BASIC DIMENSIONS USE G D &T TOLERANCING, THE QUESTION IS I HAVE BASIC DIMENSIONS COMING FROM X & Y AXIS. AM I SUPPOSED TO "CUT" THE TOLERANCE IN HALF WHEN DIMENSIONING THE BASIC DIMENSION? example X AND Y ARE BOTH [2.077] THE TRUE POSITION CALLOUT IS ALLOWING UP TO .015 SHOULD I USE .0075 FOR X AND .0075 FOR MY Y TOLERANCE?
There is a correct mathematical formula for calculating true position RFS. Simple and quick. Square deviation of X and Y, add them together, take the square root of that number and multiply that by 2. That would be the formula you give your operator.
I assume that could work in an educational setting. Around here, though, most machinists can't even spell "machinist" correctly, and you expect me to be able to teach them Pythagorean theorem? Even if I had better than a 10% chance of getting any one of these pikers who pass for operators on the floor to even use the equation properly, I've found that even a lot of educated people forget to multiply by 2 when doing a position calculation. No, I'm sorry, but I've TRIED doing that. I even had a supervisor translate my instructions into Spanish, Vietnamese, and Ukrainian, and STILL nobody did it correctly.
No, I'm sorry, but I'm just going to keep telling people to go 1/3 of the total in any direction. It's safer that way.
There is a correct mathematical formula for calculating true position RFS. Simple and quick. Square deviation of X and Y, add them together, take the square root of that number and multiply that by 2. That would be the formula you give your operator.
I assume that could work in an educational setting. Around here, though, most machinists can't even spell "machinist" correctly, and you expect me to be able to teach them Pythagorean theorem? Even if I had better than a 10% chance of getting any one of these pikers who pass for operators on the floor to even use the equation properly, I've found that even a lot of educated people forget to multiply by 2 when doing a position calculation. No, I'm sorry, but I've TRIED doing that. I even had a supervisor translate my instructions into Spanish, Vietnamese, and Ukrainian, and STILL nobody did it correctly.
No, I'm sorry, but I'm just going to keep telling people to go 1/3 of the total in any direction. It's safer that way.
