hey guys! I'm having trouble validating a measurement method. I am finding different values of concentricity between two diameters. We have already tested leveling in different work planes and positions and the values do not match when compared. in DCC mode I am always creating a plane and a cylinder, where I level and give origin to the cylinder and the plane is my height reference. In this cylinder that I level, I measure three diameters and after measuring them, I measure another larger diameter that is about 20mm away from them and I make the concentricity between them.depending on whether I place the piece lying down or standing up, changing my work plane, my concentricity varies from 0.070mm to 0.200mm. what do you think it could be?
At top of program with STARTUP alignment recalled, construct a plane and force the vector to be X+, lets call it PLN_THEO_XP
Then, probe your plane and datum cylinder. For the datum cylinder I would use a logical amount of hits for the size & use AT LEAST 4 levels of hits so you can cover as much of the surface as possible. For concentricity checks I usually use 5 or 7 levels depending on the length of the datum surface.
Then, INSERT/ALIGNMENT/NEW: Level to datum CYL, rotate to PLN_THEO_XP, CYL = XY origin and PLN = Z origin
Then, measure the features you'd like to check the concentricity of as CYLINDERS
Remember, concentricity is the evaluation of derived median center points along a CYLINDRICAL AXIS so you need to be measuring the features you're evaluating as cylinders...NOT circles...in order to be geometrically correct here.
At top of program with STARTUP alignment recalled, construct a plane and force the vector to be X+, lets call it PLN_THEO_XP
Then, probe your plane and datum cylinder. For the datum cylinder I would use a logical amount of hits for the size & use AT LEAST 4 levels of hits so you can cover as much of the surface as possible. For concentricity checks I usually use 5 or 7 levels depending on the length of the datum surface.
Then, INSERT/ALIGNMENT/NEW: Level to datum CYL, rotate to PLN_THEO_XP, CYL = XY origin and PLN = Z origin
Then, measure the features you'd like to check the concentricity of as CYLINDERS
Remember, concentricity is the evaluation of derived median center points along a CYLINDRICAL AXIS so you need to be measuring the features you're evaluating as cylinders...NOT circles...in order to be geometrically correct here.
