Not really sure where to exactly i should've posted this but its here now. I am recently new to CMM so im still learning alot. That being said I have a slight issue with something im trying to do with my CMM I am trying to do an adaptive circle scan on the OD of a circle Ive gotten it adjusted correctly to the right diameter and depth to check it. When I start the program it makes contact with the part but then starts going away from the part. I think I need like a barrier. Similar to a clearance plane but reverse. Im sure its in PCDMIS and im just not seeing it. Any and all help is appreciated.
Not sure I follow what you mean by that. It is my understanding if it is on in the feature it will be used, also the sample hit setup parameters do not look correct and will cause problems.
Not sure I follow what you mean by that. It is my understanding if it is on in the feature it will be used, also the sample hit setup parameters do not look correct and will cause problems.
spacer of ZERO is ALWAYS a bad thing. If the part isn't perfect, you have a 50-50 chance of getting a bogus touch.
so then what should i set the spacer to be? I am still new to all this and have been using summary mode for the most part. So im not sure what exactly im hitting for spacer=0
the spacer needs to be a high enough number to ensure that the sample hit will hit on the surface surrounding the feature, and if you expect the feature to vary, then you need a higher number. I start at 3mm, and if I expect the feature to vary more than 2mm, I increase the spacer. For a circle (slot) with 3 sample hits, if you use 2mm spacer, and it is 2.5mm off location, your probe will be sliding into the hole to measure the surface, those sample hits make a plane the Pcdmis will then measure the circle in (like a workplane for a 2D feature). If one of them is skewed , ALL results are bad.
