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Adaptive Scanning Settings

I see on the PC-DMIS help center that in the setup tab for an adaptive circle or cylinder scan, the tighter the tolerance entered for location, the faster the scan, whereas the tighter the tolerance entered for form, the slower the scan.  Why is this the case instead of it being the same for both?

Also, if I am scanning a hole that has 2 different tolerance ranges for size and location (say a hole size of .0625 +.0/.0005" with a location tolerance of .003"), do I enter both or do I only enter the tightest of the two?  Or do I forgo entering anything at all for size and just go with location?

Parents
  • In PC-DMIs 2022 there are boxes for size, form, and location. Enter the tolerances into the specified boxes, I am not sure about scanning speeds. However, I have been putting scanning into all of our programs by entering in the tolerances into those boxes without much issue. It also has a spot for the finish of the surface your scanning. 

    I asked a teacher at their Rhode Island location about this once and he said that he uses those boxes as well and never has an issue with them. For me if its good enough for a teacher at Hexagon its good enough for me.

  • Yeah, I use them as well.  The first part of my question was more about why the parameters are what they are just out of genuine curiosity.  The second part of my question was about the difference it makes in the advanced tab based on the information entered in the setup tab.  I noticed that in the example I gave if I enter both size and location tolerances, I end up with a different set of parameters compared to only entering location (the looser tolerance in this case).  However, when I only enter the size (the tighter tolerance), the parameters stay the same, hence me asking if the software only takes into consideration the tightest of the tolerances.  When I took the 201/202 course, the teacher initially said that if you want size AND location, to only bother checking the location box.  He didn't go into detail about it or explain anything further so I'm just wondering, for my own knowledge, if that's the way to go about it and why.  Up to this point I've just been entering all tolerances as applicable.

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  • Yeah, I use them as well.  The first part of my question was more about why the parameters are what they are just out of genuine curiosity.  The second part of my question was about the difference it makes in the advanced tab based on the information entered in the setup tab.  I noticed that in the example I gave if I enter both size and location tolerances, I end up with a different set of parameters compared to only entering location (the looser tolerance in this case).  However, when I only enter the size (the tighter tolerance), the parameters stay the same, hence me asking if the software only takes into consideration the tightest of the tolerances.  When I took the 201/202 course, the teacher initially said that if you want size AND location, to only bother checking the location box.  He didn't go into detail about it or explain anything further so I'm just wondering, for my own knowledge, if that's the way to go about it and why.  Up to this point I've just been entering all tolerances as applicable.

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