X minus, Your circle is complete. But you haven't accounted your Y, But YOUR CIRCLE IS COMPLETE, so the only thing your circle or your 2 Radii have in common is a center point, so you already accounted for the 2 Radii in each direction of X and you can't create 2 more Radii in the Y direction, You'll end up with a wollered hole or circle. Now if you shift the 2 Radii equally from the center, again because your circle is complete. if you move it half the deviation, Then the 2 radii will move equally in the Y direction, without distorting the circle, because It was already created in the X direction. If this is to complicated for you. I would strongly urge you not use this. <<<< not being rude, just don't know if I'm explaining my theory good enough, I'm stating it works for me.
Can you explain why it is important not to use the full deviation in both directions? Why wouldn't the machinist correct the full amount of X and Y to bring the holes back to nominal?
Thought I explained that above? Treat your hole as 2 Radii. If you move your Center point in the worst case direction, Draw a Radius with a protractor in the plus Direction lets say your X is your worst, and you draw a Radius in X minus, Your circle is complete. But you haven't accounted your Y, But YOUR CIRCLE IS COMPLETE, so the only thing your circle or your 2 Radii have in common is a center point, so you already accounted for the 2 Radii in each direction of X and you can't create 2 more Radii in the Y direction, You'll end up with a wollered hole or circle. Now if you shift the 2 Radii equally from the center, again because your circle is complete. if you move it half the deviation, Then the 2 radii will move equally in the Y direction, without distorting the circle, because It was already created in the X direction. If this is to complicated for you. I would strongly urge you not use this. <<<< not being rude, just don't know if I'm explaining my theory good enough, I'm stating it works for me.
I'm with Buck on this one. Why would you tell a machinist to only adjust half the deviation in one direction? No need for calculations when making adjustments to nominal...
