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Different Results No Radius vs Subtract radius distance dimension

Smasherofprobes
Hello everyone, not easy to explain this one. I have not had to do this in a long time and I am searching for the right answer.

I was tasked with measuring the relationship between 2 punches (Hole and Polygon) and the matching retainer but the distance between is different when I use No Radius VS Subtract radius. Obviously the numbers will be different because of the radius not being used but when I take the total distance from the Retainer and Subtract the total distance I get from the punches the numbers are different.

For example using No Radius I get 13.07 - 12.732 (0.338mm) and for subtract radius I get 7.307 - 6.666 (0.641mm) between CIR1 & LIN2
& No Radius 13.128 - 12.709 (0.419mm) and for subtract radius I get 7.355 - 6.603(0.752mm) between CIR2 & LIN3

Can someone explain why this is? Should I be using No radius or Subtract Radius to find the relationship between the two features?

I dimensioned 2D distance in the same direction as Lin1 for both. I am not the best at explaining things, forgive me Slight smile




Parents
  • aren't the punches IN the retainer? I mean, the retainer is what holds the punches. Do you mean the DIE STEEL, the thing the punches are forced through to make the hole in the sheet metal?

    I would NOT use PAR TO XAXIS for the distance since that required that LIN2 and LIN3 are perfectly perpendicular to LIN1, I would use PERP TO FEATURE so that the distance is calculated perpendicualr to the side of the hex.
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  • aren't the punches IN the retainer? I mean, the retainer is what holds the punches. Do you mean the DIE STEEL, the thing the punches are forced through to make the hole in the sheet metal?

    I would NOT use PAR TO XAXIS for the distance since that required that LIN2 and LIN3 are perfectly perpendicular to LIN1, I would use PERP TO FEATURE so that the distance is calculated perpendicualr to the side of the hex.
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