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Alignment Compensation AS1 85 Absolute Arm using probe. . .?

When aligning part with As1 85 Absolute Arm, both manually and auto (tried many times), we are getting compensation to the CAD in the opposite y axis for the probe size. This happened with both a 15mm & 6mm probe, as the compensations were 15 & 6 off the CAD model in +y axis (should be compensated in the -y axis 7.5 & 3). With trying two different probes and two methods of aligning, we cannot figure out why this is happening. Any thoughts on this would be greatly appreciated. Being used for alignment are two planes and a line for rotation. Thanks for your time.

Parents
  • Are the probes freshly calibrated and passing their length bar check? 
    If so, then is the base of your Romer aligned with the trihedron as displayed in your program?
    The line is controlling one of the axis origins and the rotation, correct? 

  • That is correct for the axis. The base of the Romer is not visualized in the program. Romer is set on the back side (y+) of the part. Plane on top(zstop), plane on left(xstop), angled plane on front intersecting with left side plane to make theoretical line in z axis(ystop & rotate) which part is rotated to. Only axis which is off to CAD is y, the full length of probe diameter. Alignment has been cleared and redone many times, occasionally it will work, and then not work eventually. And, the calibration for probe tips was done by Hexagon as we have a rental as ours is being calibrated and fixed. Probes and alignments work with other programs, just when making this new one does not seem to be working. 

Reply
  • That is correct for the axis. The base of the Romer is not visualized in the program. Romer is set on the back side (y+) of the part. Plane on top(zstop), plane on left(xstop), angled plane on front intersecting with left side plane to make theoretical line in z axis(ystop & rotate) which part is rotated to. Only axis which is off to CAD is y, the full length of probe diameter. Alignment has been cleared and redone many times, occasionally it will work, and then not work eventually. And, the calibration for probe tips was done by Hexagon as we have a rental as ours is being calibrated and fixed. Probes and alignments work with other programs, just when making this new one does not seem to be working. 

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