I have a profile with only a negative tolerance. How is my measured value positive, but the part is checking outtol=0. is the meas on the report an absolute value? I am exporting everything to measurlink and it is having trouble with the negative tolerance but positive meas.
ok, so if i am exporting this to measurlink software, how would i set it up to know that it is a negative value? Is my only option to use min/max readouts?
As Mikeg stated, Profile MEAS number will always be positive. One thing I learned from Rob Jensen, for profile always turn on Max and Min to see your deviations. It will help you and operators understand the measurement.
In command mode, just above your profile measurement, start typing FORMAT then hit F9 to open the formatting dialog box, and make sure max/min is selected. Click ok. Refresh the report.
Consider what the GD&T actually means...
Surf Prof w/in 0.1 unequal zone 0 (meaning that your overall tolerance band for your profile is 0.1 wide but that band is NOT plus/minus 0.05 from part nominal...that "0" is the amount of tolerance allowed to be IN SPACE off of the part. If you're scanning the outside diameter of a post and measuring to this GD&T then that tolerance band would all be on the inside of the material with NO allowance for the deviation going off of the print's basic diameter for that feature.
So theoretically, depending on your alignment and how the software reads the surface you're evaluating, it makes complete sense that all of your deviation would be in one direction.
With 0.1 worth of tolerance...but that modifier telling us that the allowable amount of tolerance hanging off of the part *key phrase* "IN SPACE" is zero, then yes the measurement can only be in 1 direction.
