Romer Arm - Profile of a Surface Changing

#1
Hello,
Thanks for all future help with this question.


I have a Romer Arm and I am using Polyworks as my inspection software.
The problem I am getting is after I scan the entire part and start to get my dimensions...
I got my Profile of a Surface of 1 edge...And it is at about 3mm.
I then got my true positions of the holes that are on that same plane, and those four holes are at 2.5mm, 3.2mm, 3.3mm...
Then when I go back to my Profile of a Surface of that same edge, the dimension changed to 4.1mm.


Why is this profile of a surface dimension changing after I find my true Positions?
 
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#3
I get that....But the profile is 1 dimension, and after I get the position, the profile is changing...I feel that the profile dimension should stay where it is at even after I get my True Position of the holes on that plane, right?
 

Stijloor

Staff member
Super Moderator
#4
I get that....But the profile is 1 dimension, and after I get the position, the profile is changing...I feel that the profile dimension should stay where it is at even after I get my True Position of the holes on that plane, right?
Can you post a (partial) drawing??
 
#5
Hello, always when you finish scanning, and before measuring, you must align in best fit, if any element is needed to align as the drawing indicates, the piece will be readjusted against the true alignment that the drawing asks for, that would be the result,

Note: if you move parameter setting to the elements you use to alienate
circles, planes, cylinders, the profile you measure will change every time,

regards,
 
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