I need to measure a dimension to the centerline of a radius, but the radius is 2" and only covers an arc of about 25 degrees. Measured on the optical comparator, the radius is nearly nominal, but on the CMM it measures 2.117". This throws my centerline over .100" out of position. How can I create a centerline from points on the radius using the nominal radius? Can I force PC-DMIS to best fit a 2" radius to points on the surface?
IT IS PERFECT OFF-LINE, ITS WHEN I CHECK IT ON-LINE THAT IT TURNS OUT LOUSY. NEITHER THE TOP TWO COMPARED TO EACH OTHER NORE THE BOTTOM TWO COMPARED TO EACH OTHER ARE CLOSE TO EACH OTHER. THE RADIUS FOR TOP 95 MAY CHECK 127 AND BE OFF LOCATION 32MM ( WHICH IS EXACTLY WHAT THE RADIUS SIZE IS OFF ) BUT THE TOP SCAN RADIUS MAY ONLY BE OF 1mm. SAME RESULTS FOR THE BOTTOM BUT MAY BE OPPISITE AND THE SCAN WILL BE OFF 25mm.
THE POLAR RADIUS IS STUMPING ME. I THINK WHAT IS BEING TOLD FOR ME TO DO IS TO TAKE A VECTOR POINT WITH CAD AND THEN COMPARE THAT VECTOR POINT NOMINAL TO THE ACTUAL POINT? POLAR RADIUS? IS THAT "Prad"?
WHEN I COMPARE ANY OF THE "Prad" OFF-LINE VECTOR POINTS TO ANY OF THE SCANNED HITS I GET A VARIETY OF READINGS. I GUESS TO ME THE "Prad" IS THE ANGLE AT WHICH THE PROBES IJK IS ACTUALLY HITTING THE PART.
FREAK IS SUGGESTING USING THE X-Y OF MY CAD POINTS TO THE X-Y OF MY ACTUALS - THAT SOUNDS OK, BUT IT STILL DOESN'T SOLVE MY TRUE POSITION CALL OUT. IT SOUNDS LIKE I SHOULD TALK TO OUR ENGINEER AND HAVE IT CHANGED TO A PROFILE?
AS YOU CAN TELL, I AM VERY CONFUSED WITH THIS ONE, YOU WOULD THINK IT WAS EARLY MONDAY MORNING FOR ME.
IT IS PERFECT OFF-LINE, ITS WHEN I CHECK IT ON-LINE THAT IT TURNS OUT LOUSY. NEITHER THE TOP TWO COMPARED TO EACH OTHER NORE THE BOTTOM TWO COMPARED TO EACH OTHER ARE CLOSE TO EACH OTHER. THE RADIUS FOR TOP 95 MAY CHECK 127 AND BE OFF LOCATION 32MM ( WHICH IS EXACTLY WHAT THE RADIUS SIZE IS OFF ) BUT THE TOP SCAN RADIUS MAY ONLY BE OF 1mm. SAME RESULTS FOR THE BOTTOM BUT MAY BE OPPISITE AND THE SCAN WILL BE OFF 25mm.
THE POLAR RADIUS IS STUMPING ME. I THINK WHAT IS BEING TOLD FOR ME TO DO IS TO TAKE A VECTOR POINT WITH CAD AND THEN COMPARE THAT VECTOR POINT NOMINAL TO THE ACTUAL POINT? POLAR RADIUS? IS THAT "Prad"?
WHEN I COMPARE ANY OF THE "Prad" OFF-LINE VECTOR POINTS TO ANY OF THE SCANNED HITS I GET A VARIETY OF READINGS. I GUESS TO ME THE "Prad" IS THE ANGLE AT WHICH THE PROBES IJK IS ACTUALLY HITTING THE PART.
FREAK IS SUGGESTING USING THE X-Y OF MY CAD POINTS TO THE X-Y OF MY ACTUALS - THAT SOUNDS OK, BUT IT STILL DOESN'T SOLVE MY TRUE POSITION CALL OUT. IT SOUNDS LIKE I SHOULD TALK TO OUR ENGINEER AND HAVE IT CHANGED TO A PROFILE?
AS YOU CAN TELL, I AM VERY CONFUSED WITH THIS ONE, YOU WOULD THINK IT WAS EARLY MONDAY MORNING FOR ME.
